CALIFORNIA SNOW REPORT

* WHAT...Heavy snow possible. Total snow accumulations of 3 to 5 feet possible. Winds could gust as high as 55 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.

* 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 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...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.

* 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. 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...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...For the Small Craft Advisory, south winds 15 to 20 kt. For the Gale Warning, south winds 15 to 25 kt with gusts up to 30 kt expected. For the Storm Warning, southeast winds 30 to 40 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...For the Small Craft Advisory, until 9 AM PST this morning. For the Gale Warning, from 3 AM to 9 AM PST Tuesday. For the Storm Warning, 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 15 to 25 kt with gusts up to 35 kt expected. For the Storm Warning, southeast winds 35 to 45 kt with gusts up to 60 kt and seas 9 to 14 ft expected. * WHERE...Coastal Waters from Point Pinos to Point Piedras Blancas California out to 10 NM. * WHEN...For the Gale Warning, from 3 AM to 9 AM PST Tuesday. For the Storm Warning, 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...South winds 30 to 40 mph with gusts up to 60 mph possible. * WHERE...For the Coastal and Tehachapi Range 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 occurring * WHERE...Coastal southern Mendocino County. * Until 1000 AM PST Monday. * IMPACTS...Flooding along Highway 1 between Flumeville and Stornetta has caused road closure. * ADDITIONAL DETAILS... - At 103 AM PST, Flooding is already occurring. - Highway 1 between Flumeville and Stornetta - 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...Urban area and small stream flooding caused by excessive rainfall is expected. * WHERE...A portion of northern California, including the following county, Shasta. * WHEN...Until noon PST Monday. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is occuring. Low-water crossings are inundated with water and may not be passable. Expect many areas of slow moving or standing water. It will take several hours for all the water from these storms to work through local drainage systems in urban areas. Local media have reported water rescues. * ADDITIONAL DETAILS... - At 956 PM PST, local law enforcement reports flood impacts continue from heavy rain that has occurred on Sunday in Downtown Redding and adjacent urban areas. Between 3 and 7 inches of rain have fallen with periods of moderate to heavy rain to continue over the next several hours. - This includes the following streams and drainages... West Fork Stillwater Creek, Stillwater Creek, Sacramento River, Salmon Creek, Moody Creek, Olney Creek, Little Cow Creek, Clover Creek, Dry Creek, Old Cow Creek, Rock Creek, Churn Creek, Cow Creek, East Valley Creek, Boulder Creek, Deep Hole Creek, Pit River, Buckeye Creek, Spring Branch, Woodman Creek, Sulphur Creek, Tadpole Creek, Salt Creek, Bacon Creek, South Cow Creek, Clear Creek, East Fork Stillwater Creek and Bear Creek. - Some locations that will experience flooding include... Redding, Interstate 5, State Route 299, Palo Cedro, Shasta Lake, Anderson, Millville, Mountain Gate, Central Valley and Central Valley Cdp. - http://www.weather.gov/safety/flood

* WHAT...Southeast winds 25 to 35 mph with gusts up to 65 mph possible. * WHERE...Lake County, mainly over the higher terrain. * WHEN...From Tuesday evening through late Tuesday 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.

* WHAT...Southeast winds 25 to 35 mph with gusts up to 65 mph possible. * WHERE...Mendocino County mainly over the higher terrain and along the coast. * WHEN...From Tuesday evening through late Tuesday 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.

...The Flood Warning continues for the following rivers in California... Russian River near Hopland affecting Mendocino County. For the Russian River...including Hopland...Minor flooding is forecast. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Russian River near Hopland. * WHEN...Until Monday morning. * IMPACTS...At 18.0 feet, Flooding of Highway 222 near Ukiah. Secondary roads in low-lying areas will be flooded in the Hopland, Ukiah, and Talmage areas. * ADDITIONAL DETAILS... - At 8:45 PM PST Sunday the stage was 17.5 feet. - Bankfull stage is 21.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:45 PM PST Sunday was 17.5 feet. - Forecast...The river will rise to 17.9 feet just after midnight tonight. It will then fall below flood stage tomorrow morning and then to 6.2 feet early Tuesday morning. It will rise above flood stage late Tuesday evening to 17.2 feet Wednesday morning. It will then fall below flood stage again early Wednesday afternoon to 12.8 feet Wednesday evening. It will rise above flood stage again early Thursday morning to 16.0 feet Thursday afternoon. It will then fall below flood stage again early Friday morning. - Flood stage is 15.0 feet. - Flood History...This crest compares to a previous crest of 18.2 feet on 03/09/1995. - http://www.weather.gov/safety/flood

...The Flood Warning continues for the following rivers in California... Eel River at Fernbridge affecting Humboldt County. For the Eel River...including Fernbridge, Scotia, Bridgeville, Fort Seward, Miranda...Moderate flooding is forecast. * WHAT...Minor flooding is occurring and moderate flooding is forecast. * WHERE...Eel River at Fernbridge. * WHEN...Until Monday evening. * IMPACTS...At 24.0 feet, Minor flooding of Highway 211 to Ferndale south of Fernbridge. Much of the Eel Delta may be flooded, including areas northwest of Loleta and the western portion of Cannibal Island Road. Flooding will be enhanced for longer duration events. A Special Action Advisory is being issued to all owners of livestock in all low-lying areas adjacent to the Eel River. Appropriate action should be taken to protect livestock. * ADDITIONAL DETAILS... - At 8:15 PM PST Sunday the stage was 21.0 feet. - Bankfull stage is 20.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:15 PM PST Sunday was 21.0 feet. - Forecast...The river will rise to 23.6 feet late tonight. It will then fall below flood stage tomorrow afternoon to 10.6 feet Tuesday evening. It will rise to 18.5 feet Wednesday evening. It will then fall again and remain below flood stage. - Flood stage is 20.0 feet. - Flood History...This crest compares to a previous crest of 23.6 feet on 01/27/1983. - http://www.weather.gov/safety/flood

* 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.

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

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of southwest California, including the following area, Malibu Coast. * 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. * 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 San Luis Obispo, Santa Barbara, Ventura and Los Angeles counties. * 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. * 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