CALIFORNIA SNOW REPORT

* WHAT...Heavy snow expected. Accumulations up to a foot between 4500 to 5500 feet. 4 to 8 feet, with locally higher amounts above 5500 feet. Wind gusts up to 60 mph. * WHERE...West Slope Northern Sierra Nevada and Western Plumas County/Lassen Park Counties. * WHEN...From 10 PM Tuesday to 10 PM PST Friday. * IMPACTS...Dangerous travel conditions with chain controls and road closures. Localized tree damage, power outages, and low visibility due to the combination of heavy wet snow and strong winds. * ADDITIONAL DETAILS...Snow accumulations will remain near or above pass level through Tuesday, then drop to around 4500 to 5500 feet during the day Wednesday through Friday. Snowfall rates of 1 to 2 inches per hour at times.

* WHAT...Heavy snow expected. Snow accumulations of 1 to 3 feet above 4500 feet, with locally higher amounts at peaks. Up to 1 foot between 3500 to 4500 feet. Wind gusts up to 60 mph. * WHERE...Burney Basin / Eastern Shasta County, Mountains Southwestern Shasta County to Western Colusa County, and Shasta Lake Area / Northern Shasta County Counties. * WHEN...From 4 PM Wednesday to 10 PM PST Friday. * IMPACTS...Dangerous travel conditions with chain controls and road closures. Localized tree damage, power outages, and low visibility due to the combination of heavy wet snow and strong winds. * ADDITIONAL DETAILS...Snow levels will be above 5000 feet Wednesday, then drop to 3500 feet by Thursday night. Snowfall rates up to an inch per hour at times.

* WHAT...Heavy snow possible. Total snow accumulations between 1 to 2 feet possible. Winds could gust as high as 55 mph. * WHERE...Trinity County. * WHEN...From Wednesday afternoon through Friday evening. * IMPACTS...Roads will likely become slick and hazardous. Travel could be very difficult to impossible. Tire chains may be necessary if travelling through mountain passes.

* WHAT...Heavy snow possible. Total snow accumulations of 6 to 8 feet. Winds could gust as high as 55 mph. * WHERE...Yosemite NP outside of the valley. * WHEN...Until 10 PM PST Friday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Monday evening and Tuesday morning commutes. Strong winds could cause tree damage. * ADDITIONAL DETAILS...Snow levels around 7,000 to 8,000 feet through Tuesday, and lowering to 6,000 feet by Christmas Day.

* WHAT...Heavy snow possible. Total snow accumulations of 3 to 5 feet possible. Winds could gust as high as 55 mph. * WHERE...Sierra Nevada * WHEN...From 4 PM Tuesday to 10 PM PST Friday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Tuesday evening and Wednesday morning commutes. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Snow levels around 7,000 to 8,000 feet through Tuesday, and lowering to 6,000 feet by Christmas Day.

* WHAT...Southeast winds 30 to 40 mph with gusts up to 70 mph expected. Strongest winds over the ridges. * WHERE...Southern Humboldt. * WHEN...From 7 PM Tuesday to 8 AM PST Wednesday. * 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.

* WHAT...Southeast winds 30 to 40 mph with gusts from 50 to 70 mph expected. Strongest winds over the coastal headlands, exposed ridges and through gaps in the terrain. * WHERE...Mendocino County and Lake County. * WHEN...From 7 PM Tuesday to 6 AM PST Wednesday. * 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.

* WHAT...Southeast winds 25 to 35 kt with gusts up to 55 kt and seas 10 to 15 ft expected. * WHERE...Coastal Waters from Pigeon Point to Point Pinos California out to 10 NM. * WHEN...From 9 AM Tuesday to 3 AM PST Wednesday. * IMPACTS...Storm force winds and hazardous seas will capsize or damage vessels and reduce visibility.

* WHAT...Southeast winds 25 to 35 kt with gusts up to 55 kt and seas 12 to 17 ft expected. * WHERE...Waters from Pigeon Point to Point Pinos 10-60 NM. * WHEN...From 9 AM Tuesday to 3 AM PST Wednesday. * IMPACTS...Storm force winds and hazardous seas will capsize or damage vessels and reduce visibility.

* WHAT...Southeast winds 30 to 40 kt with gusts up to 55 kt and seas 11 to 16 ft expected. * WHERE...Waters from Point Pinos to Point Piedras Blancas 10- 60 NM. * WHEN...From 9 AM Tuesday to 3 AM PST Wednesday. * IMPACTS...Storm force winds and hazardous seas will capsize or damage vessels and reduce visibility.

* WHAT...Southeast winds 30 to 40 kt with gusts up to 60 kt and seas 8 to 13 ft expected. * WHERE...Coastal Waters from Point Pinos to Point Piedras Blancas California out to 10 NM. * WHEN...From 9 AM Tuesday to 3 AM PST Wednesday. * IMPACTS...Storm force winds and hazardous seas will capsize or damage vessels and reduce visibility.

* WHAT...Southeast winds 25 to 35 kt with gusts up to 50 kt and seas 10 to 15 ft expected. * WHERE...Coastal Waters from Point Reyes to Pigeon Point California out to 10 NM. * WHEN...From 9 AM Tuesday to 3 AM PST Wednesday. * IMPACTS...Storm force winds and hazardous seas will capsize or damage vessels and reduce visibility.

* WHAT...Southeast winds 25 to 35 kt with gusts up to 50 kt and seas 12 to 17 ft expected. * WHERE...Waters from Point Reyes to Pigeon Point 10-60 NM. * WHEN...From 9 AM Tuesday to 3 AM PST Wednesday. * IMPACTS...Storm force winds and hazardous seas will capsize or damage vessels and reduce visibility.

* WHAT...Southeast winds 25 to 35 kt with gusts up to 55 kt and seas 12 to 17 ft expected. * WHERE...Coastal Waters from Point Arena to Point Reyes California out to 10 NM. * WHEN...From 9 AM Tuesday to 3 AM PST Wednesday. * IMPACTS...Storm force winds and hazardous seas will capsize or damage vessels and reduce visibility.

* WHAT...Southeast winds 25 to 35 kt with gusts up to 50 kt and seas 13 to 18 ft expected. * WHERE...Waters from Point Arena to Point Reyes 10-60 NM. * WHEN...From 9 AM Tuesday to 3 AM PST Wednesday. * IMPACTS...Storm force winds and hazardous seas will capsize or damage vessels and reduce visibility.

* WHAT...For the Gale Warning, southeast winds 25 to 35 kt with gusts up to 45 kt and seas 9 to 11 feet expected. For the Storm Warning, south winds 30 to 40 kt with gusts up to 55 kt and seas 12 to 17 feet expected. For the Small Craft Advisory, east winds 15 to 25 kt with gusts up to 35 kt and seas 8 to 11 feet expected. * WHERE...Cape Mendocino to Pt Arena out 10 nm and Cape Mendocino to Pt Arena 10 to 60 nm. * WHEN...For the Gale Warning, from 6 PM to 10 PM PST Tuesday. For the Storm Warning, from 10 PM Tuesday to 6 AM PST Wednesday. For the Small Craft Advisory, from 1 PM to 6 PM PST Tuesday. * IMPACTS...Very strong winds will cause hazardous seas which could capsize or damage vessels and reduce visibility.

...The Flood Warning continues for the following rivers in California... Eel River at Fernbridge affecting Humboldt County. For the Eel River...including Fernbridge...Minor flooding is forecast. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Eel River at Fernbridge. * WHEN...Until this evening. * 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. * ADDITIONAL DETAILS... - At 1:15 PM PST Monday the stage was 21.6 feet. - Bankfull stage is 20.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 1:15 PM PST Monday was 23.9 feet. - Forecast...The river will fall below flood stage late this afternoon to 11.0 feet tomorrow evening. It will then rise to 18.2 feet Wednesday evening. It will fall to 15.0 feet early Thursday afternoon then rise again. - Flood stage is 20.0 feet. - Flood History...This crest compares to a previous crest of 21.8 feet on 01/14/1995. - http://www.weather.gov/safety/flood

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of northern California, including the following areas, the Sacramento Valley, northern San Joaquin Valley, Delta region, Sierra Nevada and adjacent foothills, and Coastal Range. * WHEN...Through Friday afternoon. * IMPACTS...Excessive runoff will result in rises along area rivers, creeks, streams. Small streams and creeks may rise out of their banks. Flooding may occur in low-lying, poor drainage, and urban areas. Mudslides and rockslides may occur in mountain and foothill areas. * ADDITIONAL DETAILS... - Periods of moderate to heavy rain are forecast the week of Christmas. Debris flows are not expected over recent burn scars in northern California, but do anticipate enhanced runoff in/below scars. - http://www.weather.gov/safety/flood

...The Flood Warning continues 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 occurring and minor flooding is forecast. * WHERE...Sacramento River at Tehama Bridge. * WHEN...Until further notice. * IMPACTS...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. * ADDITIONAL DETAILS... - At 1:00 PM PST Monday the stage was 209.9 feet. - Bankfull stage is 206.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 1:00 PM PST Monday was 210.1 feet. - Forecast...The river will fall below flood stage this afternoon to 205.3 feet late tonight. It will then rise above flood stage early Wednesday morning to 209.9 feet Wednesday morning. It will fall to 209.6 feet late Wednesday morning then rise again. - Flood stage is 209.5 feet. - Flood History...This crest compares to a previous crest of 210.1 feet on 12/29/2010. - http://www.weather.gov/safety/flood

* WHAT...Southeast winds 25 to 35 kt with gusts up to 55 kt and combined seas 10 to 15 ft possible when conditions are worst. * WHERE...Portions of the coastal waters of southwest California. * WHEN...For the Small Craft Advisory, from 4 AM to 1 PM PST Tuesday. For the Storm Watch, from Tuesday afternoon through late Tuesday night. * IMPACTS...Potentially very strong winds may create exceptionally dangerous sea conditions which could capsize or damage vessels of all sizes. * ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX) for more.

* WHAT...South winds 20 to 30 mph with gusts up to 60 mph possible. * WHERE...The Bay Area, The Central Coast, The Santa Clara Valley and Eastern Hills, The Salinas and Carmel Valleys and Hollister Area, The Santa Cruz Mountains, and San Francisco Peninsula Coast. * WHEN...From Tuesday evening through early Wednesday morning. * IMPACTS...Damaging winds could down trees, snap power lines, and result in property damage. Widespread power outages are possible. Travel could be extremely difficult and hazardous, especially for high profile vehicles. The combination of wind and moist soils will increase the risk for downed trees.

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of Southwest California, including the following areas, San Diego County Coastal Areas, San Diego County Deserts, San Diego County Mountains and San Diego County Valleys. * WHEN...From late Tuesday night through late Wednesday night. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - An Atmospheric River will likely bring widespread moderate to heavy rain to the area Wednesday. Heaviest most widespread rain is expected late Wednesday morning continuing through the evening for the mountains and deserts. Peak rainfall rates of 0.50 to 1 inch per hour are expected. Scattered locally heavy showers could continue into Thursday but impacts from any additional rain are expected to be more localized. - https://www.weather.gov/safety/flood

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of Southwest California, including the following areas, Apple and Lucerne Valleys, Coachella Valley, Orange County Coastal Areas, Orange County Inland Areas, Riverside County Mountains, San Bernardino County Mountains, San Bernardino and Riverside County Valleys-The Inland Empire, San Gorgonio Pass near Banning and Santa Ana Mountains and Foothills. * WHEN...From Tuesday afternoon through Wednesday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Mud and debris flow are possible near and in burn scars, including the Airport, Bridge and Line burn scars. * ADDITIONAL DETAILS... - An Atmospheric River will likely bring widespread moderate to heavy rain to the region late Tuesday through Wednesday. Showers could begin to develop as early as Tuesday evening, especially in the mountains. Heaviest and most widespread rain is expected Wednesday morning continuing through the afternoon in the Coachella Valley and in the mountains. Peak rainfall rates of 0.50 to 1 inch per hour are expected. There is a potential for locally heavier hourly rainfall rates to develop with convection embedded in the main rain band or in thunderstorms after the main band passes. Scattered locally heavy showers could continue into Thursday but impacts from any additional rain are expected to be more localized. -Snow levels are expected to remain above 8000 ft during period of heaviest precipitation bringing a heightened risk of mud slides, debris flow, and areas of flash flooding in the San Bernardino county mountains. - https://www.weather.gov/safety/flood

* WHAT...South winds 20 to 30 mph with gusts 45 to 65 mph possible in the High Desert. Winds 30 to 40 mph with gusts 60 to 70 in the mountains, locally up to 80 mph possible on the desert slopes of the mountains. * WHERE...Apple and Lucerne Valleys and San Bernardino County Mountains. * WHEN...From Tuesday afternoon through Thursday afternoon. * IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel could be difficult, especially for high profile vehicles.

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...For the Malibu Coast. * WHEN...From Tuesday afternoon through Thursday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Mud and debris flows will be possible across foothill and mountain areas, including recent burn scars. * ADDITIONAL DETAILS... - A moderate to strong atmospheric river will impact Southwestern California Tuesday through Wednesday. Heavy rainfall is expected with high rainfall rates. So, widespread urban flooding will be possible along with mud and debris flows across all foothills and mountain areas. - http://www.weather.gov/safety/flood

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...For all areas of San Luis Obispo, Santa Barbara, Ventura and Los Angeles counties. * WHEN...From Tuesday afternoon through Thursday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Mud and debris flows will be possible across foothill and mountain areas, including recent burn scars. * ADDITIONAL DETAILS... - A moderate to strong atmospheric river will impact Southwestern California Tuesday through Thursday. Heavy rainfall is expected with high rainfall rates. So, widespread urban flooding will be possible along with mud and debris flows across all foothills and mountain areas. - http://www.weather.gov/safety/flood

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...San Francisco County, San Mateo Peninsula, East Bay, South Bay, and Central Coast * WHEN...From Tuesday morning through Friday evening. * IMPACTS...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. Low water crossings may become flooded. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - A series of atmospheric rivers will result in multiple rounds of moderate to heavy rainfall this week across the Bay Area and Central Coast. An additional 2-4" of rain is expected across the interior with locally higher totals between 4-6" across the Santa Cruz Mountains and up to 8" across the Santa Lucia Range. Flooding potential will increase with each successive round of rain. Sharp rises in smaller creeks and streams are expected with at least some potential for minor flooding in mainstream rivers. - http://www.weather.gov/safety/flood

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Northern San Francisco Bay Area (Napa, Sonoma, and Marin counties). * WHEN...Through Friday evening. * IMPACTS...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. Low water crossings may become flooded. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Multiple rounds of moderate to heavy rainfall are expected across the North Bay this week. An additional 6-8" is possible over the North Bay Mountains and 4-5" over the North Bay Valleys by Friday. Nuisance flooding will increase throughout the week with sharp rises in smaller creeks and minor flooding along some of the mainstream rivers (Russian River, Napa River). Debris flows are possible particularly for the Pickett Burn Scar. - http://www.weather.gov/safety/flood

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of central California, including the following areas, Bakersfield, Buena Vista, Buttonwillow - Lost Hills - I5, Caruthers - San Joaquin - Selma, Coalinga - Avenal, Delano-Wasco-Shafter, Frazier Mountain Communities, Fresno-Clovis, Fresno-Tulare Foothills, Fresno-Tulare Lower Sierra, Grant Grove Area, Grapevine, Hanford - Corcoran - Lemoore, Indian Wells Valley, Kaiser to Rodgers Ridge, Kern River Valley, Kings Canyon NP, Los Banos - Dos Palos, Mariposa Madera Foothills, Merced - Madera - Mendota, Mojave Desert, Mojave Desert Slopes, Piute Walker Basin, Planada - Le Grand - Snelling, Sequoia NP, South End San Joaquin Valley, South End Sierra Foothills, South End of the Lower Sierra, South End of the Upper Sierra, Southeast San Joaquin Valley, Tehachapi, Visalia - Porterville - Reedley, West Side Mountains South of 198, West Side Mountains north of 198 and West Side of Fresno and Kings Counties. * WHEN...From Tuesday afternoon through Friday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. Low-water crossings may be flooded. * ADDITIONAL DETAILS... - http://www.weather.gov/safety/flood

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of central California, including the following areas, Mariposa-Madera Lower Sierra, San Joaquin River Canyon, Upper San Joaquin River, Yosemite NP outside of the valley and Yosemite Valley. * WHEN...Through Friday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Low-water crossings may be flooded. * ADDITIONAL DETAILS... - http://www.weather.gov/safety/flood

* WHAT...South winds 25 to 35 mph with gusts up to 60 mph possible. * WHERE...Carquinez Strait and Delta, Sacramento Valley, Motherlode, Northeast Foothills, and Northern San Joaquin Valley. * WHEN...From Tuesday afternoon through Friday afternoon. * IMPACTS...Strong winds and saturated soils could blow down trees and power lines resulting in widespread power outages. Strong winds may cause impacts to unsecured items, including temporary structures and holiday decorations. Travel could be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...Strongest wind gusts expected in the northern Sacramento Valley and adjacent foothills on Wednesday.

* WHAT...South winds 30 to 40 mph with gusts up to 60 mph possible. * WHERE...A portion of central California. * WHEN...From Tuesday afternoon through Thursday afternoon. * IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel could be difficult, especially for high profile vehicles.

* WHAT...Flooding caused by excessive rainfall is possible. * WHERE...Del Norte County, Humboldt County, Trinity County, Mendocino County, and Lake County. * WHEN...From this evening 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. Area creeks and streams are running high and could flood with more heavy rain. * ADDITIONAL DETAILS... - Additional rounds of heavy rain are likely again starting tonight and continuing through Friday night. An additional 4-8 inches of total precipitation is possible through Friday. There will be breaks in the heavy precipitation, but heavy rain falling on already saturated ground will promote flooding impacts. Additional precipitation amounts of 4-8 inches are possible through Friday. - http://www.weather.gov/safety/flood

* WHAT...South winds 30 to 50 mph with gusts up to 80 mph possible. Strongest in the mountains. * WHERE...A portion of southwest California. * WHEN...From Tuesday afternoon through Thursday afternoon. * IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel could be difficult, especially for high profile vehicles.