Alert archive / California / Red Flag Warnings in 2021
Red Flag Warning 2, NWS Hanford, CA
NWS Hanford, CA issued this red flag warning at Jul 17, 2021, 11:01 AM PDT for 8 counties in California. It took effect at Jul 18, 2021, 11:00 AM PDT. It was in force for 16 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 17, 2021, 11:01 AM PDT (18:01 UTC)
- In effect from
- Jul 18, 2021, 11:00 AM PDT
- Expired
- Jul 19, 2021, 2:39 AM PDT
- In force
- 16 hr
- Issued by
- NWS Hanford, CA
Counties Fresno County, CA, Kern County, CA, Kings County, CA, Madera County, CA, Mariposa County, CA, Merced County, CA, Tulare County, CA, Tuolumne County, CA
The radar
The San Joaquin Valley radar (KHNX), 54 km from the middle of the area, began a volume at 18:04 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, 6.0 hours before the alert went out and 242 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
- 2243 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 64 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
887 WWUS86 KHNX 171801 RFWHNX URGENT - FIRE WEATHER MESSAGE National Weather Service Hanford CA 1101 AM PDT Sat Jul 17 2021 .A northerly surge of monsoonal moisture Sunday through Monday will provide a favorable environment for thunderstorm development in the foothills and mountains along with a high fire danger. CAZ580-171915- /O.CAN.KHNX.FW.A.0002.210718T1800Z-210720T0000Z/ San Joaquin Valley- 1101 AM PDT Sat Jul 17 2021 ...FIRE WEATHER WATCH IS CANCELLED FOR DRY THUNDERSTORMS FOR FIRE WEATHER ZONES 579, 580, 590, 591, 592, 593, 594, 595, 596, AND 597... The National Weather Service in Hanford has cancelled the Fire Weather Watch for the San Joaquin Valley. Isolated showers may be accompanied by thunder and lightning Sunday through midday Monday. $$ CAZ579-590>597-180215- /O.UPG.KHNX.FW.A.0002.210718T1800Z-210720T0000Z/ /O.NEW.KHNX.FW.W.0002.210718T1800Z-210720T0000Z/ West Side Hills-Central Sierra Foothills- Southern Sierra Foothills-Central Sierra-North Kings River- Sequoia Kings-Lake Isabella-Tehachapi Area-Fort Tejon- 1101 AM PDT Sat Jul 17 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM SUNDAY TO 5 PM PDT MONDAY FOR THUNDERSTORMS WITH DRY LIGHTNING... The National Weather Service in Hanford has issued a Red Flag Warning, which is in effect from 11 AM Sunday to 5 PM PDT Monday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...West Side Hills, the foothills and higher elevations of the Sierra and the Kern County mountains. * WIND...Gusty and erratic winds are possible in the vicinity of thunderstorms with gusts to around 40 mph. * THUNDERSTORMS...Scattered thunderstorms with little or no rainfall accompanied by cloud to ground lightning. * IMPACTS...The combination of parched fuels and dry lightning could easily ignite new fires within the warning area. Additionally, gusty and erratic winds that accompany some thunderstorms could cause rapid spread of new and existing fires. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of extremely dry fuels, gusty erratic winds and lightning associated with thunderstorms can result in extreme fire behavior. && $$ Durfee
5 follow-up statements
647 WWUS86 KHNX 180204 RFWHNX URGENT - FIRE WEATHER MESSAGE National Weather Service Hanford CA 704 PM PDT Sat Jul 17 2021 .A northerly surge of monsoonal moisture Sunday through Monday will provide a favorable environment for thunderstorm development in the foothills and mountains along with a high fire danger. CAZ579-590>597-181100- /O.CON.KHNX.FW.W.0002.210718T1800Z-210720T0000Z/ West Side Hills-Central Sierra Foothills- Southern Sierra Foothills-Central Sierra-North Kings River- Sequoia Kings-Lake Isabella-Tehachapi Area-Fort Tejon- 704 PM PDT Sat Jul 17 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM SUNDAY TO 5 PM PDT MONDAY FOR THUNDERSTORMS WITH DRY LIGHTNING... * AFFECTED AREA...West Side Hills, the Sierra Nevada and foothills, and the Kern County mountains. * WIND...Gusty and erratic winds are possible in the vicinity of thunderstorms with gusts to around 40 mph. * THUNDERSTORMS...Scattered thunderstorms with little or no rainfall accompanied by cloud to ground lightning. * IMPACTS...The combination of parched fuels and dry lightning could easily ignite new fires within the warning area. Additionally, gusty and erratic winds that accompany some thunderstorms could cause rapid spread of new and existing fires. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of extremely dry fuels, gusty erratic winds and lightning associated with thunderstorms can result in extreme fire behavior. && $$ Bean
238 WWUS86 KHNX 181036 RFWHNX URGENT - FIRE WEATHER MESSAGE National Weather Service Hanford CA 336 AM PDT Sun Jul 18 2021 .A northerly surge of monsoonal moisture Sunday through Monday will provide a favorable environment for thunderstorm development in the foothills and mountains along with a high fire danger. CAZ579-590>597-181900- /O.CON.KHNX.FW.W.0002.210718T1800Z-210720T0000Z/ West Side Hills-Central Sierra Foothills- Southern Sierra Foothills-Central Sierra-North Kings River- Sequoia Kings-Lake Isabella-Tehachapi Area-Fort Tejon- 336 AM PDT Sun Jul 18 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 5 PM PDT MONDAY FOR THUNDERSTORMS WITH DRY LIGHTNING... * AFFECTED AREA...West Side Hills, the Sierra Nevada and foothills, and the Kern County mountains. * WIND...Gusty and erratic winds are possible in the vicinity of thunderstorms with gusts to around 40 mph. * THUNDERSTORMS...Scattered thunderstorms with little or no rainfall accompanied by cloud to ground lightning. * IMPACTS...The combination of parched fuels and dry lightning could easily ignite new fires within the warning area. Additionally, gusty and erratic winds that accompany some thunderstorms could cause rapid spread of new and existing fires. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of extremely dry fuels, gusty erratic winds and lightning associated with thunderstorms can result in extreme fire behavior. && $$
873 WWUS86 KHNX 181749 RFWHNX URGENT - FIRE WEATHER MESSAGE National Weather Service Hanford CA 1049 AM PDT Sun Jul 18 2021 .A northerly surge of monsoonal moisture through Monday afternoon will provide a favorable environment for thunderstorm development in the foothills and mountains along with a high fire danger. CAZ579-590>597-190200- /O.CON.KHNX.FW.W.0002.210718T1800Z-210720T0000Z/ West Side Hills-Central Sierra Foothills- Southern Sierra Foothills-Central Sierra-North Kings River- Sequoia Kings-Lake Isabella-Tehachapi Area-Fort Tejon- 1049 AM PDT Sun Jul 18 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT MONDAY FOR THUNDERSTORMS WITH DRY LIGHTNING FOR FIRE WEATHER ZONES 579, 590, 591, 592, 593, 594, 595, 596, AND 597... * AFFECTED AREA...West Side Hills, the Sierra Nevada and foothills, and the Kern County mountains. * WIND...Gusty and erratic winds are possible in the vicinity of thunderstorms with gusts to around 40 mph. * THUNDERSTORMS...Scattered thunderstorms with little or no rainfall accompanied by cloud to ground lightning. * IMPACTS...The combination of parched fuels and dry lightning could easily ignite new fires within the warning area. Additionally, gusty and erratic winds that accompany some thunderstorms could cause rapid spread of new and existing fires. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of extremely dry fuels, gusty erratic winds and lightning associated with thunderstorms can result in extreme fire behavior. && $$ DS
306 WWUS86 KHNX 190137 RFWHNX URGENT - FIRE WEATHER MESSAGE National Weather Service Hanford CA 637 PM PDT Sun Jul 18 2021 .A northerly surge of monsoonal moisture through Monday afternoon will provide a favorable environment for thunderstorm development in the foothills and mountains along with a high fire danger. CAZ579-590>597-191000- /O.CON.KHNX.FW.W.0002.000000T0000Z-210720T0000Z/ West Side Hills-Central Sierra Foothills- Southern Sierra Foothills-Central Sierra-North Kings River- Sequoia Kings-Lake Isabella-Tehachapi Area-Fort Tejon- 637 PM PDT Sun Jul 18 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT MONDAY FOR THUNDERSTORMS WITH DRY LIGHTNING FOR FIRE WEATHER ZONES 579, 590, 591, 592, 593, 594, 595, 596, AND 597... * AFFECTED AREA...West Side Hills, the Sierra Nevada and foothills, and the Kern County mountains. * WIND...Gusty and erratic winds are possible in the vicinity of thunderstorms with gusts to around 40 mph. * THUNDERSTORMS...Scattered thunderstorms with little or no rainfall accompanied by cloud to ground lightning. * IMPACTS...The combination of parched fuels and dry lightning could easily ignite new fires within the warning area. Additionally, gusty and erratic winds that accompany some thunderstorms could cause rapid spread of new and existing fires. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of extremely dry fuels, gusty erratic winds and lightning associated with thunderstorms can result in extreme fire behavior. && $$ Bean
670 WWUS86 KHNX 190939 RFWHNX URGENT - FIRE WEATHER MESSAGE National Weather Service Hanford CA 239 AM PDT Mon Jul 19 2021 CAZ579-590>597-191045- /O.CAN.KHNX.FW.W.0002.000000T0000Z-210720T0000Z/ West Side Hills-Central Sierra Foothills- Southern Sierra Foothills-Central Sierra-North Kings River- Sequoia Kings-Lake Isabella-Tehachapi Area-Fort Tejon- 239 AM PDT Mon Jul 19 2021 ...RED FLAG WARNING IS CANCELLED FOR THUNDERSTORMS WITH DRY LIGHTNING FOR FIRE WEATHER ZONES 579, 590, 591, 592, 593, 594, 595, 596, AND 597... The National Weather Service in Hanford has cancelled the Red Flag Warning. Wetting rains will be associated with thunderstorms in the Sierra Nevada, adjacent foothills, and Kern County mountains today. $$ BS
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.