CALIFORNIA SNOW REPORT

* WHAT...Heavy snow possible. Total snow accumulations of 3 to 5 feet possible. Winds could gust as high as 50 mph. * WHERE...A portion of central California. * WHEN...From Tuesday afternoon through Friday afternoon. * 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 Tuesday evening and Wednesday morning commutes. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Snow levels around 8,000 to 9,000 feet until Monday, then 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 6 to 8 feet. Winds could gust as high as 50 mph. * WHERE...Yosemite NP outside of the valley. * WHEN...Until 4 PM PST Friday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Monday morning and evening commutes. Strong winds could cause tree damage. * ADDITIONAL DETAILS...Snow levels around 8,000 to 9,000 feet until Monday, then 7,000 to 8,000 feet through Tuesday, and lowering to 6,000 feet by Christmas Day.

* 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...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...Mendocino and Lake counties. * WHEN...Through Monday morning. * 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. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - An atmospheric river will move into northwest California tonight through Sunday evening. Periods of moderate to heavy rain with rates of a quarter to a half inch an hour are possible. Total rain amounts of 3-6 inches are forecast. Rises in creeks and streams are likely and could result in minor flooding impacts. Flooding may occur in poor drainage and urban areas. - This may include Hwy 1 near the Garcia river north of Point Arena. - http://www.weather.gov/safety/flood

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of northwest California, including the following area, Northern Trinity. * WHEN...Through this 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. Area creeks and streams are running high and could flood with more heavy rain. * ADDITIONAL DETAILS... - totals of 2-4 inches and rainfall rates up to 0.5 inches or higher an hour are possible. Saturated soils and the heavy rainfall rates will increase the risk of minor flooding impacts. Rises in creeks and streams are likely. - http://www.weather.gov/safety/flood

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Humboldt County. * WHEN...Through this evening. * IMPACTS...There will be an increased risk of rock and land slides along roadways. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - An atmospheric river will move into northwest California tonight through Sunday evening. Periods of moderate to heavy rain with rates of a quarter to a half inch an hour are possible. Total rain amounts of 2-5 inches are forecast. Rises in creeks and streams are likely and could result in minor flooding impacts. Flooding may occur in poor drainage and urban areas. - http://www.weather.gov/safety/flood

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Southern Trinity County * WHEN...Through late tonight. * IMPACTS...There will be an increased risk of rock and land slides along roadways. * ADDITIONAL DETAILS... - An atmospheric river will move into northwest California tonight through Sunday evening. Periods of moderate to heavy rain with rates of a quarter to a half inch an hour are possible. Total rain amounts of 3-6 inches are forecast. Rises in creeks and streams are likely and could result in minor flooding impacts. Flooding may occur in poor drainage and urban areas. - http://www.weather.gov/safety/flood

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Del Norte County * WHEN...Through this 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. Area creeks and streams are running high and could flood with more heavy rain. * ADDITIONAL DETAILS... - A quick moving cold front will bring moderate to heavy rain to the area tonight into late Friday morning. Rainfall totals of 2-4 inches and rainfall rates up to 0.5 inches or higher an hour are possible. Saturated soils and the heavy rainfall rates will increase the risk of minor flooding impacts to low lying and urban areas. Rises in creeks and streams are likely. - http://www.weather.gov/safety/flood

...The National Weather Service in Eureka has issued a Flood Watch for the following rivers in California... Russian River near Hopland affecting Southeastern Mendocino Interior zone. For the Russian River...including Hopland...flooding is possible. * WHAT...Flooding is possible. * WHERE...Russian River near Hopland. * WHEN...From this morning to this evening. * IMPACTS...At 15.0 feet, Flooding of Highway 175 is expected at the approaches to the Russian River bridge. Expect flooding of cropland on the right bank of river. * ADDITIONAL DETAILS... - At 11:45 PM PST Saturday the stage was 2.9 feet. - Forecast...Flood stage may be reached late this morning. - Flood stage is 15.0 feet. - http://www.weather.gov/safety/flood

...The Flood Watch continues for the following rivers in California... Russian River near Hopland affecting Southeastern Mendocino Interior zone. For the Russian River...including Hopland...flooding is possible. * WHAT...Flooding is possible. * WHERE...Russian River near Hopland. * WHEN...From this morning to this evening. * IMPACTS...At 15.0 feet, Flooding of Highway 175 is expected at the approaches to the Russian River bridge. Expect flooding of cropland on the right bank of river. * ADDITIONAL DETAILS... - At 11:45 PM PST Saturday the stage was 2.9 feet. - Forecast...Flood stage may be reached late this morning. - Flood stage is 15.0 feet. - 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 Monday afternoon. * 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. * ADDITIONAL DETAILS... - Moderate to heavy rain associated with an atmospheric river will impact the region. 2-3" of rain is expected in the valleys during the watch period, with up to 6" in the coastal mountains. Area rivers, streams, and creeks that are prone to flooding could see rapid rises during and after heavy rainfall. There is a slight chance for flash flooding, particularly in urban areas Sunday and Monday. Debris flows are possible particularly for the Pickett Burn Scar. - http://www.weather.gov/safety/flood

A series of warm atmospheric rivers will bring moderate to heavy rain to the Valley, foothills, and mountains the week of Christmas. The prolonged period of rain will bring the risk of flooding to the Sacramento Valley, northern San Joaquin Valley, northern Sierra Nevada and adjacent foothills, as well as the Coastal Range. * 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, but do anticipate enhanced runoff in/below scars. - http://www.weather.gov/safety/flood