Marin County, CA Weather Alerts
Every National Weather Service alert issued for Marin County, California, pushed to your phone within moments — county code CAC041, forecast zone 3 zones (CAZ506, CAZ505, CAZ502). Free with StormCast.
Download on Google PlayHow the NWS identifies Marin County
These are the identifiers the National Weather Service uses when it issues a warning here. StormCast watches CAC041 directly rather than matching on place names, which is why an alert arrives whether you are in Belvedere Tiburon or anywhere else in the county.
NWS County Code
CAC041
Forecast Zones
3 zones (CAZ506, CAZ505, CAZ502)
Forecast Office
Monterey (MTR)
Radar Station
KDAX
Towns covered in Marin County
An NWS alert for Marin County applies to all 26 of these communities. You do not need a separate alert for each one.
River gauges in and around Marin County
StormCast tracks 12 gauges near Marin County. Set a flood-stage alert on any of them to get notified before the water reaches you.
- Fairfax Creek at Sunnyside
- Fairfax Creek at RVFD Station 21
- Sleepy Hollow Creek at RVFD Fire Station 20
- Lagunitas Creek at Samuel P. Taylor State Park
- San Anselmo Creek at Bridge Street
- Corte Madera Creek at Ross
- Bolinas Lagoon Bolinas tide gage
- Novato Creek at Novato (ALERT)
- Novato Creek at Novato (USGS)
- Novato Creek at Pacheco and San Jose Creeks
- Olema Creek at Vedanta Bridge
- Lagunitas Creek near Pt. Reyes Station
Current conditions
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Alert types issued for Marin 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 →Marin County weather alert questions
Which NWS forecast zone is Marin County in?
Marin County, California is NWS county code CAC041 and spans 3 forecast zones (CAZ506, CAZ505, CAZ502). Alerts for it are issued by the Monterey (MTR) Weather Forecast Office, and the nearest NEXRAD radar is KDAX.
Which towns in Marin County are covered?
All of them. NWS alerts are issued at the county and zone level, so a warning for Marin County covers every community inside it, including Belvedere Tiburon, Bolinas, Corte Madera, Dillon Beach, Fairfax, Forest Knolls, Greenbrae, Inverness, Kentfield, Lagunitas, Larkspur, Marshall, Mill Valley, Nicasio, Novato, Olema, Point Reyes Station, Ross, San Anselmo, San Geronimo, San Quentin, San Rafael, Sausalito, Stinson Beach, Tomales and Woodacre.
Are there river gauges in Marin County?
Yes — StormCast monitors 12 river gauges in and around Marin County, including Fairfax Creek at Sunnyside, Fairfax Creek at RVFD Station 21, Sleepy Hollow Creek at RVFD Fire Station 20. 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 Marin County delivered?
StormCast polls the NWS alert feed every 30 seconds. When a warning is issued for CAC041, the push notification goes out within moments — even with your screen off.