Alert archive / California / Red Flag Warnings in 2026
Red Flag Warning 5, NWS Sacramento, CA
NWS Sacramento, CA issued this red flag warning at Sep 11, 2026, 10:02 AM PDT for 10 counties in California. It took effect at Sep 12, 2026, 11:00 AM PDT. It was in force for 54 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 11, 2026, 10:02 AM PDT (17:02 UTC)
- In effect from
- Sep 12, 2026, 11:00 AM PDT
- Expired
- Sep 14, 2026, 5:00 PM PDT
- In force
- 54 hr
- Issued by
- NWS Sacramento, CA
Counties Butte County, CA, Colusa County, CA, Glenn County, CA, Nevada County, CA, Placer County, CA, Plumas County, CA, Shasta County, CA, Sutter County, CA, Tehama County, CA, Yuba County, CA
The radar
The Beale AFB radar (KBBX), 12 km from the middle of the area, began a volume at 17:05 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 nearest sounding before it
Oakland, CA (KOAK), launched 12:00Z, 5.0 hours before the alert went out and 215 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1854 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
Nearby
Red Flag Warnings in California, 2026Every red flag warning in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.