Alameda County, CA Weather Alerts
Every National Weather Service alert issued for Alameda County, California, pushed to your phone within moments — county code CAC001, forecast zone 3 zones (CAZ508, CAZ510, CAZ515). Free with StormCast.
Download on Google PlayHow the NWS identifies Alameda County
These are the identifiers the National Weather Service uses when it issues a warning here. StormCast watches CAC001 directly rather than matching on place names, which is why an alert arrives whether you are in Alameda or anywhere else in the county.
NWS County Code
CAC001
Forecast Zones
3 zones (CAZ508, CAZ510, CAZ515)
Forecast Office
Monterey (MTR)
Radar Station
KMUX
Towns covered in Alameda County
An NWS alert for Alameda County applies to all 17 of these communities. You do not need a separate alert for each one.
River gauges in and around Alameda County
StormCast tracks 12 gauges near Alameda County. Set a flood-stage alert on any of them to get notified before the water reaches you.
- Cull Creek above Cull Creek Reservoir near Castro Valley
- Castro Valley Creek at Hayward
- San Lorenzo Creek (Alameda) above Hayward
- Crow Creek near Hayward
- San Lorenzo Creek (Alameda) above Don Castro Reservoir near Castro Valley
- San Lorenzo Creek (Alameda) at San Lorenzo
- Upper San Leandro Reservoir
- San Ramon Creek at San Ramon
- Dry Creek at Union City
- Dublin Creek - Interstate 680
- Alameda Creek Flood Channel at Union City
- Line J1 below Dublin Blvd
Current conditions
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Alert types issued for Alameda County
Tornado
Tornado Warning, Tornado Watch, Tornado Emergency and Severe Thunderstorm Warning.
How tornado alerts work →Flooding
Flash Flood Warning, Flood Watch, Flood Advisory and River Flood Warning.
How flood alerts work →Winter
Winter Storm Warning, Ice Storm Warning, Blizzard Warning and Winter Weather Advisory.
Winter warnings explained →Fire Weather
Red Flag Warning and Fire Weather Watch when conditions favor rapid fire spread.
Fire weather alerts →Heat & Cold
Excessive Heat Warning, Heat Advisory, Freeze Warning and Frost Advisory.
Frost & freeze alerts →Alameda County weather alert questions
Which NWS forecast zone is Alameda County in?
Alameda County, California is NWS county code CAC001 and spans 3 forecast zones (CAZ508, CAZ510, CAZ515). Alerts for it are issued by the Monterey (MTR) Weather Forecast Office, and the nearest NEXRAD radar is KMUX.
Which towns in Alameda County are covered?
All of them. NWS alerts are issued at the county and zone level, so a warning for Alameda County covers every community inside it, including Alameda, Albany, Berkeley, Castro Valley, Dublin, Emeryville, Fremont, Hayward, Livermore, Newark, Oakland, Piedmont, Pleasanton, San Leandro, San Lorenzo, Sunol and Union City.
Are there river gauges in Alameda County?
Yes — StormCast monitors 12 river gauges in and around Alameda County, including Cull Creek above Cull Creek Reservoir near Castro Valley, Castro Valley Creek at Hayward, San Lorenzo Creek (Alameda) above Hayward. You can set a flood-stage alert on any of them and get a push notification when the water rises.
How fast are alerts for Alameda County delivered?
StormCast polls the NWS alert feed every 30 seconds. When a warning is issued for CAC001, the push notification goes out within moments — even with your screen off.