Diamond Bar Warnings, Watches and Advisories

Do not drive vehicles through flooded areas. The water depth or fast flowing water/mud/debris from a flash flood will make road conditions unsafe. Do not rely soley on data presented here or other third-party websites - always check your official national and local weather service agency website, socials, radio and/or TV stations for making critical decisions related to weather events.

Please carefully read each posted Warning and Alert as it relates to the area(s) being affected. We may provide a wider range of issued severe weather warnings for surrounding cities and counties, so some alerts may not directly impact this location. This is done to help with preparing for severe weather that may overlap or be heading towards Diamond Bar.

Use the Radar Maps link provided to understand the trajectory of a storm.

Flood Warning issued November 21 at 8:26PM PST until November 23 at 1:00AM PST by NWS Eureka CA

...The Flood Warning is extended for the following rivers in California... Russian River near Hopland affecting Mendocino County. Navarro River at Navarro affecting Mendocino County. For the Russian River...including Hopland...Minor flooding is forecast. For the Navarro River...including Navarro...Minor flooding is forecast. * WHAT...Minor flooding is forecast. * WHERE...Navarro River at Navarro. * WHEN...From late tonight to early Saturday morning. * IMPACTS...At 23.0 feet, Flooding of Highway 128 approximately 5 miles east of Highway 1 is certain and the road will be closed. Motorists should use alternate routes. * ADDITIONAL DETAILS... - At 7:15 PM PST Thursday the stage was 19.7 feet. - Forecast...The river is expected to rise above flood stage just after midnight tonight to a crest of 27.5 feet early tomorrow afternoon. It will then fall below flood stage tomorrow evening. - Flood stage is 23.0 feet. - Flood History...This crest compares to a previous crest of 26.7 feet on 03/24/2011. - http://www.weather.gov/safety/flood

Flood Warning issued November 21 at 8:26PM PST until November 23 at 9:00AM PST by NWS Eureka CA

...The Flood Warning is extended for the following rivers in California... Russian River near Hopland affecting Mendocino County. Navarro River at Navarro affecting Mendocino County. For the Russian River...including Hopland...Minor flooding is forecast. For the Navarro River...including Navarro...Minor flooding is forecast. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Russian River near Hopland. * WHEN...Until late Saturday morning. * IMPACTS...At 17.0 feet, Significant flooding of Highway 175 at the approaches to the Russian River bridge. Minor flooding of Highway 222 near Ukiah, and in crop land along the left and right banks of the Russian River near Hopland. * ADDITIONAL DETAILS... - At 7:45 PM PST Thursday the stage was 15.2 feet. - Bankfull stage is 21.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 7:45 PM PST Thursday was 15.3 feet. - Forecast...The river will rise to 15.4 feet just after midnight tonight. It will then fall just after midnight tonight. It will rise to 17.4 feet early tomorrow afternoon. It will then fall below flood stage late tomorrow evening to 7.0 feet late Sunday morning. - Flood stage is 15.0 feet. - Flood History...This crest compares to a previous crest of 17.6 feet on 01/18/2016. - http://www.weather.gov/safety/flood

Flood Warning issued November 21 at 8:23PM PST by NWS San Francisco CA

...The National Weather Service in San Francisco CA has issued a Flood Warning for the following rivers in California... Russian River at Johnsons Beach at Guerneville affecting Sonoma County. For the Russian River...including Johnsons Beach at Guerneville... Minor flooding is forecast. * WHAT...Minor flooding is forecast. * WHERE...Russian River at Johnsons Beach at Guerneville. * WHEN...From Friday afternoon until further notice. * IMPACTS...At 33.0 feet, In Guerneville the intersection of HWY 116 and Drake Rd is closed. In Monte Rio Willow and Alder Streets flood. In Forestville Mirabel trailer park begins to flood. * ADDITIONAL DETAILS... - At 8:00 PM PST Thursday the stage was 21.9 feet. - Bankfull stage is 32.0 feet. - Forecast...The river is expected to rise above flood stage tomorrow afternoon and continue rising to a crest of 33.7 feet early Saturday morning. - Flood stage is 32.0 feet. - Flood History...This crest compares to a previous crest of 33.4 feet on 12/12/2014. - http://www.weather.gov/safety/flood

Winter Storm Warning issued November 21 at 7:48PM PST until November 26 at 4:00PM PST by NWS Hanford CA

* WHAT...Heavy snow possible above 6500 feet. Total snow accumulations between 10 and 24 inches possible. High elevation snow up to 4 feet. Winds could gust as high as 50 mph. * WHERE...A portion of central California. * WHEN...From 4 PM Friday to 4 PM PST Tuesday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult to impossible. The hazardous conditions could impact the Friday evening and Monday morning commutes. Gusty winds could bring down tree branches.

Frost Advisory issued November 21 at 7:32PM PST until November 22 at 8:00AM PST by NWS Los Angeles/Oxnard CA

* WHAT...Temperatures as low as 29 will result in frost formation. * WHERE...Ojai Valley. * WHEN...From 2 AM to 8 AM PST Friday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Flood Warning issued November 21 at 7:31PM PST until November 23 at 5:48PM PST by NWS Eureka CA

...The Flood Warning continues for the following rivers in California... Eel River at Fernbridge affecting Humboldt County. For the Eel River...including Fernbridge...Major flooding is forecast. * WHAT...Major flooding is forecast. * WHERE...Eel River at Fernbridge. * WHEN...Until Saturday afternoon. * IMPACTS...At 25.0 feet, Severe flooding of the Eel River Delta including areas northwest of Loleta and the western portion of Cannibal Island Road. Numerous road closures in low-lying areas, including Highway 211 to Ferndale. A Special Action Advisory is issued to all owners of livestock in low-lying areas near the river. Appropriate action should be taken to protect livestock. * ADDITIONAL DETAILS... - At 6:15 PM PST Thursday the stage was 16.5 feet. - Bankfull stage is 20.0 feet. - Forecast...The river is expected to rise above flood stage late this evening to a crest of 25.4 feet early tomorrow afternoon. It will then fall below flood stage late Saturday morning. - Flood stage is 20.0 feet. - Flood History...This crest compares to a previous crest of 25.6 feet on 02/27/2019. - http://www.weather.gov/safety/flood

Flood Warning issued November 21 at 7:06PM PST until November 22 at 4:00PM PST by NWS San Francisco CA

* WHAT...Urban areas and small streams flooding caused by excessive rainfall continues. * WHERE...East central Sonoma County. * WHEN...Until 400 PM PST Friday. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring. Numerous roads remain closed due to flooding. Low-water crossings are inundated with water and may not be passable. * ADDITIONAL DETAILS... - At 705 PM PST, Doppler radar and automated rain gauges indicated an area of very heavy rainfall across the warned area. Flooding is already occurring along Sonoma Creek at Kenwood and Agua Caliente with additional rises possible. Between 3.5 and 7 inches of rain have fallen. Water levels may fall during breaks in the rain but rise quickly after the rain resumes. - Additional rainfall amounts of 2 to 4 inches are possible in the warned area. - Some locations that will experience flooding include... Sonoma, Boyes Hot Springs, Eldridge, Glen Ellen, Fetters Hot Springs-Agua Caliente, Fetters Hot Spring, El Verano and Temelec. - http://www.weather.gov/safety/flood

Flood Warning issued November 21 at 7:04PM PST until November 22 at 4:00PM PST by NWS San Francisco CA

* WHAT...Urban areas and small streams flooding caused by excessive rainfall continues. * WHERE...Central Sonoma County. * WHEN...Until 400 PM PST Friday. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring. Numerous roads remain closed due to flooding. Low-water crossings are inundated with water and may not be passable. * ADDITIONAL DETAILS... - At 702 PM PST, Doppler radar and automated rain gauges indicated an area of very heavy rainfall across the warned area. Between 3 and 15 inches of rain have fallen. Minor to moderate flooding is occuring at Green Valley Creek at Martinelli, Mark West Creek near Mirabel Heights, Maacama Creek near Kellogg, Santa Rosa Creek at Willowside, Colgan Creek near Sebastopol, Laguna de Santa Rosa near Stony Point, and Copeland Creek at Rohnert Park. Additional rises will be possible across the warned area. Water levels may fall during breaks in the rain but rise quickly after the rain resumes. - Additional rainfall amounts of 1 to 5 inches are possible in the warned area. - Some locations that will experience flooding include... Santa Rosa, Rohnert Park, Windsor, Healdsburg, Sebastopol, Cotati, Larkfield-Wikiup, Roseland, South Santa Rosa Cdp, Forestville, Guerneville, Graton and South Santa Rosa. - http://www.weather.gov/safety/flood

Flood Advisory issued November 21 at 5:01PM PST until November 23 at 3:15AM PST by NWS San Francisco CA

* WHAT...Urban area and small stream flooding caused by excessive rainfall continues. * WHERE...All of Marin, Sonoma, and Napa Counties. * WHEN...Until 315 AM PST Saturday. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Water over roadways. Overflowing poor drainage areas. * ADDITIONAL DETAILS... - At 500 PM PST, Doppler radar and automated rain gauges indicated heavy rain. This is causing urban and small stream flooding. Between 4 and 17 inches of rain have fallen. - Additional rainfall amounts of 1 to 4.5 inches are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... Santa Rosa, Napa, Petaluma, San Rafael, Novato, Rohnert Park, Windsor, American Canyon, Mill Valley, San Anselmo, Larkspur, Healdsburg, Sonoma, Corte Madera, Tiburon, Cloverdale, Fairfax, Sebastopol, Cotati and Sausalito. - http://www.weather.gov/safety/flood

Flood Watch issued November 21 at 3:58PM PST until November 23 at 4:00AM PST by NWS Sacramento CA

* WHAT...Prolonged periods of moderate to heavy rain with additional amounts of 1 to 3 inches expected, and up to 3 to 8 inches possible in the foothills. Flooding caused by excessive rainfall is possible. * WHERE...A portion of northern California, including the following areas, Central Sacramento Valley, Mountains Southwestern Shasta County to Western Colusa County, Northeast Foothills/Sacramento Valley, Northern Sacramento Valley and Shasta Lake Area / Northern Shasta County. * WHEN...Through late Friday night. * IMPACTS...Excessive runoff may result in sharp rises of rivers, creeks, and streams, and ponding of water or flooding on roadways and other low-lying locations. * ADDITIONAL DETAILS... - http://www.weather.gov/safety/flood

Flood Watch issued November 21 at 2:52PM PST until November 23 at 4:00AM PST by NWS San Francisco CA

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...The North Bay. * WHEN...Through late Friday night. * IMPACTS...Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Low-water crossings may be flooded. * ADDITIONAL DETAILS... - Light to moderate rain is continuing across the watch area. Three to eleven inches of rain have already fallen in the valley regions with up to sixteen inches of rain in the higher elevations. Areas of the Sonoma County valleys have already reported minor to moderate flooding and road closures. - http://www.weather.gov/safety/flood

High Wind Warning issued November 21 at 2:34PM PST until November 22 at 10:00AM PST by NWS Medford OR

* WHAT...South winds 25 to 40 mph with gusts up to 60 mph. * WHERE...Northeast Siskiyou and Northwest Modoc Counties, this includes the cities of Macdoel, Dorris, Tulelake, and Newell. * WHEN...Until 10 AM PST Friday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles.

High Wind Warning issued November 21 at 2:34PM PST until November 22 at 10:00AM PST by NWS Medford OR

* WHAT...For the High Wind Warning, south winds 25 to 40 mph with gusts up to 65 mph. For the Wind Advisory, south winds 20 to 30 mph with gusts up to 50 mph. * WHERE...For the high wind warning. Portions of Lake and Modoc counties and far eastern Klamath County, including Lakeview, Valley Falls, Bly, Paisley, Summer Lake, Silver Lake, Adel, Fort Rock, the Warner and Hart mountains, and portions of Highways 395, 31, and 140. Southwest Klamath counties, including Klamath Falls, Bonanza, and portions of Highways 97, 140, 39, and 139. For the wind advisory, the remainder of zones, including the cities of Modoc Point, Chemult, Crescent, Canby and Alturas. * WHEN...For the High Wind Warning, until 10 AM PST Friday. For the Wind Advisory, until 4 PM PST Friday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles.

High Wind Warning issued November 21 at 2:34PM PST until November 22 at 10:00AM PST by NWS Medford OR

* WHAT...South winds 25 to 40 mph with gusts up to 60 mph. * WHERE...The Shasta Valley in central Siskiyou COunty, including Weed, Grenada, Montague, and portions of Interstate 5 and Highway 97. * WHEN...Until 10 AM PST Friday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles.

Wind Advisory issued November 21 at 2:34PM PST until November 22 at 4:00PM PST by NWS Medford OR

* WHAT...For the High Wind Warning, south winds 25 to 40 mph with gusts up to 65 mph. For the Wind Advisory, south winds 20 to 30 mph with gusts up to 50 mph. * WHERE...For the high wind warning. Portions of Lake and Modoc counties and far eastern Klamath County, including Lakeview, Valley Falls, Bly, Paisley, Summer Lake, Silver Lake, Adel, Fort Rock, the Warner and Hart mountains, and portions of Highways 395, 31, and 140. Southwest Klamath counties, including Klamath Falls, Bonanza, and portions of Highways 97, 140, 39, and 139. For the wind advisory, the remainder of zones, including the cities of Modoc Point, Chemult, Crescent, Canby and Alturas. * WHEN...For the High Wind Warning, until 10 AM PST Friday. For the Wind Advisory, until 4 PM PST Friday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles.

High Surf Advisory issued November 21 at 2:10PM PST until November 22 at 6:00AM PST by NWS San Francisco CA

* WHAT...Large breaking waves between 14 to 19 ft along southwest facing beaches and between 19 to 22 ft along well exposed west facing beaches. * WHERE...San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast and Southern Monterey Bay and Big Sur Coast Counties. * WHEN...Until 6 AM PST Friday. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion. Large waves can sweep across the beach without warning, pulling people into the sea from rocks, jetties and beaches. Sudden immersion in cold water can result in cold water shock even for the most experienced swimmers. Cold water shock can result in dramatic changes in breathing, heart rate and blood pressure, greatly increasing the risk of drowning in rough open waters.

Beach Hazards Statement issued November 21 at 2:10PM PST until November 22 at 6:00AM PST by NWS San Francisco CA

* WHAT...A moderate period northwest swell will result in a more energetic surf zone and an increased risk of sneaker waves and rip currents. Breaking waves of 10 to 13 ft are expected with some potential for breaking waves up to 15 ft to develop. * WHERE...Northern Monterey Bay County. * WHEN...Through late Thursday night. * IMPACTS...Dangerous swimming and surfing conditions. Large waves can sweep across the beach without warning, pulling people into the sea from rocks, jetties, and beaches. Sudden immersion in cold water can result in cold water shock even for the most experienced swimmers. Cold water shock can result in dramatic changes in breathing, heart rate and blood pressure, greatly increasing the risk of drowning in rough open waters.

Flood Warning issued November 21 at 2:04PM PST until November 22 at 8:00PM PST by NWS Eureka CA

* WHAT...Urban areas and small streams flooding caused by excessive rainfall is expected. * WHERE...A portion of northwest California, including the following county, southwestern Mendocino. * WHEN...Until 800 PM PST Friday. * IMPACTS...Prolonged, heavy rainfall is causing the Garcia River at Point arena to rise significantly enough to flood Highway 1 between Flumeville and Stornetta. The Garcia River is forecast to peak near 12 AM Friday at 15 feet. Attitudinal heavy rainfall is forecast to continue through tonight. * ADDITIONAL DETAILS... - At 204 PM PST, Doppler radar indicated heavy rain. Flooding is ongoing or expected to begin shortly in the warned area. - Some locations that will experience flooding include... Mainly rural areas of Southwestern Mendocino County. - http://www.weather.gov/safety/flood

Flood Warning issued November 21 at 2:04PM PST until November 23 at 5:00PM PST by NWS Sacramento CA

...The National Weather Service in Sacramento CA has issued a Flood Warning for the following rivers in California... Sacramento River At Tehama Bridge affecting Tehama County. For the Upper Sacramento River...including Tehama Bridge...Minor flooding is forecast. * WHAT...Minor flooding is forecast. * WHERE...Sacramento River at Tehama Bridge. * WHEN...From Friday morning to Saturday afternoon. * IMPACTS...At 206.7 feet, Water into RV park on east side of river. Tires of trailers get wet. At 209.7 feet, Flood stage - Road inside trailer park and turn around site under RR tracks (Tehama/Vina road) become impassible. Water is into area around structures on east side of river. No structural damage. Sheriff's office issues advisory. Makes sure Pelhams Bay, Snug Harbor, River Inn (small trailer parks all in a row on east side of river north of bridge) know of advisory. At 210.7 feet, Between 210 and 211 feet the county park becomes inaccessible. At 211 feet water begins to enter Driftwood RV fishing resort on east bank of river and just north of the county park. * ADDITIONAL DETAILS... - At 1:00 PM PST Thursday the stage was 202.5 feet. - Bankfull stage is 206.5 feet. - Forecast...The river is expected to rise above flood stage tomorrow morning to a crest of 210.7 feet early tomorrow afternoon. It will then fall below flood stage early Saturday morning. - Flood stage is 209.5 feet. - Flood History...This crest compares to a previous crest of 210.7 feet on 02/10/2007. - http://www.weather.gov/safety/flood

Flood Warning issued November 21 at 1:53PM PST until November 22 at 3:08PM PST by NWS Eureka CA

...The Flood Warning is extended for the following rivers in California... Mad River near Arcata affecting Humboldt County. Eel River at Fernbridge affecting Humboldt County. Van Duzen River Near Bridgeville affecting Humboldt County. For the Mad River...including Arcata...Minor flooding is forecast. For the Eel River...including Fernbridge...Major flooding is forecast. For the Van Duzen River...Including Bridgeville...Minor flooding is forecast. * WHAT...Minor flooding is forecast. * WHERE...Van Duzen River near Bridgeville. * WHEN...From late tonight to tomorrow afternoon. * IMPACTS...At 18.0 feet, Minor flooding of Highway 36 near Grizzly Creek State Park and in lower portions of the State Park itself. Moderate flooding of River Bar Road in the Starvation Flats area. * ADDITIONAL DETAILS... - At 1:15 PM PST Thursday the stage was 10.1 feet. - Bankfull stage is 17.0 feet. - Forecast...The river is expected to rise above flood stage late tonight to a crest of 17.6 feet tomorrow morning. It will then fall below flood stage late tomorrow morning. - Flood stage is 17.0 feet. - Flood History...This crest compares to a previous crest of 17.1 feet on 01/18/2016. - http://www.weather.gov/safety/flood

Flood Warning issued November 21 at 1:53PM PST until November 22 at 6:09PM PST by NWS Eureka CA

...The Flood Warning is extended for the following rivers in California... Mad River near Arcata affecting Humboldt County. Eel River at Fernbridge affecting Humboldt County. Van Duzen River Near Bridgeville affecting Humboldt County. For the Mad River...including Arcata...Minor flooding is forecast. For the Eel River...including Fernbridge...Major flooding is forecast. For the Van Duzen River...Including Bridgeville...Minor flooding is forecast. * WHAT...Minor flooding is forecast. * WHERE...Mad River near Arcata. * WHEN...From Friday morning to tomorrow evening. * IMPACTS...At 23.0 feet, Significant flooding of portions of Mad River Beach Road and adjacent farmlands is likely. May cause water to flow across roads to Tyee City. High tides and strong, onshore winds will aggravate flood impacts. * ADDITIONAL DETAILS... - At 12:45 PM PST Thursday the stage was 16.8 feet. - Bankfull stage is 22.0 feet. - Forecast...The river will fall to 16.6 feet this evening. It will then rise above flood stage tomorrow morning to 22.9 feet late tomorrow morning. It will fall below flood stage early tomorrow afternoon to 13.6 feet late Saturday evening. It will then rise to 13.9 feet early Sunday morning. It will fall again and remain below flood stage. - Flood stage is 22.0 feet. - Flood History...This crest compares to a previous crest of 22.7 feet on 01/18/2016. - http://www.weather.gov/safety/flood

Flood Advisory issued November 21 at 1:22PM PST until November 23 at 12:00PM PST by NWS Reno NV

* WHAT...Minor flooding is possible for the Susan River, small creeks and streams, and on or near recent burn scars. This does not include the Middle Fork of the Feather or the Pit River in Lassen County. * WHERE...A portion of northeast California, including the following counties, Lassen, Plumas and Sierra. * WHEN...Until noon PST Saturday. * IMPACTS...Minor flooding possible along low lying areas near the Susan River in and downstream of Susanville, as well as near other creeks, streams, urban areas. Rock and debris may cover roads especially near or below recent burn areas. * ADDITIONAL DETAILS... - At 112 PM PST, Rounds of high elevation snow and heavy rain are forecast today through Saturday morning before transitioning to snow. - Total rainfall amounts of 3 to 6 inches are expected over the area. The Susan River has been slow to rise as of Thursday afternoon, but additional rainfall may result in minor flooding. - Some locations that will experience flooding include... Eagle Lake, Termo, Herlong, Beckwourth, Doyle, Blairsden, Plumas Eureka State Park, Graeagle, Chilcoot, Bieber, Sierraville, Nubieber, Stampede Reservoir, Verdi, Susanville, Standish, Janesville, Aspen Grove Campground, Antelope Lake and Spaulding. - http://www.weather.gov/safety/flood For river forecast updates, visit cnrfc.noaa.gov

High Wind Warning issued November 21 at 1:09PM PST until November 22 at 4:00AM PST by NWS Eureka CA

* WHAT...South wind gusts up to 60 mph along the coast and up to 75 mph over the interior mountains. * WHERE...Del Norte County. * WHEN...From 9 PM this evening to 4 AM PST Friday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles.

Wind Advisory issued November 21 at 1:09PM PST until November 22 at 4:00AM PST by NWS Eureka CA

* WHAT...South wind gusts up to 50 mph. * WHERE...Mendocino Coast. * WHEN...Until 4 AM PST Friday. * IMPACTS...Wind gusts will be particularly strong along windward ridges and exposed coastal headlands. There is an increased risk of tree branches and other debris on roadways. Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

High Wind Warning issued November 21 at 1:09PM PST until November 22 at 4:00AM PST by NWS Eureka CA

* WHAT...South wind gusts up to 60 mph along the coast and up to 75 mph over the interior mountains. * WHERE...Humboldt County. * WHEN...From 9 PM this evening to 4 AM PST Friday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. Wind gusts will be particularly strong along windward ridges and exposed coastal headlands. There is an increased risk of tree branches and other debris on roadways.

Winter Storm Warning issued November 21 at 1:08PM PST until November 23 at 10:00PM PST by NWS Reno NV

* WHAT...Heavy snow for Mono County above 7000 feet. Snow accumulations of 10 to 18 inches with isolated amounts up to 2 feet. Ridge winds gusting as high as 85 mph. * WHERE...Mono County. * WHEN...From 4 PM Friday to 10 PM PST Saturday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Friday evening commute. Very strong winds could cause extensive damage to trees and power lines.

Winter Storm Warning issued November 21 at 1:08PM PST until November 23 at 10:00PM PST by NWS Reno NV

* WHAT...Heavy snow. Snow accumulations between 1 to 2 feet above 7,000 feet with 2 to 6 inches below 7,000 feet. Ridge winds gusting as high as 95 mph. * WHERE...Greater Lake Tahoe Area, and Lassen-Eastern Plumas-Eastern Sierra Counties. * WHEN...From 10 AM Friday to 10 PM PST Saturday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Friday evening commute. Very strong winds could cause extensive damage to trees and power lines. * ADDITIONAL DETAILS...For Lake Tahoe, lake winds may gust up to 50 mph on Friday and Friday night which will cause wave heights of 3 to 5 feet. Small boats, kayaks and paddle boards will be prone to capsizing and should remain off lake waters until conditions improve.

Flood Warning issued November 21 at 12:55PM PST until November 23 at 4:00AM PST by NWS Medford OR

* WHAT...Urban area and small stream flooding caused by rain and snowmelt continues. * WHERE...A portion of northern California, including the following county, Siskiyou. * WHEN...Until 400 AM PST Saturday. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring. * ADDITIONAL DETAILS... - At 1240 PM PST, radar, satellite and rain gauge data indicate heavy rain and snowmelt in the warned area. Over the past 18 hours, the snow level has risen to above 6000 feet, and heavy rains of up to several inches have fallen on top of two to three feet of new snow. As a result, flooding is imminent. - Additional rainfall amounts of 3 to 8 inches are possible in the warned area through Saturday. - Some locations that will experience flooding include... Mount Shasta, Weed, Dunsmuir, Pilgrim Creek Snow Park, Trout Creek Campground, Cattle Camp Campground, Fowlers Camp Campground And McCloud Falls, McCloud, Tennant, Mount Shasta Summit Plateau, Mount Shasta Ski Park Highway, Mount Shasta Bunny Flat Trail, Mcbride Springs Campground, Pondosa, Four Corners Snow Park, I 5 Black Butte Summit, Carrick, Edgewood, Medicine Lake Campground and Callahan. - http://www.weather.gov/safety/flood

Wind Advisory issued November 21 at 12:35PM PST until November 22 at 10:00PM PST by NWS San Francisco CA

* WHAT...South winds 15 to 30 mph with gusts up to 50 mph expected, locally higher gusts greater than 60 mph are possible above 2,500 feet. * WHERE...Coastal and higher elevation regions of the North Bay, the city of San Francisco, the East Bay and Santa Clara Hills, Santa Cruz Mountains and San Mateo, the Gabilan Range, the Santa Lucia Range, southern Monterey Bay, and coastal Big Sur. * WHEN...From 10 PM this evening to 10 PM PST Friday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. The combination of wind and moist soils will increase the risk for downed trees particularly across the North Bay. * ADDITIONAL DETAILS...A narrow frontal rain band is expected to develop Thursday night into Friday which will result in gusty south winds ahead of and during its passage. Winds will start to ease by late Friday after the frontal rain band has progressed out of the region. Moderate to heavy rains over the last 48 hours have saturated soils across the North Bay which will lead to increased risk of downed trees and power lines as gusty winds redevelop.

Winter Weather Advisory issued November 21 at 12:26PM PST until November 24 at 4:00AM PST by NWS Las Vegas NV

* WHAT...Snow expected above 7000 feet. Total snow accumulations 2 to 8 inches between 7000 and 8500 feet, higher totals up to 18 inches near the crest. Winds gusting as high as 55 mph near the crest. * WHERE...Eastern Sierra Slopes. * WHEN...From 4 PM Friday to 4 AM PST Sunday. * IMPACTS...Travel could be very difficult to impossible. Strong winds could cause tree damage.

Winter Storm Warning issued November 21 at 12:23PM PST until November 26 at 4:00PM PST by NWS Sacramento CA

* WHAT...Heavy snow expected for elevations above 5500 feet. Total snow accumulations of 1 to 3 feet and up to 4 feet along higher peaks. Winds gusting as high as 50 mph. * WHERE...West Slope Northern Sierra Nevada and Western Plumas County/Lassen Park Counties. * WHEN...From 4 PM Friday to 4 PM PST Tuesday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Friday evening and Monday morning commutes. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Snow levels Friday afternoon around 6000-7000 feet, lowering to around 4500-5500 feet over the weekend. A brief break in snowfall expected from late Saturday afternoon into Sunday morning with lighter snow showers.

Flood Advisory issued November 21 at 11:56AM PST until November 22 at 11:45AM PST by NWS Sacramento CA

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...A portion of northern California, including the following counties, Colusa, Glenn, Shasta and Tehama. * WHEN...Until 1145 AM PST Friday. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Water over roadways. Overflowing poor drainage areas. Rises along small streams and mainstem rivers. * ADDITIONAL DETAILS... - At 1148 AM PST, Doppler radar and automated rain gauges have indicated heavy rain. Emergency management and county highways have reported various road closures in the advisory area. Between 2 and 7 inches of rain have fallen in the last 36 hours, and more rainfall is forecast. - Some locations that will experience flooding include... Redding, Red Bluff, Corning, Orland, Willows, Elk Creek, Palo Cedro, Alder Springs, Yolla Bolly District Rs, Shasta Dam, Shingletown, Glenn, Shasta Lake, Anderson, Tehama, Rancho Tehama Reserve, Blossom, Flournoy, Henleyville and Paskenta. - http://www.weather.gov/safety/flood

Wind Advisory issued November 21 at 11:30AM PST until November 22 at 10:00AM PST by NWS Sacramento CA

* WHAT...Southeast winds 15 to 25 mph with gusts 40 to 50 mph expected. * WHERE...Central Sacramento Valley, Northeast Foothills/Sacramento Valley, and Northern Sacramento Valley. * WHEN...From 7 PM this evening to 10 AM PST Friday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. * ADDITIONAL DETAILS...Strongest winds expected early to mid morning Friday.

Winter Storm Warning issued November 21 at 10:33AM PST until November 21 at 10:00PM PST by NWS Eureka CA

* WHAT...Heavy snow expected above 3,500 feet. Additional snow accumulations between 1 and 2 feet. * WHERE...Northeastern Trinity. * WHEN...Until 10 PM PST this evening. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. The strong winds and weight of snow on tree limbs may down power lines and could cause sporadic power outages. Travel could be very difficult. * ADDITIONAL DETAILS...This includes highway 3 at Scott Mountain Pass.

Flood Watch issued November 21 at 9:42AM PST until November 22 at 10:00PM PST by NWS Eureka CA

A major atmospheric river storm is forecast to bring periods of heavy rain and the potential for life threatening flooding today through Friday. Small creeks and streams will continue to rapidly rise and may come out of their banks. The potential for extensive river flooding will increase tonight through Friday. Rivers will slowly drain Friday night and may continue to remain above flood stage through the day on Saturday, particularly on the Eel River at Fernbridge. * WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of northwest California, including Coastal Del Norte and Del Norte Interior. * WHEN...Through Friday evening. * IMPACTS...There will be an increased risk of rock and land slides along roadways. Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Low-water crossings may be flooded. Storm drains and ditches may become clogged with debris. Extensive street flooding and flooding of creeks and rivers are possible. Area creeks and streams are running high and could flood with more heavy rain. * ADDITIONAL DETAILS... - An additional 3 to 6 inches of rain is expected to fall today through Friday evening. The heaviest rain is expected tonight through early Friday morning. - http://www.weather.gov/safety/flood

Flood Watch issued November 21 at 9:42AM PST until November 22 at 10:00PM PST by NWS Eureka CA

A major atmospheric river storm is forecast to bring periods of heavy rain and the potential for life threatening flooding today through Friday. Small creeks and streams will continue to rapidly rise and may come out of their banks. The potential for extensive river flooding will increase tonight through Friday. Rivers will slowly drain Friday night and may continue to remain above flood stage through the day on Saturday, particularly on the Eel River at Fernbridge. * WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of northwest California, including the following areas, Northern Lake and Southern Lake. * WHEN...Through Friday evening. * IMPACTS...There will be an increased risk of rock and land slides along roadways. Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Low-water crossings may be flooded. Storm drains and ditches may become clogged with debris. Extensive street flooding and flooding of creeks and rivers are possible. Area creeks and streams are running high and could flood with more heavy rain. * ADDITIONAL DETAILS... - An additional 3 to 6 inches is expected today through Friday evening. Heaviest rain expected today through early Friday morning. - http://www.weather.gov/safety/flood

Flood Watch issued November 21 at 9:42AM PST until November 22 at 10:00PM PST by NWS Eureka CA

A major atmospheric river storm is forecast to bring periods of heavy rain and the potential for life threatening flooding today through Friday. Small creeks and streams will continue to rapidly rise and may come out of their banks. The potential for extensive river flooding will increase tonight through Friday. Rivers will slowly drain Friday night and may continue to remain above flood stage through the day on Saturday, particularly on the Eel River at Fernbridge. * WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of northwest California, including the Mendocino Coast, Northeastern Mendocino Interior, Northwestern Mendocino Interior, Southeastern Mendocino Interior and Southwestern Mendocino Interior. * WHEN...Through Friday evening. * IMPACTS...There will be an increased risk of rock and land slides along roadways. Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Low-water crossings may be flooded. Storm drains and ditches may become clogged with debris. Extensive street flooding and flooding of creeks and rivers are possible. Area creeks and streams are running high and could flood with more heavy rain. * ADDITIONAL DETAILS... - An additional 4 to 7 inches of rain is expected to fall today through Friday evening. The heaviest rain is expected today through early Friday morning. - http://www.weather.gov/safety/flood

Flood Watch issued November 21 at 9:42AM PST until November 22 at 10:00PM PST by NWS Eureka CA

A major atmospheric river storm is forecast to bring periods of heavy rain and the potential for life threatening flooding today through Friday. Small creeks and streams will continue to rapidly rise and may come out of their banks. The potential for extensive river flooding will increase tonight through Friday. Rivers will slowly drain Friday night and may continue to remain above flood stage through the day on Saturday, particularly on the Eel River at Fernbridge. * WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of northwest California, including the following area, Southern Trinity. * WHEN...Through Friday evening. * IMPACTS...There will be an increased risk of rock and land slides along roadways. Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Low-water crossings may be flooded. Storm drains and ditches may become clogged with debris. Extensive street flooding and flooding of creeks and rivers are possible. Area creeks and streams are running high and could flood with more heavy rain. * ADDITIONAL DETAILS... - An additional 3 to 6 inches of rain is expected to fall today through Friday evening. The heaviest rain is expected today through early Friday morning. - http://www.weather.gov/safety/flood

Flood Watch issued November 21 at 9:42AM PST until November 22 at 10:00PM PST by NWS Eureka CA

A major atmospheric river storm is forecast to bring periods of heavy rain and the potential for life threatening flooding today through Friday. Small creeks and streams will continue to rapidly rise and may come out of their banks. The potential for extensive river flooding will increase tonight through Friday. Rivers will slowly drain Friday night and may continue to remain above flood stage through the day on Saturday, particularly on the Eel River at Fernbridge. * WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of northwest California, including the Northern Humboldt Coast, Northern Humboldt Interior, Southern Humboldt Interior and Southwestern Humboldt. * WHEN...Through Friday evening. * IMPACTS...There will be an increased risk of rock and land slides along roadways. Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Low-water crossings may be flooded. Storm drains and ditches may become clogged with debris. Extensive street flooding and flooding of creeks and rivers are possible. Area creeks and streams are running high and could flood with more heavy rain. * ADDITIONAL DETAILS... - Additional rainfall of 3 to 7 inches is expected today through Friday evening. Locally higher amounts of 10 to 12 inches can be expected in the King Range. The heaviest rain is expected today through early Friday morning. - http://www.weather.gov/safety/flood

Flood Warning issued November 20 at 12:45PM PST until November 23 at 12:00AM PST by NWS Medford OR

* WHAT...Flooding caused by excessive rainfall and snow melt is expected. * WHERE...Portions of southwest Oregon, including Coos, Curry, Jackson, and Josephine counties and western Siskiyou County in northern California. * WHEN...Until midnight PST Friday Night. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is expected. * ADDITIONAL DETAILS... - At 1227 PM PST, satellite estimates and rain gauge data indicate heavy rain in the warned area. Between 1 and 6 inches of rain have fallen. - Additional rainfall amounts of 3 to 7 inches are possible in the warned area. Some areas will receive snowfall and then switch to rainfall. Rain can melt the snow and cause a higher runoff response than rainfall alone. - http://www.weather.gov/safety/flood