« View county listFlash Flood Watch
Northern San Joaquin Valley-Motherlode-
West Slope Northern Sierra Nevada-
1205 PM PST Mon Feb 20 2017
...FLASH FLOOD WATCH IN EFFECT FROM 3 PM THIS AFTERNOON TO
MIDNIGHT PST TONIGHT...
The National Weather Service in Sacramento has issued a
* Flash Flood Watch for a portion of northern California...
including the following areas...Motherlode...Northern San
Joaquin Valley and West Slope Northern Sierra Nevada.
* From 3 PM this afternoon to midnight PST tonight
* Excessive heavy rainfall south of the Interstate 80 corridor is
anticipated to develop this afternoon and evening.
* Potential impacts include fast rises to rivers and streams, land
slides, fast flowing water over roadways, and washed out roads.
A Flash Flood Watch means that heavy rain may develop that lead
to flash flooding. Flash flooding is a VERY DANGEROUS SITUATION.
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
Colusa CA-Yolo CA-Sutter CA-Solano CA-Plumas CA-Alpine CA-Placer CA-
Shasta CA-Lassen CA-Amador CA-Tuolumne CA-Sacramento CA-Lake CA-
Stanislaus CA-San Joaquin CA-El Dorado CA-Calaveras CA-Tehama CA-
Butte CA-Glenn CA-Sierra CA-Yuba CA-Nevada CA-
959 AM PST SUN FEB 19 2017
...A FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS REMAINS IN
EFFECT UNTIL 400 PM PST THURSDAY FOR COLUSA...YOLO...SUTTER...
* Interior Northern California will experience another significant
uptick in flooding problems starting late tonight and continuing
through Monday night as an intense Atmospheric River type storm
* Our entire region has saturated soils and many flooded areas
already. This will enhance the impact of additional heavy rains
* Additional stress will be placed on levees, rivers, creeks, and
* We may see flooding in locations which haven't been impacted in
* We are strongly advising all residents in interior Northern
California to be prepared for flooding.
Be prepared to evacuate if flooding should affect your area. Gather
a "go bag" with important items like medications and hard to replace
documents. Do not forget to plan for you pets and animals.
Please never drive across flooded waters and roadways, especially
flowing water. Most people who are killed or injured during floods
are attempting to drive through flooded waters. Turn around, don't
LAT...LON 3725 12146 3810 12157 3808 12230 3832 12206
3884 12229 3867 12262 3907 12309 3950 12306
3955 12288 4033 12307 4058 12269 4117 12246
4118 12250 4118 12133 4059 12132 3835 11963
3776 11988 3780 12018 3713 12122
Carquinez Strait and Delta-Northern San Joaquin Valley-
Mountains Southwestern Shasta County to Northern Lake County-
Clear Lake/Southern Lake County-Motherlode-
Including the cities of Fairfield/Suisun, Stockton, Modesto,
Alder Springs, Lakeport, Grass Valley, and Jackson
618 PM PST Mon Feb 20 2017
...WIND ADVISORY IN EFFECT UNTIL 8 AM PST TUESDAY...
...HIGH WIND WARNING IS CANCELLED...
The National Weather Service in Sacramento has issued a Wind
Advisory, which is in effect until 8 AM PST Tuesday. The High
Wind Warning has been cancelled.
* TIMING...Strongest winds overnight.
* WINDS...Strongest sustained 20 to 35 mph overnight. Gusts 40 to
50 mph possible. Isolated stronger winds possible.
* IMPACTS...Local downed trees, blowing debris, and local power
A Wind Advisory means that winds of 35 mph are expected. Winds
this strong can make driving difficult, especially for high
profile vehicles. Use extra caution.
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$$Winter Storm Warning
Western Plumas County/Lassen Park-
West Slope Northern Sierra Nevada-
Including the cities of Chester, Quincy, and Blue Canyon
650 PM PST Mon Feb 20 2017
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 PM PST
* Main impacts: travelers may experience long delays. Chain
controls likely. Poor visibility due to snow and strong
southwest wind gusts to 60 mph will make travel hazardous.
Mudslides also possible across steeper terrain.
* Locations...Interstate 80 over Donner pass, Highway 50 over
Echo summit, Highway 88 over Carson pass, and Lassen park.
* Timing...Periods of heavy snow through Tuesday before dropping
off to lighter snow Tuesday night. Heaviest snowfall tonight and
* Snow amounts...Up to a foot of snow expected down to about 5500
feet with 2 to 5 feet of snow possible above 6000 feet through
* Snow levels...Snow levels around 6000 feet dropping on Tuesday
to between 4000 and 5000 feet.
A Winter Storm Warning for heavy snow means severe winter weather
conditions are expected or occurring. Significant amounts of
snow are forecast that will make travel dangerous. Only travel in
an emergency. If you must travel, keep an extra flashlight, food,
and water in your vehicle in case of an emergency. Strong winds
are also possible. This will make travel very hazardous or
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