Cold Weather Advisory
URGENT - WEATHER MESSAGE
National Weather Service San Francisco CA
704 AM PST Fri Dec 5 2025
CAZ506-516-518-051615-
/O.CON.KMTR.CW.Y.0001.000000T0000Z-251205T1600Z/
North Bay Interior Valleys-Southern Salinas Valley/Arroyo Seco
and Lake San Antonio-Mountains of San Benito County And Interior
Monterey County including Pinnacles National Park-
704 AM PST Fri Dec 5 2025
...COLD WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM PST THIS
MORNING...
* WHAT...Cold conditions with temperatures 33 to 36 degrees and
locally to the upper 20s in higher elevations.
* WHERE...Most of San Benito County and the Cholame Hills in
Southeast Monterey County, North Bay Interior Valleys, and Southern
Salinas Valley/Arroyo Seco and Lake San Antonio.
* WHEN...Until 8 AM PST this morning.
* IMPACTS...Cold conditions will be hazardous to sensitive
populations such as unhoused individuals. Prolonged exposure to the
cold conditions will lead to hypothermia for people, pets, and
livestock. Cold conditions may damage or kill sensitive crops,
plants, and vegetation if appropriate precautions are not taken.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Ensure portable heaters are working properly and are used correctly
to avoid sparking a fire indoors. Do not use generators or grills
inside as carbon monoxide poisoning can result.
Check with your local, city, or county officials for information on
available warming centers.
Be sure to dress in layers if outdoors. Make sure that pets and
livestock have adequate food, unfrozen water, and warmth. Cover or
tend to sensitive crops, plants, and vegetation.
&&
$$
DialH
URGENT - WEATHER MESSAGE
National Weather Service San Francisco CA
704 AM PST Fri Dec 5 2025
CAZ510-051900-
/O.NEW.KMTR.FG.Y.0032.251205T1504Z-251205T1900Z/
/O.CON.KMTR.CW.Y.0001.000000T0000Z-251205T1600Z/
East Bay Interior Valleys-
704 AM PST Fri Dec 5 2025
...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM PST THIS MORNING...
...COLD WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM PST THIS
MORNING...
* WHAT...For the Dense Fog Advisory, visibility one quarter mile or
less in dense fog. For the Cold Weather Advisory, very cold
conditions with temperatures 33 to 36 degrees.
* WHERE...East Bay Interior Valleys.
* WHEN...For the Dense Fog Advisory, until 11 AM PST this morning.
For the Cold Weather Advisory, until 8 AM PST this morning.
* IMPACTS...Cold conditions will be hazardous to sensitive
populations such as unhoused individuals. Prolonged exposure to the
cold conditions will lead to hypothermia for people, pets, and
livestock. Cold conditions may damage or kill sensitive crops,
plants, and vegetation if appropriate precautions are not taken.
Low visibility could make driving conditions hazardous.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Ensure portable heaters are working properly and are used correctly
to avoid sparking a fire indoors. Do not use generators or grills
inside as carbon monoxide poisoning can result.
Check with your local, city, or county officials for information on
available warming centers.
Be sure to dress in layers if outdoors. Make sure that pets and
livestock have adequate food, unfrozen water, and warmth. Cover or
tend to sensitive crops, plants, and vegetation.
If driving, slow down, use your headlights, and leave plenty of
distance ahead of you.
&&
$$
Coastal Flood Advisory
Coastal Hazard Message
National Weather Service San Francisco CA
443 AM PST Fri Dec 5 2025
CAZ006-506-508-529-530-052300-
/O.CON.KMTR.CF.Y.0016.000000T0000Z-251207T2300Z/
San Francisco-North Bay Interior Valleys-
San Francisco Bay Shoreline-Northern Monterey Bay-
Southern Monterey Bay and Big Sur Coast-
443 AM PST Fri Dec 5 2025
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST
SUNDAY...
* WHAT...Up to 1.4 ft of inundation above ground level is
possible in low lying areas near shorelines and tidal
waterways.
* WHERE...Bayshore locations along San Francisco and Monterey
Bay.
* WHEN...Until 3 PM PST Sunday.
* IMPACTS...Flooding of lots, parks, and roads with only
isolated road closures expected.
* ADDITIONAL DETAILS...The San Francisco tidal gauge high tide
is expected to be 1.4 ft above normal (7.23 ft MLLW) at 10:35
AM Friday, 1.2 ft above normal (7.08 ft MLLW) at 11:25 AM
Saturday, and 0.9 ft above normal (6.75 ft MLLW) at 12:17 PM
Sunday. High tide timing varies up to 90 minutes earlier or
later along the Pacific Coast and throughout the San Francisco
Bay respectively.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If travel is required, allow extra time as some roads may be
closed. Do not drive around barricades or through water of
unknown depth. Take the necessary actions to protect flood-prone
property.
&&
$$
Coastal Hazard Message
National Weather Service Eureka CA
131 AM PST Fri Dec 5 2025
CAZ103-051745-
/O.CON.KEKA.CF.Y.0010.251205T1800Z-251205T2000Z/
Northern Humboldt Coast-
131 AM PST Fri Dec 5 2025
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM 10 AM THIS
MORNING TO NOON PST TODAY...
* WHAT...High astronomical tides will cause minor flooding in low
lying areas around Humboldt Bay. Up to one half foot of
saltwater inundation above ground level is possible near
shorelines and tidal waterways. Between 9.1 and 9.3 feet MLLW
at the North Spit tide gauge is predicted.
* WHERE...Northern Humboldt Coast County.
* WHEN...From 10 AM to noon PST Friday. High tide is at 10:55 AM
at the Humboldt Bay North Spit tide gauge. Saltwater inundation
will be possible 1 to 2 hours before and after high tide.
* IMPACTS...Flooding of low lying areas around Humboldt Bay
including parks and roads with only isolated closures
expected. Flooding will likely impact Jackson Ranch Road in
the Arcata Bottoms and several roads in King Salmon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Coastal Flood Advisory indicates that onshore winds and tides
will combine to generate flooding of low areas along the shore.
Feet Above Ground is locally defined as feet above the Highest
Astronomical Tide or HAT.
&&
$$
Dense Fog Advisory
URGENT - WEATHER MESSAGE
National Weather Service San Francisco CA
704 AM PST Fri Dec 5 2025
CAZ510-051900-
/O.NEW.KMTR.FG.Y.0032.251205T1504Z-251205T1900Z/
/O.CON.KMTR.CW.Y.0001.000000T0000Z-251205T1600Z/
East Bay Interior Valleys-
704 AM PST Fri Dec 5 2025
...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM PST THIS MORNING...
...COLD WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM PST THIS
MORNING...
* WHAT...For the Dense Fog Advisory, visibility one quarter mile or
less in dense fog. For the Cold Weather Advisory, very cold
conditions with temperatures 33 to 36 degrees.
* WHERE...East Bay Interior Valleys.
* WHEN...For the Dense Fog Advisory, until 11 AM PST this morning.
For the Cold Weather Advisory, until 8 AM PST this morning.
* IMPACTS...Cold conditions will be hazardous to sensitive
populations such as unhoused individuals. Prolonged exposure to the
cold conditions will lead to hypothermia for people, pets, and
livestock. Cold conditions may damage or kill sensitive crops,
plants, and vegetation if appropriate precautions are not taken.
Low visibility could make driving conditions hazardous.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Ensure portable heaters are working properly and are used correctly
to avoid sparking a fire indoors. Do not use generators or grills
inside as carbon monoxide poisoning can result.
Check with your local, city, or county officials for information on
available warming centers.
Be sure to dress in layers if outdoors. Make sure that pets and
livestock have adequate food, unfrozen water, and warmth. Cover or
tend to sensitive crops, plants, and vegetation.
If driving, slow down, use your headlights, and leave plenty of
distance ahead of you.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Sacramento CA
1012 PM PST Thu Dec 4 2025
CAZ015>019-051900-
/O.NEW.KSTO.FG.Y.0014.251205T0612Z-251205T1900Z/
Northern Sacramento Valley-Central Sacramento Valley-Southern
Sacramento Valley-Carquinez Strait and Delta-Northern San Joaquin
Valley-
Including the cities of Red Bluff, Oroville, Fairfield/Suisun,
Chico, Stockton, Redding, Marysville/Yuba City, Modesto, and
Sacramento
1012 PM PST Thu Dec 4 2025
...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM PST FRIDAY...
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...Carquinez Strait and Delta, Sacramento Valley, and
Northern San Joaquin Valley.
* WHEN...Until 11 AM PST Friday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* ADDITIONAL DETAILS...Find the latest road conditions at
quickmap.dot.ca.gov
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If driving, slow down, use your headlights, and leave plenty of
distance ahead of you.
&&
$$
For more information, visit us at www.weather.gov/sto/
NR
Small Craft Advisory
URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
233 AM PST Fri Dec 5 2025
PZZ475-051845-
/O.CON.KEKA.SC.Y.0131.000000T0000Z-251206T0700Z/
Cape Mendocino to Pt Arena 10 to 60 nm-
233 AM PST Fri Dec 5 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 11 PM PST THIS
EVENING...
* WHAT...Northwest winds 10 to 20 kt with gusts up to 30 kt and
seas 6 to 8 feet.
* WHERE...Cape Mendocino to Pt Arena 10 to 60 nm.
* WHEN...Until 11 PM PST this evening.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service San Francisco Bay Area
216 AM PST Fri Dec 5 2025
PZZ540-051830-
/O.CON.KMTR.SC.Y.0212.251205T1700Z-251206T1100Z/
Coastal Waters from Point Arena to Point Reyes California out to
10 NM-
216 AM PST Fri Dec 5 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 9 AM THIS MORNING
TO 3 AM PST SATURDAY...
* WHAT...Northwest winds 10 to 20 kt expected.
* WHERE...Coastal Waters from Point Arena to Point Reyes
California out to 10 NM.
* WHEN...From 9 AM this morning to 3 AM PST Saturday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
For more information from the National Weather Service visit
http://weather.gov/sanfrancisco
URGENT - MARINE WEATHER MESSAGE
National Weather Service San Francisco Bay Area
216 AM PST Fri Dec 5 2025
PZZ570-051830-
/O.EXT.KMTR.SC.Y.0212.000000T0000Z-251207T0500Z/
Waters from Point Arena to Point Reyes 10-60 NM-
216 AM PST Fri Dec 5 2025
...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 9 PM PST SATURDAY...
* WHAT...Northwest winds 15 to 25 kt with gusts up to 30 kt.
* WHERE...Waters from Point Arena to Point Reyes 10-60 NM.
* WHEN...Until 9 PM PST Saturday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service San Francisco Bay Area
216 AM PST Fri Dec 5 2025
PZZ571-051830-
/O.EXT.KMTR.SC.Y.0212.000000T0000Z-251207T1100Z/
Waters from Point Reyes to Pigeon Point 10-60 NM-
216 AM PST Fri Dec 5 2025
...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 3 AM PST SUNDAY...
* WHAT...Northwest winds 15 to 25 kt with gusts up to 30 kt.
* WHERE...Waters from Point Reyes to Pigeon Point 10-60 NM.
* WHEN...Until 3 AM PST Sunday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service San Francisco Bay Area
216 AM PST Fri Dec 5 2025
PZZ575-051830-
/O.EXT.KMTR.SC.Y.0212.251205T1100Z-251207T1100Z/
Waters from Pigeon Point to Point Pinos 10-60 NM-
216 AM PST Fri Dec 5 2025
...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 3 AM PST SUNDAY...
* WHAT...North winds 10 to 20 kt expected.
* WHERE...Waters from Pigeon Point to Point Pinos 10-60 NM.
* WHEN...Until 3 AM PST Sunday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
Frost Advisory
URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
630 AM PST Fri Dec 5 2025
CAZ112-113-051600-
/O.NEW.KEKA.FR.Y.0039.251205T1430Z-251205T1600Z/
Southwestern Mendocino Interior-Southeastern Mendocino Interior-
Including Redwood Valley, Comptche, Ukiah, Boonville, Yorkville,
Philo, Talmage, Hopland, and Calpella
630 AM PST Fri Dec 5 2025
...FROST ADVISORY IN EFFECT UNTIL 8 AM PST THIS MORNING...
* WHAT...Temperatures as low as 36 will result in frost formation.
* WHERE...Southern Mendocino Interior.
* WHEN...Until 8 AM PST this morning.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Take steps now to protect tender plants from the cold.
&&
$$
For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka
