Alert archive / Nevada / Red Flag Warnings in 2026
Red Flag Warning 12, NWS Reno, NV
NWS Reno, NV issued this red flag warning at Sep 11, 2026, 10:18 AM PDT for 7 counties in Nevada; 4 counties in California. It took effect at Sep 12, 2026, 11:00 AM PDT. It was in force for 13 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, 10:18 AM PDT (17:18 UTC)
- In effect from
- Sep 12, 2026, 11:00 AM PDT
- Expired
- Sep 13, 2026, 12:13 AM PDT
- In force
- 13 hr
- Issued by
- NWS Reno, NV
Counties Lassen County, CA, Madera County, CA, Modoc County, CA, Mono County, CA, Churchill County, NV, Douglas County, NV, Lyon County, NV, Mineral County, NV, Pershing County, NV, Storey County, NV, Washoe County, NV
The radar
The Reno radar (KRGX), 34 km from the middle of the area, began a volume at 17:24 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, 5.3 hours before the alert went out and 312 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
What forecasters said that day
The local office's own words before this red flag warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Reno, NV wrote its last area forecast discussion before this red flag warning went out at Sep 10, 2:28 PM PDT, 19 hours 50 minutes earlier.
Area forecast discussion, Sep 10, 2:28 PM PDT, 19 hours 50 minutes before
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Red Flag Warnings in Nevada, 2026Red 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.