Alert archive / California / Red Flag Warnings in 2026
Red Flag Warning 2, NWS Eureka, CA
NWS Eureka, CA issued this red flag warning at Jun 18, 2026, 11:55 AM PDT for Humboldt County, Siskiyou County, Trinity County, California. It took effect at Jun 19, 2026, 8:00 AM PDT. It was in force for 11 hr. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jun 18, 2026, 11:55 AM PDT (18:55 UTC)
- In effect from
- Jun 19, 2026, 8:00 AM PDT
- Expired
- Jun 19, 2026, 7:00 PM PDT
- In force
- 11 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 18:56 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 19, 3:10 PM PDT | HAIL 0.5 | 1 Se Fernbridge, CA | Half inch sized hail estimated on Highway 101 at the Palmer Creek Road junction. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Oakland, CA (KOAK), launched 12:00Z, 6.9 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
- 664 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- -41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
551 WWUS86 KEKA 181855 RFWEKA Urgent - Fire Weather Message National Weather Service Eureka CA 1155 AM PDT Thu Jun 18 2026 CAZ403-406-409-410-191200- /O.UPG.KEKA.FW.A.0001.260619T1200Z-260620T0400Z/ /O.NEW.KEKA.FW.W.0002.260619T1500Z-260620T0200Z/ 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- 1155 AM PDT Thu Jun 18 2026 ...RED FLAG WARNING IN EFFECT FROM 8 AM TO 7 PM PDT FRIDAY... The National Weather Service in Eureka has issued a Red Flag Warning, which is in effect from 8 AM to 7 PM PDT Friday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Northern Trinity and Humboldt Counties including fire weather zones 403, 406, 409, and 410. * THUNDERSTORMS...Isolated, mostly dry thunderstorms may form over the higher terrain of northern Humboldt and Trinity counties as early as 4 AM Friday morning and then through Friday afternoon. Overall thunderstorm confidence remains very uncertain. * OUTFLOW WINDS...Storms could produce gusty and erratic outflow winds up to 40 mph. * IMPACTS...Thunderstorms may ignite new fires with dry fuels and in difficult to access locations. 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. && $$ http://weather.gov/eureka
3 follow-up statements
673 WWUS86 KEKA 191419 RFWEKA Urgent - Fire Weather Message National Weather Service Eureka CA 719 AM PDT Fri Jun 19 2026 CAZ403-406-409-410-192230- /O.CON.KEKA.FW.W.0002.260619T1500Z-260620T0200Z/ Northeastern Interior Humboldt and Southwestern Siskiyou Including Orleans- Eastern Interior Humboldt Including Willow Creek and Hoopa- Northwestern Trinity Including Salyer and Big Bar- Northeastern Trinity Including Trinity Lake- 719 AM PDT Fri Jun 19 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM PDT THIS EVENING... * AFFECTED AREA...Northern Trinity and Humboldt Counties including fire weather zones 403, 406, 409, and 410. * THUNDERSTORMS...Isolated, mostly dry thunderstorms may form over the higher terrain of northern Humboldt and Trinity counties as early as 4 AM Friday morning and then through Friday afternoon. Overall thunderstorm confidence remains very uncertain. * OUTFLOW WINDS...Storms could produce gusty and erratic outflow winds up to 40 mph. * IMPACTS...Thunderstorms may ignite new fires with dry fuels and in difficult to access locations. Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/eureka
436 WWUS86 KEKA 191530 RFWEKA Urgent - Fire Weather Message National Weather Service Eureka CA 830 AM PDT Fri Jun 19 2026 CAZ411-192330- /O.EXA.KEKA.FW.W.0002.000000T0000Z-260620T0200Z/ Eastern Trinity Including Weaverville and Hayfork- 830 AM PDT Fri Jun 19 2026 ...RED FLAG WARNING IN EFFECT UNTIL 7 PM PDT THIS EVENING... The National Weather Service in Eureka has issued a Red Flag Warning, which is in effect until 7 PM PDT this evening. * AFFECTED AREA...Northern Trinity and Humboldt Counties including fire weather zones 403, 406, 409, 410, and 411. * THUNDERSTORMS...Isolated, mostly dry thunderstorms may form over the higher terrain of northern Humboldt and Trinity counties through this afternoon. * OUTFLOW WINDS...Storms could produce gusty and erratic outflow winds up to 40 mph. * IMPACTS...Thunderstorms may ignite new fires with dry fuels and in difficult to access locations. 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. && $$ CAZ403-406-409-410-192330- /O.CON.KEKA.FW.W.0002.000000T0000Z-260620T0200Z/ Northeastern Interior Humboldt and Southwestern Siskiyou Including Orleans- Eastern Interior Humboldt Including Willow Creek and Hoopa- Northwestern Trinity Including Salyer and Big Bar- Northeastern Trinity Including Trinity Lake- 830 AM PDT Fri Jun 19 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM PDT THIS EVENING... * AFFECTED AREA...Northern Trinity and Humboldt Counties including fire weather zones 403, 406, 409, 410, and 411. * THUNDERSTORMS...Isolated, mostly dry thunderstorms may form over the higher terrain of northern Humboldt and Trinity counties through this afternoon. * OUTFLOW WINDS...Storms could produce gusty and erratic outflow winds up to 40 mph. * IMPACTS...Thunderstorms may ignite new fires with dry fuels and in difficult to access locations. Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/eureka
356 WWUS86 KEKA 192137 RFWEKA Urgent - Fire Weather Message National Weather Service Eureka CA 237 PM PDT Fri Jun 19 2026 CAZ403-406-409>411-200200- /O.CON.KEKA.FW.W.0002.000000T0000Z-260620T0200Z/ 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- 237 PM PDT Fri Jun 19 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM PDT THIS EVENING... * AFFECTED AREA...Northern Trinity and Humboldt Counties including fire weather zones 403, 406, 409, 410, and 411. * THUNDERSTORMS...Isolated, mostly dry thunderstorms may form over the higher terrain of northern Humboldt and Trinity counties through this afternoon. * OUTFLOW WINDS...Storms could produce gusty and erratic outflow winds up to 40 mph. * IMPACTS...Thunderstorms may ignite new fires with dry fuels and in difficult to access locations. 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
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.