Dense Fog Advisory
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...Central Sacramento Valley, Northern San Joaquin Valley,
and Southern Sacramento Valley.
* WHEN...Until noon PST today.
* IMPACTS...Low visibility could make driving conditions hazardous.
From: Jan 22, 2026 15:16
Until: Jan 22, 2026 20:00
Dense Fog Advisory
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...Carquinez Strait and Delta, Central and Southern
Sacramento Valley, and Northern San Joaquin Valley.
* WHEN...Until noon PST Tuesday.
* IMPACTS...Low visibility could make driving conditions hazardous.
From: Jan 20, 2026 04:52
Until: Jan 20, 2026 20:00
Dense Fog Advisory
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...Carquinez Strait and Delta, Sacramento Valley, and
Northern San Joaquin Valley.
* WHEN...Until noon PST today.
* IMPACTS...Low visibility could make driving conditions hazardous.
From: Jan 20, 2026 10:21
Until: Jan 20, 2026 20:00
Dense Fog Advisory
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...Carquinez Strait and Delta, Central Sacramento Valley,
Northern San Joaquin Valley, and Southern Sacramento Valley.
* WHEN...Until noon PST today.
* IMPACTS...Low visibility could make driving conditions hazardous.
From: Jan 19, 2026 11:01
Until: Jan 19, 2026 20:00
Dense Fog Advisory
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...Carquinez Strait and Delta, Central and Southern
Sacramento Valley, and Northern San Joaquin Valley.
* WHEN...Until noon PST Monday.
* IMPACTS...Low visibility could make driving conditions hazardous.
From: Jan 19, 2026 04:34
Until: Jan 19, 2026 20:00
Lake Wind Advisory
* WHAT...West winds 15 to 25 mph with gusts up to 40 mph and waves 2
to 4 feet for Lake Tahoe.
* WHERE...Greater Lake Tahoe Area.
* WHEN...From 8 PM this evening to 7 AM PST Thursday.
* IMPACTS...Small boats, kayaks and paddle boards will be prone to
capsizing and should remain off lake waters until conditions
improve.
From: Jan 07, 2026 09:01
Until: Jan 08, 2026 15:00
Winter Storm Warning
* WHAT...Heavy snow. Additional snow accumulations of 1 to 2 feet
above 7000 feet with up to 3 feet locally on highest peaks. Snow
accumulations of 4 to 12 inches at lake level with up to 16 inches
for communities along and west of Highway 89. Wind gusts of 25 to
40 mph with ridgetop winds gusting over 70 mph at times. Wind
gusts up to 40 mph and wave heights of 1 to 3 feet on Lake Tahoe.
* WHERE...Greater Lake Tahoe Area.
* WHEN...Until 10 AM PST Monday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions will impact weekend travel and the Monday
morning commute in and across the Sierra. Strong winds could cause
damage to trees and power lines.
From: Jan 04, 2026 08:51
Until: Jan 05, 2026 18:00
Flood Watch
* WHAT...Flooding caused by excessive rainfall continues to be
possible. Additional rainfall of 1 to 3 inches is expected below
4000 ft, highest in the foothills.
* WHERE...A portion of northern California below 4000 feet in
elevation, including the following areas, Sacramento Valley,
Motherlode, Mountains Southwestern Shasta County to Western Colusa
County, Northeast foothills, and Shasta Lake Area / Northern
Shasta County.
* WHEN...Through Monday 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...
- http://www.weather.gov/safety/flood
From: Jan 04, 2026 07:55
Until: Jan 05, 2026 00:15
Winter Storm Warning
* WHAT...Heavy snow expected above 5000 feet. Additional snow
accumulations of 4 to 8 inches above 4500 feet. 1 to 2 feet above
5000 feet, and 2 to 4 feet above 6000 feet. Locally higher amounts
over the highest peaks. Winds gusting as high as 55 mph.
* WHERE...West Slope Northern Sierra Nevada and Western Plumas
County/Lassen Park above 5000 feet.
* WHEN...Until 4 PM PST Monday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact weekend travel and the Monday
morning commute. Strong winds could cause tree damage.
* ADDITIONAL DETAILS...Snow levels around 5000 to 6000 on Sunday,
lowering further to around 4000 to 5000 feet by early Monday
morning. Heaviest snow expected on Sunday.
From: Jan 04, 2026 07:53
Until: Jan 05, 2026 00:15
Flood Watch
An Atmospheric River Event will bring moderate to heavy rain this
weekend through Monday evening. The prolonged period of rain will
bring the risk of flooding to the Sacramento Valley, Shasta County,
northern Sierra Nevada and adjacent foothills, as well as the
Coastal Range. This will be for elevations below 4000 feet.
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northern California below 4000 feet in
elevation, including the following areas, Sacramento Valley,
Motherlode, Mountains Southwestern Shasta County to Western Colusa
County, Northeast foothills, and Shasta Lake Area / Northern
Shasta County.
* WHEN...Through Monday 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...
- http://www.weather.gov/safety/flood
From: Jan 03, 2026 18:32
Until: Jan 05, 2026 00:00
Winter Storm Warning
* WHAT...Heavy snow expected. Total snow accumulations of 6 to 10
inches above 4500 feet. 1 to 3 feet above 5000 feet, and 3 to 5
feet above 6000 feet. Locally higher amounts at highest peaks.
Winds gusting as high as 55 mph.
* WHERE...West Slope Northern Sierra Nevada and Western Plumas
County/Lassen Park Counties.
* WHEN...Until 4 PM PST Monday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact this evening through Monday
morning commutes. Strong winds could cause tree damage.
* ADDITIONAL DETAILS...Snow levels will continue to lower to 5000 to
6000 feet this afternoon and Sunday, and further to around 4500 to
5000 feet by early Monday morning. Heaviest snow expected on
Sunday.
From: Jan 03, 2026 18:44
Until: Jan 05, 2026 00:00
Flood Advisory
* WHAT...Flooding caused by excessive rainfall continues.
* WHERE...Portions of central and northern California, including the
following counties, in central California, Placer. In northern
California, Amador, Calaveras, El Dorado, Nevada, Sacramento, San
Joaquin, Solano, Sutter and Yolo.
* WHEN...Until 300 PM PST.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Water over roadways. Ponding of water in urban or other areas is
occurring or is imminent.
* ADDITIONAL DETAILS...
- At 1009 AM PST, Doppler radar indicated heavy rain.
Overflowing poor drainage areas will cause minor flooding in
the advisory area. Between 0.5 and 2 inches of rain have
fallen.
- Some locations that will experience flooding include...
Sacramento, Stockton, Elk Grove, Roseville, Citrus Heights,
Folsom, Davis, Rocklin, Woodland, Galt, Auburn, Placerville,
Jackson, Fair Oaks, Carmichael, El Dorado Hills, Cameron
Park, Paloma, Rancho Cordova and Lodi.
- http://www.weather.gov/safety/flood
From: Jan 04, 2026 18:10
Until: Jan 04, 2026 23:00
Winter Storm Warning
* WHAT...Heavy snow. Additional snow accumulations of 1 to 2 feet
above 7000 feet with up to 3 feet locally on highest peaks. Snow
accumulations of 4 to 12 inches at lake level with up to 16 inches
for communities along and west of Highway 89. Wind gusts of 35 to
45 mph with ridgetop winds gusting over 100 mph at times. Wind
gusts up to 40 mph and wave heights of 1 to 3 feet on Lake Tahoe.
* WHERE...Greater Lake Tahoe Area.
* WHEN...Until 10 AM PST Monday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions will impact weekend travel and the Monday
morning commute in and across the Sierra. Strong winds could cause
damage to trees and power lines.
From: Jan 03, 2026 21:22
Until: Jan 04, 2026 21:45
Avalanche Watch
AVAREV
The following message is transmitted at the request of the U.S.
Forest Service Sierra Avalanche Center.
The Sierra Avalanche Center in Truckee has issued a BACKCOUNTRY
AVALANCHE WATCH for the following areas: NWS Reno NV - NVZ002
(Greater Lake Tahoe)...CAZ072 (Greater Lake Tahoe (CA))
* WHAT...HIGH avalanche danger may occur in the backcountry starting
late Saturday afternoon or evening, potentially lasting through
Sunday night.
* WHERE...Central Sierra Nevada Mountains between Yuba Pass (Hwy 49)
on the north and Ebbetts Pass (Hwy 4) on the south, including
the greater Lake Tahoe area. This applies only backcountry
areas, not to ski areas and highways where avalanche mitigation
programs exist.
* WHEN...In effect from Sat 15:00 PST to Sun 05:00 PST.
* IMPACTS...A powerful storm with rapidly accumulating snowfall and
strong winds may cause widespread avalanche activity in the
mountains. Large avalanches capable of burying or injuring
people could occur in backcountry areas.
* PRECAUTIONARY / PREPAREDNESS ACTIONS...Very dangerous avalanche
conditions could occur in the backcountry. Traveling in, near,
or below backcountry avalanche terrain during HIGH avalanche
danger is not recommended.
Consult https://www.sierraavalanchecenter.org/ or www.avalanche.org
for more detailed information.
Similar avalanche danger may exist at locations outside the coverage
area of this or any avalanche center.
From: Jan 03, 2026 16:24
Until: Jan 04, 2026 16:30
Avalanche Watch
AVAREV
The following message is transmitted at the request of the
Eastern Sierra Avalanche Center.
BACKCOUNTRY AVALANCHE WATCH
IMMEDIATE BROADCAST REQUESTED
07:00 PST Sat Jan 03 2026
The Eastern Sierra Avalanche Center in Mammoth Lakes has issued a BACKCOUNTRY AVALANCHE WATCH for the following areas:
NWS Las Vegas NV - CA-519 (Eastern Sierra in Inyo County)
NWS Reno NV - CA-073 (Eastern Sierra in Mono County)
* WHAT...The avalanche danger is expected to rise to HIGH through today. Dangerous avalanche conditions are expected to continue into tomorrow.
* WHERE...The eastern slopes of the Sierra Nevada mountain range between Virginia Lakes to the north and Bishop Creek to the south.
* WHEN...In effect from Sat 07:00 PST to Sun 07:00 PST.
* IMPACTS...Heavy snowfall combined with strong to extreme winds will likely create widespread areas of unstable snow.
* PRECAUTIONARY / PREPAREDNESS ACTIONS...Very dangerous avalanche conditions are expected to develop within the next 24 hours. Avalanches may run long distances, into mature forests, valley floors, or flat terrain.
Consult http://www.esavalanche.org/ or www.avalanche.org for more detailed information.
Similar avalanche danger may exist at locations outside the coverage area of this or any avalanche center.
From: Jan 03, 2026 14:21
Until: Jan 04, 2026 15:00
Wind Advisory
* WHAT...South winds 15 to 25 mph with gusts 35 to 45 mph expected.
* WHERE...Northern / Central Sacramento Valley and Northeast
Foothills.
* WHEN...Until 4 AM PST Sunday.
* IMPACTS...Gusty winds will blow around unsecured objects and
winter decorations. Tree limbs could be blown down and a few power
outages may result.
* ADDITIONAL DETAILS...Strongest winds are generally expected from
Chico northward.
From: Jan 03, 2026 18:35
Until: Jan 04, 2026 12:00
Winter Storm Warning
* WHAT...Heavy snow. Snow accumulations of 1 to 3 feet above 7000
feet with 4 to 12 inches at lake level. Wind gusts of 35 to 45 mph
with ridgetop winds gusting over 100 mph at times. Wind gusts up
to 40 mph and wave heights of 1 to 3 feet on Lake Tahoe.
* WHERE...Greater Lake Tahoe Area.
* WHEN...Until 10 AM PST Monday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions will impact weekend travel and the Monday
morning commute in and across the Sierra. Strong winds could cause
damage to trees and power lines.
From: Jan 03, 2026 09:56
Until: Jan 04, 2026 00:00
Winter Storm Warning
* WHAT...Heavy snow expected above 5000 feet. Total snow
accumulations of 1 to 2 feet above 5000 feet, with 2 to 5 feet
above 6000 feet. Locally higher amounts at highest peaks. Winds
gusting as high as 55 mph.
* WHERE...West Slope Northern Sierra Nevada and Western Plumas
County/Lassen Park Counties.
* WHEN...From 10 PM this evening to 4 PM PST Monday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact this evening through Monday
morning commutes. Strong winds could cause tree damage.
* ADDITIONAL DETAILS...Snow levels 6500-7500 feet tonight into
Saturday morning, lowering to 5000 to 6000 feet Saturday afternoon
into Sunday, and further to around 4500 to 5500 feet by early
Monday morning. Heaviest snow expected on Sunday.
From: Jan 02, 2026 18:43
Until: Jan 04, 2026 00:00
Flood Watch
An Atmospheric River Event will bring moderate to heavy rain this
evening through Monday evening. The prolonged period of rain will
bring the risk of flooding to the Sacramento Valley, Shasta County,
northern Sierra Nevada and adjacent foothills, as well as the
Coastal Range. This will be for elevations below 4000 feet.
* WHAT...Flooding caused by excessive rainfall is possible.
* WHERE...A portion of northern California below 4000 feet in
elevation, including the following areas, Sacramento Valley,
Motherlode, Mountains Southwestern Shasta County to Western Colusa
County, Northeast Foothills, and Shasta Lake Area / Northern
Shasta County.
* WHEN...From this evening through Monday 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...
- http://www.weather.gov/safety/flood
From: Jan 02, 2026 17:25
Until: Jan 04, 2026 00:00
Wind Advisory
* WHAT...South winds 15 to 25 mph with gusts 35 to 45 mph expected.
* WHERE...Northern / Central Sacramento Valley and Northeast
Foothills.
* WHEN...From 10 PM this evening to 4 AM PST Sunday.
* IMPACTS...Gusty winds will blow around unsecured objects and
winter decorations. Tree limbs could be blown down and a few power
outages may result.
* ADDITIONAL DETAILS...Strongest winds are generally expected from
Chico northward.
From: Jan 02, 2026 18:38
Until: Jan 04, 2026 00:00
Dense Fog Advisory
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...Carquinez Strait and Delta, Northern San Joaquin Valley,
and Southern Sacramento Valley.
* WHEN...Until 1 PM PST this afternoon.
* IMPACTS...Low visibility could make driving conditions hazardous.
* ADDITIONAL DETAILS...Dense fog continues to be observed this
morning in the central/southern Sacramento Valley and northern San
Joaquin Valley.
From: Dec 29, 2025 18:09
Until: Dec 29, 2025 21:00
Dense Fog Advisory
* WHAT...For the Dense Fog Advisory, visibility one quarter mile or
less in dense fog. For the Frost Advisory, temperatures as low as
33 to 36 degrees will result in frost formation.
* WHERE...Carquinez Strait and Delta, Northern San Joaquin Valley,
and Southern Sacramento Valley.
* WHEN...For the Dense Fog Advisory, until 11 AM PST Monday. For the
Frost Advisory, until 9 AM PST Monday.
* IMPACTS...Low visibility could make driving conditions hazardous.
Frost could harm sensitive outdoor vegetation, especially if left
uncovered.
* ADDITIONAL DETAILS...Frost formation may be inhibited by northerly
flow along and west of Interstate 5, or in areas where fog forms
early on in the night.
From: Dec 29, 2025 07:31
Until: Dec 29, 2025 19:00
Frost Advisory
* WHAT...For the Dense Fog Advisory, visibility one quarter mile or
less in dense fog. For the Frost Advisory, temperatures as low as
33 to 36 degrees will result in frost formation.
* WHERE...Carquinez Strait and Delta, Northern San Joaquin Valley,
and Southern Sacramento Valley.
* WHEN...For the Dense Fog Advisory, until 11 AM PST Monday. For the
Frost Advisory, until 9 AM PST Monday.
* IMPACTS...Low visibility could make driving conditions hazardous.
Frost could harm sensitive outdoor vegetation, especially if left
uncovered.
* ADDITIONAL DETAILS...Frost formation may be inhibited by northerly
flow along and west of Interstate 5, or in areas where fog forms
early on in the night.
From: Dec 29, 2025 07:31
Until: Dec 29, 2025 19:00
Frost Advisory
* WHAT...Temperatures as low as 33 to 36 degrees will result in
frost formation.
* WHERE...Elevations below 2,000 feet in the Motherlode, Carquinez
Strait and Delta, Central and Southern Sacramento Valley, and
Northern San Joaquin Valley.
* WHEN...From 1 AM to 9 AM PST Monday.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
* ADDITIONAL DETAILS...Frost formation may be inhibited by northerly
flow along and west of Interstate 5, or in areas where fog forms
early on in the night.
From: Dec 28, 2025 19:11
Until: Dec 29, 2025 17:00
Frost Advisory
* WHAT...Temperatures as low as 33 to 36 degrees will result in
frost formation.
* WHERE...Elevations below 2000 feet in the Central Sacramento
Valley and Motherlode.
* WHEN...Until 9 AM PST Monday.
* IMPACTS...Low visibility could make driving conditions hazardous.
Frost could harm sensitive outdoor vegetation, especially if left
uncovered.
* ADDITIONAL DETAILS...Frost formation may be inhibited by northerly
flow along and west of Interstate 5, or in areas where fog forms
early on in the night.
From: Dec 29, 2025 07:31
Until: Dec 29, 2025 17:00
Winter Storm Warning
* WHAT...Heavy snow. Additional snow accumulations of 8 to 12 inches
above 4500 feet and up to 15 inches at peaks. Winds gusting as
high as 55 mph.
* WHERE...West Slope Northern Sierra Nevada and Western Plumas
County/Lassen Park Counties.
* WHEN...Until 10 PM PST this evening.
* IMPACTS...Dangerous travel conditions with chain controls and road
closures from heavy snow and gusty winds.
* ADDITIONAL DETAILS...Snow levels will be around 4500 to 5500 feet
today. Snowfall rates of 1 to 2 inches per hour at times.
From: Dec 26, 2025 19:44
Until: Dec 27, 2025 06:00
Winter Storm Warning
* WHAT...Heavy snow showers. Additional snow accumulations 4-8
inches west of Highway 89 including around Donner and Echo
Summits. 2-5 inches for Mt Rose Highway. 1-3 inches for Truckee
and South Lake Tahoe. Winds gusting as high as 60 mph on the
ridges, 40 mph in the valleys.
* WHERE...Greater Lake Tahoe Area.
* WHEN...Until 10 PM PST this evening.
* IMPACTS...Plan on slippery road conditions. The hazardous
conditions could impact the Friday evening commute. Strong winds
could cause damage to trees and power lines.
From: Dec 26, 2025 18:45
Until: Dec 27, 2025 06:00
Wind Advisory
* WHAT...South winds 10 to 20 mph with gusts up to 40 mph.
* WHERE...Carquinez Strait and Delta, Sacramento Valley, Motherlode,
Northeast Foothills, and Northern San Joaquin Valley.
* WHEN...Until 6 PM PST this evening.
* IMPACTS...Gusty winds will blow around unsecured objects and
holiday decorations. Tree limbs could be blown down and a few
power outages may result.
* ADDITIONAL DETAILS...Breezy to gusty southerly winds are expected
through the afternoon, gradually decreasing by the evening.
From: Dec 26, 2025 17:49
Until: Dec 27, 2025 02:00
Flood Advisory
* WHAT...Flooding caused by excessive rainfall continues.
* WHERE...Portions of central and northern California, including the
following counties, in central California, Placer. In northern
California, Amador, Butte, Calaveras, El Dorado, Nevada,
Sacramento, San Joaquin, Sierra, Solano, Stanislaus, Sutter,
Tuolumne, Yolo and Yuba.
* WHEN...Until 600 PM PST Friday.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Water over roadways.
* ADDITIONAL DETAILS...
- At 656 PM PST, Doppler radar indicated moderate to heavy
rain. Minor flooding is ongoing or expected to begin shortly
in the advisory area.
- Periods of moderate to heavy rainfall is forecast to occur in
the advisory area into Friday, resulting in flooding.
- Some locations that will experience flooding include...
Sacramento, Stockton, Modesto, Elk Grove, Roseville, Citrus
Heights, Tracy, Folsom, Turlock, Rocklin, Ceres, Galt,
Oakdale, Auburn, Grass Valley, Marysville, Placerville,
Sonora, Jackson and Paloma.
- http://www.weather.gov/safety/flood
From: Dec 26, 2025 02:59
Until: Dec 27, 2025 02:00
Flood Advisory
* WHAT...Flooding caused by excessive rainfall continues.
* WHERE...A portion of northern California, including the following
counties, Butte, Colusa, Glenn, Sacramento, Solano, Sutter and
Yolo.
* WHEN...Until 600 PM PST Friday.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Water over roadways.
* ADDITIONAL DETAILS...
- At 656 PM PST, Doppler radar indicated moderate to heavy
rain. Minor flooding is ongoing or expected to begin shortly
in the advisory area.
- Periods of moderate to heavy rainfall is forecast to occur in
the advisory area into Friday, resulting in flooding.
- Some locations that will experience flooding include...
Vallejo, Fairfield, Vacaville, Davis, Woodland, Benicia,
Rumsey, Maxwell, Suisun City, Dixon, Winters, Gridley,
Colusa, Dunnigan, Capay, Zamora, Madison, Cadenasso, Brooks
and Tancred.
- http://www.weather.gov/safety/flood
From: Dec 26, 2025 02:59
Until: Dec 27, 2025 02:00
Flood Watch
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
From: Dec 21, 2025 00:00
Until: Dec 27, 2025 00:00
Flood Watch
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northern California, including the following
areas, Sacramento Valley, northern San Joaquin Valley, Delta
region, and the foothills of the Sierra Nevada.
* 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 into Friday.
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
From: Dec 26, 2025 03:45
Until: Dec 27, 2025 00:00
Flood Watch
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, Carquinez Strait and Delta, Sacramento Valley, Motherlode,
Mountains Southwestern Shasta County to Western Colusa County,
Northeast Foothills, Northern San Joaquin Valley, and Shasta Lake
Area / Northern Shasta County.
* 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
From: Dec 25, 2025 19:52
Until: Dec 27, 2025 00:00
Winter Storm Warning
* WHAT...Heavy snow expected. total 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...Until 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 around 4500 to 5500 feet
today through Friday. Snowfall rates of 1 to 2 inches per hour at
times.
From: Dec 25, 2025 19:50
Until: Dec 26, 2025 23:00
Wind Advisory
* WHAT...South winds 15 to 25 mph with gusts up to 45 mph.
* WHERE...Carquinez Strait and Delta, Sacramento Valley, Motherlode,
Northeast Foothills, and Northern San Joaquin Valley.
* WHEN...Until 10 AM PST Friday.
* IMPACTS...Gusty winds will blow around unsecured objects and
holiday decorations. Tree limbs could be blown down and a few
power outages may result.
* ADDITIONAL DETAILS...High Wind Warning was downgraded to the Wind
Advisory. Breezy southerly winds are expected, with the strongest
this evening and overnight.
From: Dec 25, 2025 19:45
Until: Dec 26, 2025 18:00
Avalanche Warning
AVWREV
The following message is transmitted at the request of the U.S.
Forest Service Sierra Avalanche Center.
The Sierra Avalanche Center in Truckee has issued a BACKCOUNTRY
AVALANCHE WARNING for the following areas:
NWS Reno NV - NVZ002 (Greater Lake Tahoe)...CAZ072 (Greater Lake Tahoe (CA))
* WHAT...HIGH avalanche danger exists in the backcountry. Avalanches are expected to occur Thursday and Thursday night across backcountry terrain.
* WHERE...Central Sierra Nevada Mountains between Yuba Pass (Hwy 49) on the north and Ebbetts Pass (Hwy 4) on the south, including the greater Lake Tahoe area. This does not include ski areas or highways where avalanche mitigation programs exist.
* WHEN...In effect from Thu 05:00 PST to Fri 04:00 PST.
* IMPACTS...Rapidly accumulating snowfall and gale-force winds that blow and drift snow have created dangerous avalanche conditions in the mountains. Natural avalanches are likely, and human-triggered avalanches large enough to bury or injure people are very likely.
* PRECAUTIONARY / PREPAREDNESS ACTIONS...Traveling in, near, or below backcountry avalanche terrain is not recommended during HIGH avalanche danger.
Consult https://www.sierraavalanchecenter.org/ or www.avalanche.org for more detailed information.
Similar avalanche danger may exist at locations outside the coverage area of this or any avalanche center.
From: Dec 25, 2025 13:26
Until: Dec 26, 2025 13:00
Winter Storm Warning
* WHAT...Heavy snow. Additional snow accumulations between 8 to 16
inches for Lake Tahoe communities with 1 to 3 feet above 7,000
feet. Winds gusting as high as 100 mph along the highest ridges
and up to 50 mph in the lower elevations and on Lake Tahoe.
* WHERE...Greater Lake Tahoe Area.
* WHEN...Until 10 AM PST Friday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact Christmas evening travel and the
Friday morning commute. Very strong winds could cause extensive
damage to trees and power lines.
From: Dec 25, 2025 22:49
Until: Dec 26, 2025 12:00
Flood Advisory
* WHAT...Flooding caused by excessive rainfall is expected.
* WHERE...A portion of northern California, including the following
counties, Butte, Colusa, Glenn, Sacramento, Solano, Sutter and
Yolo.
* WHEN...Until 900 PM PST Thursday.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Water over roadways.
* ADDITIONAL DETAILS...
- At 944 PM PST, Doppler radar indicated heavy rain. Minor
flooding is ongoing or expected to begin shortly in the
advisory area.
- Moderate to heavy rainfall is forecast to occur in the
advisory area overnight and into Christmas Day, resulting in
flooding.
- Some locations that will experience flooding include...
Vallejo, Fairfield, Vacaville, Davis, Woodland, Benicia,
Rumsey, Maxwell, Suisun City, Dixon, Winters, Gridley,
Colusa, Dunnigan, Capay, Zamora, Madison, Cadenasso, Brooks
and Tancred.
- http://www.weather.gov/safety/flood
From: Dec 25, 2025 05:45
Until: Dec 26, 2025 05:00
Flood Advisory
* WHAT...Flooding caused by excessive rainfall continues.
* WHERE...Portions of central and northern California, including the
following counties, in central California, Placer. In northern
California, Amador, Butte, Calaveras, El Dorado, Nevada,
Sacramento, San Joaquin, Sierra, Solano, Stanislaus, Sutter,
Tuolumne, Yolo and Yuba.
* WHEN...Until 900 PM PST Thursday.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Water over roadways.
* ADDITIONAL DETAILS...
- At 101 PM PST, Doppler radar indicated areas of moderate to
heavy rain. Minor flooding is ongoing or expected to begin
shortly in the advisory area.
- Periods of moderate to heavy rainfall is forecast to occur in
the advisory area through Christmas Day, resulting in
flooding.
- Some locations that will experience flooding include...
Sacramento, Stockton, Modesto, Elk Grove, Roseville, Citrus
Heights, Tracy, Folsom, Turlock, Rocklin, Ceres, Galt,
Oakdale, Auburn, Grass Valley, Marysville, Placerville,
Sonora, Jackson and Paloma.
- http://www.weather.gov/safety/flood
From: Dec 25, 2025 21:04
Until: Dec 26, 2025 05:00
Flood Advisory
* WHAT...Flooding caused by excessive rainfall continues.
* WHERE...A portion of northern California, including the following
counties, Butte, Colusa, Glenn, Sacramento, Solano, Sutter and
Yolo.
* WHEN...Until 900 PM PST Thursday.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Water over roadways.
* ADDITIONAL DETAILS...
- At 101 PM PST, Doppler radar indicated areas of moderate to
heavy rain. Minor flooding is ongoing or expected to begin
shortly in the advisory area.
- Periods of moderate to heavy rainfall is forecast to occur in
the advisory area through Christmas Day, resulting in
flooding.
- Some locations that will experience flooding include...
Vallejo, Fairfield, Vacaville, Davis, Woodland, Benicia,
Rumsey, Maxwell, Suisun City, Dixon, Winters, Gridley,
Colusa, Dunnigan, Capay, Zamora, Madison, Cadenasso, Brooks
and Tancred.
- http://www.weather.gov/safety/flood
From: Dec 25, 2025 21:04
Until: Dec 26, 2025 05:00
Winter Storm Warning
* 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...Until 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 around 4500 to 5500 feet
today through Friday. Snowfall rates of 1 to 2 inches per hour at
times.
From: Dec 24, 2025 21:22
Until: Dec 26, 2025 00:00
High Wind Warning
* WHAT...South winds 25 to 35 mph with gusts up to 60 mph expected.
* WHERE...Carquinez Strait and Delta, Sacramento Valley, Motherlode,
Northeast Foothills, and Northern San Joaquin Valley.
* WHEN...Until 4 PM PST Thursday.
* IMPACTS...Strong winds and saturated soils could blow down trees
and power lines resulting in widespread power outages. Strong
winds will cause impacts to loose and unsecured items, including
temporary structures and holiday decorations. Difficult travel
conditions are expected, especially for high profile vehicles.
* ADDITIONAL DETAILS...Lull in activity through today, with strong
wind gusts expected tonight into Thursday.
From: Dec 24, 2025 17:24
Until: Dec 26, 2025 00:00
