Current watches, warnings, and advisories for California
Last Update: Nov 21 2024 at 2:18 am EST
Napa, CA; Sonoma, CA
* WHAT...Urban area and small stream flooding caused by excessive
rainfall is expected.
* WHERE...Southern Napa County including the city of Napa.
* WHEN...Until 515 AM PST.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Rises in small streams and normally dry arroyos. Water over
roadways.
* ADDITIONAL DETAILS...
- At 1118 PM PST, Doppler radar and automated rain gauges
indicated heavy rain. This will cause urban and small stream
flooding. Between 2 and 4 inches of rain have fallen.
- Additional rainfall amounts of 1 to 3 inches are expected
over the area. This additional rain will result in minor
flooding.
- Some locations that will experience flooding include...
Napa and American Canyon.
- http://www.weather.gov/safety/flood
Alameda, CA; Contra Costa, CA; Marin, CA
* WHAT...Urban area and small stream flooding caused by excessive
rainfall is expected.
* WHERE...Northwestern Alameda County north of downtown Oakland,
western Contra Costa County and southern Marin County.
* WHEN...Until 515 AM PST.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Rises in small streams and normally dry arroyos. Water over
roadways.
* ADDITIONAL DETAILS...
- At 1115 PM PST, Doppler radar and automated rain gauges
indicated heavy rain. This will cause urban and small stream
flooding. Up to 1 inch of rain has fallen.
- Several flooding reports are already coming in from Contra
Costa County. Additional rainfall amounts of 1 to 3 inches
are expected over the area. This additional rain will result
in minor flooding.
- Some locations that will experience flooding include...
Concord, Berkeley, Richmond, Mountain View, Walnut Creek,
Martinez, Pleasant Hill, San Pablo, Lafayette, El Cerrito,
Hercules, Albany, Pinole, Orinda, Moraga, Mill Valley,
Larkspur, Piedmont and Emeryville.
- http://www.weather.gov/safety/flood
Humboldt, CA; Mendocino, CA; Trinity, CA
* WHAT...Flooding caused by excessive rainfall is expected.
* WHERE...A portion of northwest California, including the following
counties, southeastern Humboldt, northwestern Mendocino and
southwestern Trinity.
* WHEN...Until 215 AM PST.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Water over roadways.
* ADDITIONAL DETAILS...
- At 1112 PM PST, Doppler radar indicated heavy rain due to
thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area. Between 4 and 6 inches of rain
have fallen.
- Additional rainfall amounts of 1 to 2 inches are expected
over the area through 2 AM. This additional rain will result
in minor flooding.
- Some locations that will experience flooding include...
Garberville, Richardson Grove State Park, Laytonville,
Alderpoint, Richardson Grove, Redway, Ruth, Leggett,
Dinsmore, Bridgeville, Fort Seward, Zenia, Blocksburg,
Benbow, Miranda and Piercy.
- http://www.weather.gov/safety/flood
Siskiyou, CA
* WHAT...Flooding caused by excessive rainfall and snowmelt is
expected.
* WHERE...A portion of northern California, including the following
county, Siskiyou, including the cities of Mount Shasta City, Weed,
Callahan and Tennant.
* WHEN...Until midnight PST Friday Night.
* IMPACTS...Flooding of rivers, creeks, streams, and other low-lying
and flood-prone locations is imminent or occurring.
* ADDITIONAL DETAILS...
- At 1042 PM PST, Satellite estimates and rain gauge data
indicate heavy rain and snowmelt in the warned area. Flooding
is ongoing or expected to begin shortly. Between 2 and 6
inches of rain have fallen.
- Additional rainfall amounts of 3 to 7 inches are possible in
the warned area. Many areas that received heavy snowfall
earlier have switched over to rain. Rain can melt the snow
and cause a higher runoff response than rainfall alone.
- Some locations that will experience flooding include...
Mount Shasta, Weed, Dunsmuir, Pilgrim Creek Snow Park, Trout
Creek Campground, Cattle Camp Campground, Fowlers Camp
Campground And McCloud Falls, McCloud, Tennant, Mount Shasta
Summit Plateau, Mount Shasta Ski Park Highway, Mount Shasta
Bunny Flat Trail, Mcbride Springs Campground, Pondosa, Four
Corners Snow Park, I 5 Black Butte Summit, Carrick, Edgewood,
Medicine Lake Campground and Callahan.
- http://www.weather.gov/safety/flood
Mendocino Coast; Northwestern Mendocino Interior; Northeastern Mendocino Interior; Southwestern Mendocino Interior; Southeastern Mendocino Interior
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northwest California, including the Mendocino
Coast, Northeastern Mendocino Interior, Northwestern Mendocino
Interior, Southeastern Mendocino Interior and Southwestern
Mendocino Interior.
* WHEN...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. Low-water crossings may be
flooded. Storm drains and ditches may become clogged with debris.
Extensive street flooding and flooding of creeks and rivers are
possible. Area creeks and streams are running high and could flood
with more heavy rain.
* ADDITIONAL DETAILS...
- An additional 4 to 10 inches of rain is expected to fall
tonight through early Friday.
- http://www.weather.gov/safety/flood
Southern Trinity
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northwest California, including the following
area, Southern Trinity.
* WHEN...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. Low-water crossings may be
flooded. Storm drains and ditches may become clogged with debris.
Extensive street flooding and flooding of creeks and rivers are
possible. Area creeks and streams are running high and could flood
with more heavy rain.
* ADDITIONAL DETAILS...
- An additional 5 to 10 inches of rain is expected to fall
mainly tonight and Thursday with occasional light rain on
Friday.
- http://www.weather.gov/safety/flood
Northern Humboldt Coast; Southwestern Humboldt; Northern Humboldt Interior; Southern Humboldt Interior
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northwest California, including the Northern
Humboldt Coast, Northern Humboldt Interior, Southern Humboldt
Interior and Southwestern Humboldt.
* WHEN...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. Low-water crossings may be
flooded. Storm drains and ditches may become clogged with debris.
Extensive street flooding and flooding of creeks and rivers are
possible. Area creeks and streams are running high and could flood
with more heavy rain.
* ADDITIONAL DETAILS...
- An additional 3 to 10 inches of rain is expected to fall
tonight tonight through Friday morning. The heaviest amounts
will be in the King Range. Additional light rain expected to
continue Friday.
- http://www.weather.gov/safety/flood
Coastal Del Norte; Del Norte Interior
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northwest California, including Coastal Del
Norte and Del Norte Interior.
* WHEN...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. Low-water crossings may be
flooded. Storm drains and ditches may become clogged with debris.
Extensive street flooding and flooding of creeks and rivers are
possible. Area creeks and streams are running high and could flood
with more heavy rain.
* ADDITIONAL DETAILS...
- An additional 0.5 to 2 inches of rain is expected to fall
tonight and early Thursday. Then heavier rain is expected
again with an additional 2 to 5 inches possible Thursday
afternoon and Thursday night. Additional light rain expected
to continue Friday.
- http://www.weather.gov/safety/flood
Northern Lake County; Southern Lake County
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northwest California, including the following
areas, Northern Lake and Southern Lake.
* WHEN...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. Low-water crossings may be
flooded. Storm drains and ditches may become clogged with debris.
Extensive street flooding and flooding of creeks and rivers are
possible. Area creeks and streams are running high and could flood
with more heavy rain.
* ADDITIONAL DETAILS...
- An additional 3 to 7 inches is expected to fall tonight
through Friday.
- http://www.weather.gov/safety/flood
Napa, CA; Sonoma, CA
* WHAT...Urban area and small stream flooding caused by excessive
rainfall continues.
* WHERE...Areas near Calistoga, St. Helena, Yountville, Lake
Berryessa, and the city of Sonoma in northeastern Sonoma and
northern and central Napa counties.
* WHEN...Until 215 AM PST.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Rises in small streams and normally dry arroyos. Overflowing poor
drainage areas.
* ADDITIONAL DETAILS...
- At 1026 PM PST, Doppler radar and automated rain gauges
indicated heavy rain. This will cause urban and small stream
flooding. Between 3 and 5 inches of rain have fallen.
- Additional rainfall amounts of 0.5 to 1.5 inches are expected
over the area. This additional rain will result in minor
flooding.
- Some locations that will experience flooding include...
Napa, Sonoma, St. Helena, Calistoga, Boyes Hot Springs,
Yountville, Angwin, Deer Park, Glen Ellen, Eldridge, Fetters
Hot Spring, Fetters Hot Springs-Agua Caliente, El Verano and
Temelec.
- http://www.weather.gov/safety/flood
South Central Siskiyou County; North Central and Southeast Siskiyou County
* WHAT...Wet snow above 4500 feet. Additional snow accumulations 3
to 6 inches.
* WHERE...Central and Southeast Siskiyou County. This includes
Snowmans Summit on Highway 89 and the higher terrain around Mount
Shasta.
* WHEN...Until 7 AM PST Thursday.
* IMPACTS...Travel could be very difficult with reduced visibility.
The hazardous conditions could impact the Thursday morning commute.
* ADDITIONAL DETAILS...Snow levels will gradually rise to around
6000 feet early Thursday morning with snow changing to rain.
Coastal Del Norte; Del Norte Interior; Northern Humboldt Coast; Southwestern Humboldt; Northern Humboldt Interior; Southern Humboldt Interior
* WHAT...South winds 25 to 35 mph with gusts up to 65 mph possible.
* WHERE...Del Norte County, and Humboldt County.
* WHEN...From Thursday afternoon through late Thursday 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. 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.
Mendocino Coast
* WHAT...South winds 20 to 30 mph with gusts up to 50 mph expected.
* WHERE...Mendocino Coast.
* WHEN...Until 4 AM PST Friday.
* IMPACTS...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. Gusty winds will
blow around unsecured objects. Tree limbs could be blown down and
a few power outages may result.
Northern Sacramento Valley; Central Sacramento Valley; Northeast Foothills/Sacramento Valley
* WHAT...Southeast winds 15 to 25 mph with gusts 35 to 45 mph.
* WHERE...Central and Northern Sacramento Valley and Northeast
Foothills
* WHEN...Until 7 AM PST Thursday.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
Sonoma, CA
* WHAT...Urban area and small stream flooding caused by excessive
rainfall is ongoing.
* WHERE...Northern and central Sonoma County, including the Sonoma
coastal ranges, the 101 corridor including the city of Santa Rosa,
and the Mayacamas.
* WHEN...Until 315 AM PST.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Rises in small streams and normally dry arroyos. Overflowing poor
drainage areas.
* ADDITIONAL DETAILS...
- At 919 PM PST, Doppler radar and automated rain gauges
indicated heavy rain. This is causing urban and small stream
flooding. Between 3 and 6 inches of rain have fallen.
- Colgan Creek, Santa Rosa Creek, and Laguna de Santa Rosa are
experiencing minor flooding, and the risk for minor flooding
remains along Green Valley Creek. Roads have been closed due
to flooding. Additional rainfall amounts of 1 to 2 inches are
expected over the area. This additional rain will result in
minor flooding.
- Some locations that will experience flooding include...
Santa Rosa, Rohnert Park, Windsor, Healdsburg, Cloverdale,
Sebastopol, Cotati, Larkfield-Wikiup, Roseland, South Santa
Rosa Cdp, Forestville, Guerneville, Monte Rio, Graton,
Occidental and South Santa Rosa.
- http://www.weather.gov/safety/flood
Burney Basin / Eastern Shasta County; Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada
* WHAT...Heavy wet snow. Additional snow accumulations 2 to 5
inches. Winds gusting as high as 45 mph.
* WHERE...Burney Basin / Eastern Shasta County, West Slope Northern
Sierra Nevada, and Western Plumas County/Lassen Park Counties.
* WHEN...Until 4 AM PST Thursday.
* IMPACTS...Slick travel conditions expected, with snow covered
roads and chain controls likely. Gusty winds could bring down tree
branches.
* ADDITIONAL DETAILS...Snow levels 5000 to 6500 feet.
Northern Trinity
* WHAT...Heavy snow expected. Additional accumulations of 12 to 18
inches above 3500 feet, 4 to 6 inches between 2500 to 3500 feet
and less than an inch below 2500 feet. Snow levels rising through
this evening and overnight.
* WHERE...Northeastern Trinity.
* WHEN...Until 3 AM PST Thursday.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous. The strong winds and weight of
snow on tree limbs may down power lines and could cause sporadic
power outages. Travel could be very difficult. Tire chains may be
necessary if travelling through mountain passes.
* ADDITIONAL DETAILS...This includes highway 3 in multiple areas
north of Weaverville.
Ojai Valley; Calabasas and Agoura Hills
* WHAT...Temperatures as low as 30 will result in frost formation.
* WHERE...Calabasas and Agoura Hills and Ojai Valley.
* WHEN...From 2 AM to 8 AM PST Thursday.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches
* WHAT...Large breaking waves of 10 to 13 feet for northwest and
west facing beaches with dangerous rip currents.
* WHERE...San Luis Obispo County Beaches and Santa Barbara
County Central Coast Beaches.
* WHEN...Until 10 AM PST Thursday.
* IMPACTS...There is an increased risk for ocean drowning. Rip
currents can pull swimmers and surfers out to sea. Large
breaking waves can cause injury, wash people off beaches and
rocks, and capsize small boats near shore.
Marin, CA; Sonoma, CA
* WHAT...Urban area and small stream flooding caused by excessive
rainfall is expected.
* WHERE...Most of Marin County and southern Sonoma County, including
the cities of San Rafael and Petaluma.
* WHEN...Until 130 AM PST Thursday.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Rises in small streams and normally dry arroyos. Overflowing poor
drainage areas.
* ADDITIONAL DETAILS...
- At 726 PM PST, Doppler radar and automated rain gauges
indicated heavy rain. This will cause urban and small stream
flooding. Between 1 and 3 inches of rain have fallen.
- Additional rainfall amounts of 1 to 3 inches are expected
over the area. This additional rain will result in minor
flooding.
- Some locations that will experience flooding include...
Petaluma, San Rafael, Novato, Mill Valley, San Anselmo,
Larkspur, Corte Madera, Fairfax, Cotati, Point Reyes Station,
San Geronimo, Tomales, Lucas Valley-Marinwood, Dillon Beach,
Black Point-Green Point, Kentfield, Ross, Inverness,
Lagunitas-Forest Knolls and Woodacre.
- http://www.weather.gov/safety/flood
Greater Lake Tahoe Area; Greater Lake Tahoe Area
* WHAT...Southwest winds 15 to 20 mph with gusts up to 35 mph and
waves 2 to 3 feet.
* WHERE...Greater Lake Tahoe Area.
* WHEN...Until 4 AM PST Thursday.
* IMPACTS...Small boats, kayaks and paddle boards will be prone to
capsizing and should remain off lake waters until conditions
improve.
Central Siskiyou County
* WHAT...South winds 25 to 40 mph with gusts up to 60 mph.
* WHERE...The Shasta Valley in central Siskiyou COunty, including
Weed, Grenada, Montague, and portions of Interstate 5 and Highway
97.
* WHEN...Until 10 AM PST Friday.
* IMPACTS...Damaging winds will blow down trees and power lines.
Widespread power outages are expected. Travel will be difficult,
especially for high profile vehicles.
* ADDITIONAL DETAILS...Gusty winds persist overnight, but could ease
for a time into Thursday afternoon. Strong winds are likely to
redevelop Thursday evening with gusts to 60 mph into Friday
morning.
Northeast Siskiyou and Northwest Modoc Counties; Modoc County; Klamath Basin; Northern and Eastern Klamath County and Western Lake County; Central and Eastern Lake County
* WHAT...South winds 25 to 40 mph with gusts up to 60 mph.
* WHERE...Portions of Lake and Modoc counties and far eastern
Klamath County, including Lakeview, Valley Falls, Bly, Paisley,
Summer Lake, Silver Lake, Adel, Fort Rock, the Warner and Hart
mountains, and portions of Highways 395, 31, and 140. Northeast
Siskiyou and southwest Klamath counties, including Dorris,
Macdoel, Klamath Falls, Bonanza, and portions of Highways 97, 140,
39, and 139.
* WHEN...Until 10 AM PST Friday.
* IMPACTS...Damaging winds will blow down trees and power lines.
Widespread power outages are expected. Travel will be difficult,
especially for high profile vehicles.
* ADDITIONAL DETAILS...Gusty winds persist overnight, but could ease
for a time into Thursday afternoon. Strong winds are likely to
redevelop Thursday evening with gusts to 60 mph into Friday
morning.
Lake, CA
* WHAT...Small stream flooding caused by excessive rainfall is
expected.
* WHERE...A portion of central California, including the following
county, southeastern Lake.
* WHEN...Until 1130 PM PST.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Water over roadways.
* ADDITIONAL DETAILS...
- At 537 PM PST, Doppler radar and automated rain gauges
indicated heavy rain due to thunderstorms. This will cause
small stream flooding. Between 0.5 and 1.5 inches of rain
have fallen.
- Additional rainfall amounts of 1 to 2 inches are expected
over the area this evening. This additional rain will
continue to result in minor flooding.
- Some locations that will experience flooding include...
Middletown, Clearlake, Seigler Springs, Ettawa Springs,
Anderson Springs, Whispering Pines, Forest Lake, Adams, Loch
Lomond, Hobergs, Hidden Valley Lake, Lower Lake and Cobb.
- http://www.weather.gov/safety/flood
Southeastern Mendocino Interior
...The Flood Watch is extended for the following rivers in
California...
Russian River near Hopland affecting Southeastern Mendocino
Interior zone.
Eel River at Fernbridge affecting Northern Humboldt Coast zone.
For the Russian River...including Hopland...flooding is possible.
For the Eel River...including Fernbridge...flooding is possible.
* WHAT...Flooding is possible.
* WHERE...Russian River near Hopland.
* WHEN...From Friday morning to early Saturday morning.
* 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 1:45 PM PST Wednesday the stage was 1.9 feet.
- Forecast...Flood stage may be reached late Friday morning.
- Flood stage is 15.0 feet.
- http://www.weather.gov/safety/flood
Northern Humboldt Coast
...The Flood Watch is extended for the following rivers in
California...
Russian River near Hopland affecting Southeastern Mendocino
Interior zone.
Eel River at Fernbridge affecting Northern Humboldt Coast zone.
For the Russian River...including Hopland...flooding is possible.
For the Eel River...including Fernbridge...flooding is possible.
* WHAT...Flooding is possible.
* WHERE...Eel River at Fernbridge.
* WHEN...From Thursday evening to late Saturday morning.
* 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.
At 22.0 feet, The western half of the Eel Delta may be completely
flooded, especially if at or above this level for an extended
period of time. This includes areas northwest of Loleta and
Cannibal Island Road. A Special Action Advisory is being issued to
all owners of livestock in low-lying areas of the Eel River Delta.
Owners of livestock should take appropriate action to protect
their animals.
* ADDITIONAL DETAILS...
- At 2:15 PM PST Wednesday the stage was 2.4 feet.
- Forecast...Flood stage may be reached late tomorrow evening.
- Flood stage is 20.0 feet.
- http://www.weather.gov/safety/flood
Marin Coastal Range; Sonoma Coastal Range; North Bay Interior Mountains; Coastal North Bay Including Point Reyes National Seashore; North Bay Interior Valleys
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...The North Bay.
* WHEN...Through late Friday night.
* IMPACTS...Creeks and streams may rise out of their banks. Flooding
may occur in poor drainage and urban areas. Low-water crossings
may be flooded.
* ADDITIONAL DETAILS...
- Light to moderate rain is continuing across the watch area.
Two to four inches of rain have already fallen in the valley
regions with up to six inches of rain in the higher
elevations. Areas of the Sonoma County valleys have already
reported minor flooding and road closures.
- http://www.weather.gov/safety/flood
Lassen, CA; Plumas, CA; Sierra, CA
* WHAT...Minor flooding is forecast for the Susan River, small creeks
and streams, and on or near recent burn scars. This does not include
the Middle Fork of the Feather.
* WHERE...Northeast California including Lassen, eastern Plumas, and
eastern Sierra counties.
* WHEN...Until noon PST Saturday. Flows are expected to rise though
the day Thursday into Friday with peak flows occurring late Friday
to early Saturday morning.
* IMPACTS...Minor flooding along low lying areas near the Susan
River in and downstream of Susanville, as well as near other
creeks, streams, urban areas. Rock and debris may cover roads
especially near or below recent burn areas.
* ADDITIONAL DETAILS...
- At 210 PM PST, Rounds of high elevation snow and heavy rain
are forecast today through Saturday morning before
transitioning to snow.
- Additional rainfall amounts of 3 to 6 inches are expected
over the area. This additional rain will result in minor
flooding.
- Some locations that will experience flooding include...
Eagle Lake, Termo, Herlong, Beckwourth, Doyle, Blairsden,
Plumas Eureka State Park, Graeagle, Chilcoot, Bieber,
Sierraville, Nubieber, Stampede Reservoir, Verdi, Susanville,
Standish, Janesville, Aspen Grove Campground, Antelope Lake
and Spaulding.
- http://www.weather.gov/safety/flood
For river forecast updates, visit cnrfc.noaa.gov
San Francisco; Coastal North Bay Including Point Reyes National Seashore; San Francisco Peninsula Coast; Southern Monterey Bay and Big Sur Coast
* WHAT...Large breaking waves between 14 to 19 ft along
southwest facing beaches and between 19 to 22 ft along well
exposed west facing beaches.
* WHERE...San Francisco, Coastal North Bay Including Point Reyes
National Seashore, San Francisco Peninsula Coast and Southern
Monterey Bay and Big Sur Coast Counties.
* WHEN...Until 6 AM PST Friday.
* IMPACTS...Dangerous swimming and surfing conditions and
localized beach erosion. Large waves can sweep across the
beach without warning, pulling people into the sea from rocks,
jetties and beaches. Sudden immersion in cold water can result
in cold water shock even for the most experienced swimmers.
Cold water shock can result in dramatic changes in breathing,
heart rate and blood pressure, greatly increasing the risk of
drowning in rough open waters.
Northern Monterey Bay
* WHAT...A moderate period northwest swell will result in a more
energetic surf zone and an increased risk of sneaker waves and
rip currents. Breaking waves of 10 to 13 ft are expected with
some potential for breaking waves up to 15 ft to develop.
* WHERE...Northern Monterey Bay County.
* WHEN...Through late Thursday night.
* IMPACTS...Dangerous swimming and surfing conditions. Large
waves can sweep across the beach without warning, pulling
people into the sea from rocks, jetties, and beaches. Sudden
immersion in cold water can result in cold water shock even
for the most experienced swimmers. Cold water shock can result
in dramatic changes in breathing, heart rate and blood
pressure, greatly increasing the risk of drowning in rough
open waters.
San Francisco; Marin Coastal Range; Sonoma Coastal Range; North Bay Interior Mountains; Coastal North Bay Including Point Reyes National Seashore; North Bay Interior Valleys; San Francisco Bay Shoreline; San Francisco Peninsula Coast
* WHAT...South winds 20 to 30 mph with gusts up to 50 mph.
* WHERE...San Francisco, Marin Coastal Range, Sonoma Coastal
Range, North Bay Interior Mountains, North Bay Interior Valleys,
San Francisco Bay Shoreline, San Francisco Peninsula Coast
* WHEN...Until 6 AM PST Thursday.
* IMPACTS...Gusty winds could blow around unsecured objects.
Tree limbs could be blown down and a few power outages may
result.
Siskiyou, CA; Coos, OR; Curry, OR; Jackson, OR; Josephine, OR
* WHAT...Flooding caused by excessive rainfall and snow melt is
expected.
* WHERE...Portions of southwest Oregon, including Coos, Curry,
Jackson, and Josephine counties and western Siskiyou County in
northern California.
* WHEN...Until midnight PST Friday Night.
* IMPACTS...Flooding of rivers, creeks, streams, and other low-lying
and flood-prone locations is expected.
* ADDITIONAL DETAILS...
- At 1227 PM PST, satellite estimates and rain gauge data
indicate heavy rain in the warned area. Between 1 and 6
inches of rain have fallen.
- Additional rainfall amounts of 3 to 7 inches are possible in
the warned area. Some areas will receive snowfall and then
switch to rainfall. Rain can melt the snow and cause a higher
runoff response than rainfall alone.
- http://www.weather.gov/safety/flood
Shasta Lake Area / Northern Shasta County; Northern Sacramento Valley; Central Sacramento Valley; Mountains Southwestern Shasta County to Western Colusa County; Northeast Foothills/Sacramento Valley
* WHAT...Prolonged periods of moderate to heavy rain with total
amounts 3 to 6 inches expected and amounts up to 8 inches possible
in the foothills. Flooding caused by excessive rainfall is
possible.
* WHERE...A portion of northern California, including the following
areas, Central Sacramento Valley, Mountains Southwestern Shasta
County to Western Colusa County, Northeast Foothills/Sacramento
Valley, Northern Sacramento Valley and Shasta Lake Area / Northern
Shasta County.
* WHEN...Through 4 AM PST Saturday morning.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- http://www.weather.gov/safety/flood
South Central Siskiyou County
AVWMFR
The Mount Shasta Avalanche Center has issued a BACKCOUNTRY
AVALANCHE WARNING for the following areas:
NWS Medford OR - CAZ082 (South Central Siskiyou County).
* WHAT...An exceptionally powerful atmospheric river will impact
the Mount Shasta region. Prolonged periods of heavy snowfall,
along with rain-on-snow will create high avalanche danger.
* WHERE...Avalanche terrain of Mount Shasta, Castle Lake, the
Eddy Mountains, and Ash Creek Butte area east of Mount Shasta.
* WHEN...In effect from Tue 12:00 PST to Thu 12:00 PST.
* IMPACTS...Intense rainfall and multiple feet of new snow will
produce large and destructive avalanches. These avalanches may
run long distances into flat terrain, valley floors, and mature
forests. In addition, debris flows are possible out of Mount
Shasta drainages such as Cascade Gulch, Ash Creek, and Mud
Creek.
* PRECAUTIONARY / PREPAREDNESS ACTIONS...Very dangerous avalanche
conditions. Travel in, near, or below avalanche terrain is not
recommended. Recreational users without backcountry avalanche
skills are advised to stay out of the backcountry. Deep snow
conditions exist.
Consult http://shastaavalanche.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.
