Alert archive / California / River Flood Warnings in 2023

River Flood Warning 8, NWS San Francisco Bay Area, CA

January 11, 2023Sonoma County, California

NWS San Francisco Bay Area, CA issued this river flood warning at Jan 11, 2023, 10:19 AM PST for Sonoma County, California. It took effect at Jan 12, 2023, 9:30 AM PST. It was in force for .

The area

The counties it named.

The facts

Issued: Jan 11, 2023, 10:19 AM PST (18:19 UTC)
In effect from: Jan 12, 2023, 9:30 AM PST
Expired: Jan 11, 2023, 10:15 PM PST
In force
Issued by: NWS San Francisco Bay Area, CA
Area: Storm-based polygon
Flood severity: Minor

County Sonoma County, CA

The radar

The Sacramento radar (KDAX), 108 km from the middle of the area, began a volume at 18:19 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 river

Written for the forecast point Russian River at Guerneville (GUEC1). The gauge peaked at 31.24 ft at Jan 10, 2023, 10:00 AM PST.

Action stage: 29 ft
Minor stage: 32 ft
Moderate stage: 35 ft
Major stage: 40 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 11467002, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

The local office's own words before this river flood warning 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 river flood warning went out at Jan 11, 4:36 AM PST, 5 hours 43 minutes earlier.

Area forecast discussion, Jan 11, 4:36 AM PST, 5 hours 43 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
Jan 10, 4:58 PM PST	Special Weather Statement	MTR	Sonoma	32 min
Jan 10, 5:36 PM PST	Special Weather Statement	MTR	Sonoma	39 min
Jan 10, 6:28 PM PST	Areal Flood Advisory	MTR	Sonoma	3 hr
Jan 10, 7:13 PM PST	Special Weather Statement	MTR	Alameda	32 min
Jan 10, 7:31 PM PST	High Surf Advisory	MTR	Marin, Monterey, City and County of San Francisco, San Mateo, Santa Cruz, Sonoma	6 hr
Jan 10, 8:13 PM PST	Special Weather Statement	MTR	Alameda	32 min
Jan 10, 9:07 PM PST	Special Marine Warning	MTR		23 min
Jan 10, 9:13 PM PST	Special Marine Warning	MTR		32 min
Jan 10, 9:23 PM PST	Special Weather Statement	MTR	Contra Costa	37 min
Jan 10, 9:57 PM PST	Special Weather Statement	MTR	Marin	33 min
Jan 10, 10:04 PM PST	Special Weather Statement	MTR	Contra Costa	26 min
Jan 10, 10:35 PM PST	Special Weather Statement	MTR	Santa Clara	25 min
Jan 10, 10:44 PM PST	Special Weather Statement	MTR	Santa Clara	31 min
Jan 10, 10:55 PM PST	Special Weather Statement	MTR	Contra Costa	35 min
Jan 10, 11:02 PM PST	Special Weather Statement	MTR	Santa Clara	28 min
Jan 10, 11:33 PM PST	Special Weather Statement	MTR	Contra Costa	27 min
Jan 11, 12:41 AM PST	Flood Watch	MTR	Marin, Napa, Sonoma	22 hr
Jan 11, 2:04 AM PST	Wind Advisory	MTR	Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 5 more	17 hr
Jan 11, 2:34 AM PST	High Surf Advisory	MTR	Marin, Monterey, City and County of San Francisco, San Mateo, Santa Cruz, Sonoma	40 hr
Jan 11, 2:42 AM PST	Gale Warning	MTR		54 hr
Jan 11, 2:07 PM PST	Areal Flood Advisory	MTR	Marin, City and County of San Francisco, San Mateo	7 hr
Jan 11, 2:38 PM PST	Areal Flood Advisory	MTR	San Mateo, Santa Clara, Santa Cruz	6 hr
Jan 11, 3:18 PM PST	Areal Flood Warning	MTR	Sonoma	33 hr
Jan 11, 3:25 PM PST	Areal Flood Advisory	MTR	Alameda, Contra Costa, City and County of San Francisco	6 hr

Nearby

River Flood Warnings in California, 2023 Every river flood warning in 2023

Sources

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