Sierra County, CA Weather Alerts
Every National Weather Service alert issued for Sierra County, California, pushed to your phone within moments — county code CAC091, forecast zone 3 zones (CAZ071, CAZ132, CAZ133). Free with StormCast.
Download on Google PlayHow the NWS identifies Sierra County
These are the identifiers the National Weather Service uses when it issues a warning here. StormCast watches CAC091 directly rather than matching on place names, which is why an alert arrives whether you are in Alleghany or anywhere else in the county.
NWS County Code
CAC091
Forecast Zones
3 zones (CAZ071, CAZ132, CAZ133)
Forecast Office
Sacramento (STO)
Radar Station
KBBX
Towns covered in Sierra County
An NWS alert for Sierra County applies to all 7 of these communities. You do not need a separate alert for each one.
River gauges in and around Sierra County
StormCast tracks 10 gauges near Sierra County. Set a flood-stage alert on any of them to get notified before the water reaches you.
- Independence Creek (California) at Independence Lake
- Middle Fork Feather River near Portola
- Sagehen Creek nr Truckee
- Donner Creek at Donner Lk Nr Truckee
- Little Truckee River at Stampede Reservoir
- Donner Creek near Truckee
- Prosser Creek at Prosser Creek Reservoir
- Truckee River near Truckee
- Little Truckee River at Boca Reservoir
- Truckee River at Farad
Current conditions
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Alert types issued for Sierra 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 →Sierra County weather alert questions
Which NWS forecast zone is Sierra County in?
Sierra County, California is NWS county code CAC091 and spans 3 forecast zones (CAZ071, CAZ132, CAZ133). Alerts for it are issued by the Sacramento (STO) Weather Forecast Office, and the nearest NEXRAD radar is KBBX.
Which towns in Sierra County are covered?
All of them. NWS alerts are issued at the county and zone level, so a warning for Sierra County covers every community inside it, including Alleghany, Calpine, Downieville, Goodyears Bar, Loyalton, Sierra City and Sierraville.
Are there river gauges in Sierra County?
Yes — StormCast monitors 10 river gauges in and around Sierra County, including Independence Creek (California) at Independence Lake, Middle Fork Feather River near Portola, Sagehen Creek nr Truckee. 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 Sierra County delivered?
StormCast polls the NWS alert feed every 30 seconds. When a warning is issued for CAC091, the push notification goes out within moments — even with your screen off.