* WHAT...Heavy wet snow. Additional snow accumulations 2 to 5 inches. Winds gusting as high as 45 mph. * WHERE...Burney Basin / Eastern Shasta County, West Slope Northern Sierra Nevada, and Western Plumas County/Lassen Park Counties. * WHEN...Until 4 AM PST Thursday. * IMPACTS...Slick travel conditions expected, with snow covered roads and chain controls likely. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Snow levels 5000 to 6500 feet.

* WHAT...Heavy snow expected. Additional accumulations of 12 to 18 inches above 3500 feet, 4 to 6 inches between 2500 to 3500 feet and less than an inch below 2500 feet. Snow levels rising through this evening and overnight. * WHERE...Northeastern Trinity. * WHEN...Until 3 AM PST Thursday. * 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. Tire chains may be necessary if travelling through mountain passes. * ADDITIONAL DETAILS...This includes highway 3 in multiple areas north of Weaverville.

* WHAT...South winds 25 to 35 mph with gusts up to 65 mph possible. * WHERE...Del Norte County, and Humboldt County. * WHEN...From Thursday afternoon through late Thursday night. * IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel could 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.

A major atmospheric river storm is forecast to bring periods of heavy rain and the potential for life threatening flooding through Friday. Small creeks and streams will rapidly rise and may come out of their banks. The potential for extensive flooding will increase Thursday through Friday. * 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... - An additional 2 to 4 inches of rain is expected to fall today, with an additional 3 to 6 inches possible Thursday. An additional 12 inches of rain possible in the King Range by Friday. - http://www.weather.gov/safety/flood

A major atmospheric river storm is forecast to bring periods of heavy rain and the potential for life threatening flooding through Friday. Small creeks and streams will rapidly rise and may come out of their banks. The potential for extensive flooding will increase Thursday through Friday. * 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 3 to 5 inches of rain is expected to fall today, with an additional 3 to 7 inches possible Thursday. Rain expected to continue Friday into the weekend. - http://www.weather.gov/safety/flood

A major atmospheric river storm is forecast to bring periods of heavy rain and the potential for life threatening flooding through Friday. Small creeks and streams will rapidly rise and may come out of their banks. The potential for extensive flooding will increase Thursday through Friday. * 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 1 to 3 inches of rain is expected to fall today, then an additional 2 to 5 inches possible Thursday. Rain expected to continue Friday and over the weekend. - http://www.weather.gov/safety/flood

A major atmospheric river storm is forecast to bring periods of heavy rain and the potential for life threatening flooding through Friday. Small creeks and streams will rapidly rise and may come out of their banks. The potential for extensive flooding will increase Thursday through Friday. * 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... - 2 to 5 inches of rain is expected to fall today, with an additional 2 to 4 inches possible Thursday. Rain expected to continue Friday into the weekend. - http://www.weather.gov/safety/flood

A major atmospheric river storm is forecast to bring periods of heavy rain and the potential for life threatening flooding through Friday. Small creeks and streams will rapidly rise and may come out of their banks. The potential for extensive flooding will increase Thursday through Friday. * WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of northwest California, including Southern Trinity, with highest amounts expected to the southwest of South Fork Mtn. * 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 5 inches of rain is expected to fall today, with an additional 3 to 6 inches possible Thursday. Rain expected to continue Friday into the weekend. - http://www.weather.gov/safety/flood

...The Flood Watch is extended for the following rivers in California... Russian River near Hopland affecting Southeastern Mendocino Interior zone. Eel River at Fernbridge affecting Northern Humboldt Coast zone. For the Russian River...including Hopland...flooding is possible. For the Eel River...including Fernbridge...flooding is possible. * WHAT...Flooding is possible. * WHERE...Eel River at Fernbridge. * WHEN...From Thursday evening to late Saturday morning. * IMPACTS...At 20.0 feet, Significant flooding of the western portions of Cannibal Island Road, Camp Weott Road, the Salt and Old Rivers, and all adjacent low-lying areas. Flooding in these areas is exaggerated when crest timing is coincident with high tides and strong onshore winds, and for longer duration events. A Special Action Advisory is being issued to all owners of livestock in low-lying areas of the Eel Delta. Owners of livestock should consider taking appropriate action to protect livestock. At 22.0 feet, The western half of the Eel Delta may be completely flooded, especially if at or above this level for an extended period of time. This includes areas northwest of Loleta and Cannibal Island Road. A Special Action Advisory is being issued to all owners of livestock in low-lying areas of the Eel River Delta. Owners of livestock should take appropriate action to protect their animals. * ADDITIONAL DETAILS... - At 2:15 PM PST Wednesday the stage was 2.4 feet. - Forecast...Flood stage may be reached late tomorrow evening. - Flood stage is 20.0 feet. - http://www.weather.gov/safety/flood