Alert archive / California / Red Flag Warnings in 2026
Red Flag Warning 4, NWS Eureka, CA
NWS Eureka, CA issued this red flag warning at Jul 19, 2026, 3:37 PM PDT for Humboldt County, Siskiyou County, Trinity County, California. It took effect at Jul 19, 2026, 9:00 PM PDT. It was in force for 21 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
- Jul 19, 2026, 3:37 PM PDT (22:37 UTC)
- In effect from
- Jul 19, 2026, 9:00 PM PDT
- Expired
- Jul 20, 2026, 6:00 PM PDT
- In force
- 21 hr
- Issued by
- NWS Eureka, CA
Counties Humboldt County, CA, Siskiyou County, CA, Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 107 km from the middle of the area, began a volume at 22:39 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, 10.6 hours before the alert went out and 372 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
- 1540 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 42 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
172 WWUS86 KEKA 192237 RFWEKA Urgent - Fire Weather Message National Weather Service Eureka CA 337 PM PDT Sun Jul 19 2026 CAZ403-406-409>412-201600- /O.NEW.KEKA.FW.W.0004.260720T0400Z-260721T0100Z/ Northeastern Interior Humboldt and Southwestern Siskiyou Including Orleans- Eastern Interior Humboldt Including Willow Creek and Hoopa- Northwestern Trinity Including Salyer and Big Bar- Northeastern Trinity Including Trinity Lake- Eastern Trinity Including Weaverville and Hayfork- Southern Trinity Including Ruth Lake and the Yolla Bollys- 337 PM PDT Sun Jul 19 2026 ...RED FLAG WARNING IN EFFECT FROM 9 PM THIS EVENING TO 6 PM PDT MONDAY... The National Weather Service in Eureka has issued a Red Flag Warning, which is in effect from 9 PM this evening to 6 PM PDT Monday. * AFFECTED AREA...Interior Humboldt County, Trinity County, and southwestern Siskiyou County. * THUNDERSTORMS...Isolated dry thunderstorms tonight into Monday afternoon. Confidence is highest tonight but some activity may continue into the afternoon. * OUTFLOW WINDS...Gusty and erratic outflow winds of up to 30 mph is possible. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/eureka
3 follow-up statements
023 WWUS86 KEKA 201531 RFWEKA Urgent - Fire Weather Message National Weather Service Eureka CA 831 AM PDT Mon Jul 20 2026 CAZ403-406-409>412-202345- /O.CON.KEKA.FW.W.0004.000000T0000Z-260721T0100Z/ Northeastern Interior Humboldt and Southwestern Siskiyou Including Orleans- Eastern Interior Humboldt Including Willow Creek and Hoopa- Northwestern Trinity Including Salyer and Big Bar- Northeastern Trinity Including Trinity Lake- Eastern Trinity Including Weaverville and Hayfork- Southern Trinity Including Ruth Lake and the Yolla Bollys- 831 AM PDT Mon Jul 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM PDT THIS EVENING... * AFFECTED AREA...Interior Humboldt County, Trinity County, and southwestern Siskiyou County. * THUNDERSTORMS...Isolated dry thunderstorms possible through this afternoon. Confidence is low. * OUTFLOW WINDS...Gusty and erratic outflow winds of up to 30 mph is possible. * IMPACTS...any fires that develop will likely spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/eureka
053 WWUS86 KEKA 202320 RFWEKA Urgent - Fire Weather Message National Weather Service Eureka CA 420 PM PDT Mon Jul 20 2026 CAZ403-406-409>412-210100- /O.CON.KEKA.FW.W.0004.000000T0000Z-260721T0100Z/ Northeastern Interior Humboldt and Southwestern Siskiyou Including Orleans- Eastern Interior Humboldt Including Willow Creek and Hoopa- Northwestern Trinity Including Salyer and Big Bar- Northeastern Trinity Including Trinity Lake- Eastern Trinity Including Weaverville and Hayfork- Southern Trinity Including Ruth Lake and the Yolla Bollys- 420 PM PDT Mon Jul 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM PDT THIS EVENING... * AFFECTED AREA...Interior Humboldt County, Trinity County, and southwestern Siskiyou County. * THUNDERSTORMS...Isolated dry thunderstorms possible through this afternoon. Confidence is low. * OUTFLOW WINDS...Gusty and erratic outflow winds of up to 30 mph is possible. * IMPACTS...any fires that develop will likely spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/eureka
414 WWUS86 KEKA 210034 RFWEKA Urgent - Fire Weather Message National Weather Service Eureka CA 534 PM PDT Mon Jul 20 2026 CAZ403-406-409>412-210145- /O.EXP.KEKA.FW.W.0004.000000T0000Z-260721T0100Z/ Northeastern Interior Humboldt and Southwestern Siskiyou Including Orleans- Eastern Interior Humboldt Including Willow Creek and Hoopa- Northwestern Trinity Including Salyer and Big Bar- Northeastern Trinity Including Trinity Lake- Eastern Trinity Including Weaverville and Hayfork- Southern Trinity Including Ruth Lake and the Yolla Bollys- 534 PM PDT Mon Jul 20 2026 ...RED FLAG WARNING WILL EXPIRE AT 6 PM PDT THIS EVENING... $$ http://weather.gov/eureka
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.