Alert archive / California / High Surf Advisories in 2025

High Surf Advisory 5, NWS San Francisco Bay Area, CA

December 25, 20256 counties in California

NWS San Francisco Bay Area, CA issued this high surf advisory at Dec 25, 2025, 2:47 PM PST for 6 counties in California. It took effect at Dec 26, 2025, 4:00 AM PST. It was in force for 18 hr.

The area

The counties it named.

The facts

Issued: Dec 25, 2025, 2:47 PM PST (22:47 UTC)
In effect from: Dec 26, 2025, 4:00 AM PST
Expired: Dec 26, 2025, 10:00 PM PST
In force: 18 hr
Issued by: NWS San Francisco Bay Area, CA

Counties City and County of San Francisco, CA, Marin County, CA, Monterey County, CA, San Mateo County, CA, Santa Cruz County, CA, Sonoma County, CA

The radar

The San Francisco radar (KMUX), 53 km from the middle of the area, began a volume at 22:49 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Oakland, CA (KOAK), launched 12:00Z, 10.8 hours before the alert went out and 26 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 596 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 268 m²/s²
0-3 km storm-relative helicity: 293 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this high surf advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS San Francisco Bay Area, CA wrote its last area forecast discussion before this high surf advisory went out at Dec 25, 12:22 PM PST, 2 hours 25 minutes earlier.

Area forecast discussion, Dec 25, 12:22 PM PST, 2 hours 25 minutes before

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In the hours before

Special weather statement, Dec 25, 10:32 AM PST, 4 hours 15 minutes before

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Special weather statement, Dec 25, 10:39 AM PST, 4 hours 8 minutes before

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Local storm report, Dec 25, 11:46 AM PST, 3 hours 1 minute before

Preliminary Local Storm Report
National Weather Service San Francisco CA
1146 AM PST Thu Dec 25 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1135 AM     Non-Tstm Wnd Dmg 12 WNW Monte Rio        38.53N 123.22W
12/25/2025                   Sonoma             CA   Law Enforcement

            CHP is reporting a tree down near Seaview
            and Fort Ross Roads.

&&

Palmer

Local storm report, Dec 25, 1:07 PM PST, 1 hour 40 minutes before

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Local storm report, Dec 25, 1:14 PM PST, 1 hour 33 minutes before

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Special weather statement, Dec 25, 1:25 PM PST, 1 hour 22 minutes before

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The office that day

Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 24, 5:11 PM PST	Special Marine Warning	MTR		49 min
Dec 24, 5:15 PM PST	Special Weather Statement	MTR	Alameda	30 min
Dec 24, 5:18 PM PST	Special Marine Warning	MTR		27 min
Dec 24, 5:45 PM PST	Special Marine Warning	MTR		30 min
Dec 24, 6:06 PM PST	Severe Thunderstorm Warning Considerable damage threat	MTR	Monterey	24 min
Dec 24, 6:20 PM PST	Severe Thunderstorm Warning Considerable damage threat	MTR	Monterey	16 min
Dec 24, 7:05 PM PST	Special Marine Warning	MTR		10 min
Dec 24, 7:39 PM PST	Special Weather Statement	MTR	San Mateo	36 min
Dec 24, 7:41 PM PST	Special Marine Warning	MTR		34 min
Dec 25, 12:11 AM PST	Special Marine Warning	MTR		34 min
Dec 25, 12:17 AM PST	Areal Flood Advisory	MTR	San Mateo, Santa Clara, Santa Cruz	8 hr
Dec 25, 12:59 AM PST	Special Marine Warning	MTR		31 min
Dec 25, 1:03 AM PST	Areal Flood Advisory	MTR	City and County of San Francisco, San Mateo	7 hr
Dec 25, 1:34 AM PST	Special Marine Warning	MTR		26 min
Dec 25, 1:54 AM PST	Special Marine Warning	MTR		36 min
Dec 25, 2:00 AM PST	Special Marine Warning	MTR		15 min
Dec 25, 2:01 AM PST	Flash Flood Warning Considerable damage threat	MTR	San Mateo	3 hr
Dec 25, 2:19 AM PST	Severe Thunderstorm Warning Considerable damage threat	MTR	City and County of San Francisco, San Mateo	26 min
Dec 25, 2:48 AM PST	Areal Flood Advisory	MTR	Alameda, Contra Costa, Santa Clara	5 hr
Dec 25, 2:48 AM PST	Severe Thunderstorm Warning Considerable damage threat	MTR	San Mateo, Santa Cruz	27 min
Dec 25, 2:56 AM PST	Flash Flood Warning Considerable damage threat	MTR	City and County of San Francisco, San Mateo	2 hr
Dec 25, 3:01 AM PST	Flash Flood Warning	MTR	Alameda, Contra Costa	3 hr
Dec 25, 3:11 AM PST	Flash Flood Warning Considerable damage threat	MTR	San Mateo, Santa Clara	3 hr
Dec 25, 3:12 AM PST	Severe Thunderstorm Warning Considerable damage threat	MTR	Alameda, San Mateo, Santa Clara, Santa Cruz	33 min
Dec 25, 3:17 AM PST	Areal Flood Advisory	MTR	Santa Cruz	4 hr
Dec 25, 3:20 AM PST	Areal Flood Advisory	MTR	Napa	5 hr
Dec 25, 4:46 AM PST	Areal Flood Advisory	MTR	Monterey	3 hr
Dec 25, 6:02 AM PST	Areal Flood Advisory	MTR	Santa Clara	3 hr
Dec 25, 7:08 AM PST	Special Weather Statement	MTR	Sonoma	37 min
Dec 25, 7:53 AM PST	Special Weather Statement	MTR	Sonoma	37 min
Dec 25, 7:56 AM PST	Special Weather Statement	MTR	Napa, Sonoma	34 min
Dec 25, 9:13 AM PST	Special Weather Statement	MTR	Sonoma	47 min
Dec 25, 10:32 AM PST	Special Weather Statement	MTR	Marin	43 min
Dec 25, 10:39 AM PST	Special Weather Statement	MTR	Sonoma	36 min
Dec 25, 11:16 AM PST	Special Marine Warning	MTR		29 min
Dec 25, 11:41 AM PST	Special Marine Warning	MTR		34 min
Dec 25, 12:00 PM PST	Special Marine Warning	MTR		45 min
Dec 25, 12:09 PM PST	Special Marine Warning	MTR		31 min
Dec 25, 12:19 PM PST	Tornado Warning	MTR	Santa Cruz	31 min
Dec 25, 12:34 PM PST	Special Marine Warning	MTR		56 min
Dec 25, 12:58 PM PST	Special Marine Warning	MTR		62 min
Dec 25, 1:25 PM PST	Special Weather Statement	MTR	Santa Cruz	35 min
Dec 25, 3:29 PM PST	Special Marine Warning	MTR		61 min
Dec 25, 3:33 PM PST	Special Marine Warning	MTR		42 min

Nearby

High Surf Advisories in California, 2025 Every high surf advisory in 2025

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.