Alert archive / California / Red Flag Warnings in 2021
Red Flag Warning 3, NWS Hanford, CA
NWS Hanford, CA issued this red flag warning at Sep 17, 2021, 4:47 PM PDT for Fresno County, Kern County, Tulare County, California. It took effect at Sep 18, 2021, 5:00 PM PDT. It was in force for 27 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 17, 2021, 4:47 PM PDT (23:47 UTC)
- In effect from
- Sep 18, 2021, 5:00 PM PDT
- Expired
- Sep 19, 2021, 8:00 PM PDT
- In force
- 27 hr
- Issued by
- NWS Hanford, CA
Counties Fresno County, CA, Kern County, CA, Tulare County, CA
The radar
The San Joaquin Valley radar (KHNX), 56 km from the middle of the area, began a volume at 23:51 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
Vandenberg AFB, CA (KVBG), launched 12:00Z, 11.8 hours before the alert went out and 201 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
- 0 m above ground
- 0-6 km bulk shear
- 1 kt
- 0-1 km storm-relative helicity
- -22 m²/s²
- 0-3 km storm-relative helicity
- -67 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
454 WWUS86 KHNX 172347 RFWHNX URGENT - FIRE WEATHER MESSAGE National Weather Service Hanford CA 447 PM PDT Fri Sep 17 2021 .A low pressure system will bring gusty winds along with low relative humidities to areas with already dry fuels Saturday through Sunday increasing fire weather risks. CAZ593>596-180800- /O.UPG.KHNX.FW.A.0003.210919T0000Z-210920T0300Z/ /O.NEW.KHNX.FW.W.0003.210919T0000Z-210920T0300Z/ North Kings River-Sequoia Kings-Lake Isabella-Tehachapi Area- 447 PM PDT Fri Sep 17 2021 ...RED FLAG WARNING IN EFFECT FROM 5 PM SATURDAY TO 8 PM PDT SUNDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 593, 594, 595, AND 596... The National Weather Service in Hanford has issued a Red Flag Warning, which is in effect from 5 PM Saturday to 8 PM PDT Sunday. The Fire Weather Watch is no longer in effect. Extremely dry fuels, increased winds and low relative humidity along with ongoing wildfires will combine to create conditions which rapid wildfire spread is likely on current wildfires or any new fire starts. * AFFECTED AREA...Sierra Nevada from San Joaquin River southward through Tehachapi area. * WIND...Northwest winds 25-35 mph with gusts up to 45 mph possible. * HUMIDITY...Relative humidity will range from upper single digits to upper teens along with poor overnight recoveries. * IMPACTS...The combination of parched fuels, gusty winds, and low humidities increases chances of rapid fire spread and dangerous fire behavior. 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. && $$ Dudley
6 follow-up statements
119 WWUS86 KHNX 181040 RFWHNX URGENT - FIRE WEATHER MESSAGE National Weather Service Hanford CA 340 AM PDT Sat Sep 18 2021 .A low pressure system will bring gusty winds along with low relative humidities to areas with already dry fuels Saturday through Sunday increasing fire weather risks. CAZ593>596-181900- /O.CON.KHNX.FW.W.0003.210919T0000Z-210920T0300Z/ North Kings River-Sequoia Kings-Lake Isabella-Tehachapi Area- 340 AM PDT Sat Sep 18 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 8 PM PDT SUNDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 593, 594, 595, AND 596... Extremely dry fuels, increased winds and low relative humidity along with ongoing wildfires will combine to create conditions which rapid wildfire spread is likely on current wildfires or any new fire starts. * AFFECTED AREA...Sierra Nevada from San Joaquin River southward through Tehachapi area. * WIND...Northwest winds 25-35 mph with gusts up to 45 mph possible. * HUMIDITY...Relative humidity will range from upper single digits to upper teens along with poor overnight recoveries. * IMPACTS...The combination of parched fuels, gusty winds, and low humidities increases chances of rapid fire spread and dangerous fire behavior. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$
914 WWUS86 KHNX 181838 RFWHNX URGENT - FIRE WEATHER MESSAGE National Weather Service Hanford CA 1138 AM PDT Sat Sep 18 2021 .A low pressure system will bring gusty winds along with low relative humidities to areas with already dry fuels Saturday through Sunday increasing fire weather risks. CAZ593>596-190245- /O.CON.KHNX.FW.W.0003.210919T0000Z-210920T0300Z/ North Kings River-Sequoia Kings-Lake Isabella-Tehachapi Area- 1138 AM PDT Sat Sep 18 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 8 PM PDT SUNDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 593, 594, 595, AND 596... * AFFECTED AREA...Sierra Nevada from San Joaquin River southward through Tehachapi area. * WIND...Northwest winds 25-35 mph with gusts up to 45 mph possible. * HUMIDITY...Relative humidity will range from upper single digits to upper teens along with poor overnight recoveries. * IMPACTS...The combination of parched fuels, gusty winds, and low humidities increases chances of rapid fire spread and dangerous fire behavior. 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. && $$
994 WWUS86 KHNX 190221 RFWHNX URGENT - FIRE WEATHER MESSAGE National Weather Service Hanford CA 721 PM PDT Sat Sep 18 2021 .A low pressure system will bring gusty winds along with low relative humidities to areas with already dry fuels Saturday through Sunday increasing fire weather risks. CAZ593>596-191100- /O.CON.KHNX.FW.W.0003.000000T0000Z-210920T0300Z/ North Kings River-Sequoia Kings-Lake Isabella-Tehachapi Area- 721 PM PDT Sat Sep 18 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT SUNDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 593, 594, 595, AND 596... * AFFECTED AREA...Sierra Nevada from San Joaquin River southward through Tehachapi area. * WIND...Northwest winds 25-35 mph with gusts up to 45 mph possible. * HUMIDITY...Relative humidity will range from upper single digits to upper teens along with poor overnight recoveries. * IMPACTS...The combination of parched fuels, gusty winds, and low humidities increases chances of rapid fire spread and dangerous fire behavior. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$
034 WWUS86 KHNX 191045 RFWHNX URGENT - FIRE WEATHER MESSAGE National Weather Service Hanford CA 345 AM PDT Sun Sep 19 2021 .A low pressure system will bring gusty winds along with low relative humidities to areas with already dry fuels Saturday through Sunday increasing fire weather risks. CAZ593>596-191900- /O.CON.KHNX.FW.W.0003.000000T0000Z-210920T0300Z/ North Kings River-Sequoia Kings-Lake Isabella-Tehachapi Area- 345 AM PDT Sun Sep 19 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 593, 594, 595, AND 596... * AFFECTED AREA...Sierra Nevada from San Joaquin River southward through Tehachapi area. * WIND...Northwest winds 25-35 mph with gusts up to 45 mph possible. * HUMIDITY...Relative humidity will range from upper single digits to upper teens along with poor overnight recoveries. * IMPACTS...The combination of parched fuels, gusty winds, and low humidities increases chances of rapid fire spread and dangerous fire behavior. 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. && $$ Molina
753 WWUS86 KHNX 191834 RFWHNX URGENT - FIRE WEATHER MESSAGE National Weather Service Hanford CA 1134 AM PDT Sun Sep 19 2021 .A low pressure system will bring gusty winds along with low relative humidities to areas with already dry fuels this afternoon and this evening, increasing fire weather risks. CAZ593>596-200300- /O.CON.KHNX.FW.W.0003.000000T0000Z-210920T0300Z/ North Kings River-Sequoia Kings-Lake Isabella-Tehachapi Area- 1134 AM PDT Sun Sep 19 2021 ...A RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 593, 594, 595, AND 596... * AFFECTED AREA...Sierra Nevada from San Joaquin River southward through Tehachapi area. * WIND...Sustained northwest winds 25 to 35 mph, with gusts near 45 mph possible. * HUMIDITY...Minimum relative humidity values will range from the single digits to the mid teens. * IMPACTS...The combination of parched fuels, gusty winds, and low humidities increases chances of rapid fire spread and dangerous fire behavior. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ BS
902 WWUS86 KHNX 200252 RFWHNX URGENT - FIRE WEATHER MESSAGE National Weather Service Hanford CA 752 PM PDT Sun Sep 19 2021 CAZ593>596-200400- /O.EXP.KHNX.FW.W.0003.000000T0000Z-210920T0300Z/ North Kings River-Sequoia Kings-Lake Isabella-Tehachapi Area- 752 PM PDT Sun Sep 19 2021 ...RED FLAG WARNING WILL EXPIRE AT 8 PM PDT THIS EVENING FOR LOW RELATIVE HUMIDITY AND GUSTY WINDS FOR FIRE WEATHER ZONES 593, 594, 595, AND 596... The Red Flag Warning will be allowed to expire at 8 PM PDT this evening, as humidity has risen and winds have decreased. Gusts of around 35 mph are possible in a few locales near Lake Isabella and the Tehachapi Mountains through the next couple of hours. $$
The office that day
Everything else NWS Hanford, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 17, 9:27 AM PDT | Fire Weather Watch | HNX | Fresno, Kern, Tulare | 7 hr |
Nearby
Red Flag Warnings in California, 2021Every red flag warning in 2021
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.