Alameda County weather alerts

There are no active weather alerts for Alameda County, CA right now.

Since 2016 the National Weather Service has issued about 144 alerts that included Alameda County, roughly 14 a year. The most common is the flood advisory (111 from 2016 to 2025). No tornado warnings were recorded here in that period. 3 tornadoes have touched down in the county since 1950.

Updated 11:00 AM PST from the National Weather Service · lists refresh hourly; the live map loads current alerts directly from the NWS

No warnings, watches or advisories include Alameda County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Stanislaus County, San Joaquin County, Contra Costa County, San Francisco County.

Map data: NWS, OpenFreeMap, OpenStreetMap

Alameda County alert history

Alert events that included Alameda County or its forecast zones, from the NWS warning archive.

Alert type	2016–2025	2026	Last issued
Flood Advisory	111	7	November 13, 2026
Flood Warning	14	0	February 13, 2025
Flash Flood Warning	13	0	December 25, 2025
Severe Thunderstorm Warning	6	0	December 25, 2025

Tornado history in Alameda County

3 tornadoes have been recorded in Alameda County since 1950. That ranks 38 of 58 counties in California. The most recent was on April 25, 1994 (rated F0).

Tornadoes by (E)F rating

Strongest tornadoes in Alameda County

Date	Rating	County	Path length	Width
April 25, 1994	F0	Alameda County	0.7 mi	30 yd
December 17, 1992	F0	Alameda County	0.2 mi	23 yd
March 29, 1982	F0	Alameda County	0.1 mi	10 yd

Most recent tornadoes

Date	Rating	County	Path length	Width
April 25, 1994	F0	Alameda County	0.7 mi	30 yd
December 17, 1992	F0	Alameda County	0.2 mi	23 yd
March 29, 1982	F0	Alameda County	0.1 mi	10 yd

California tornado history and map →

About Alameda County

Population: 1,649,060 (2024 estimate)
State: California
NOAA Weather Radio SAME code: 006001 (how to use it)
Cities: Oakland, Fremont, Hayward, Berkeley