Alert archive / Arizona / Red Flag Warnings in 2021
Red Flag Warning 10, NWS Tucson, AZ
NWS Tucson, AZ issued this red flag warning at Apr 7, 2021, 2:19 PM MST for 6 counties in Arizona. It took effect at Apr 8, 2021, 1:00 PM MST. It was in force for 7 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
- Apr 7, 2021, 2:19 PM MST (21:19 UTC)
- In effect from
- Apr 8, 2021, 1:00 PM MST
- Expired
- Apr 8, 2021, 8:00 PM MST
- In force
- 7 hr
- Issued by
- NWS Tucson, AZ
Counties Cochise County, AZ, Graham County, AZ, Greenlee County, AZ, Pima County, AZ, Pinal County, AZ, Santa Cruz County, AZ
The radar
The Tucson radar (KEMX), 61 km from the middle of the area, began a volume at 21:22 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
Tuscon, AZ (KTUS), launched 12:00Z, 9.3 hours before the alert went out and 49 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
- 4759 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
198 WWUS85 KTWC 072119 RFWTWC URGENT - FIRE WEATHER MESSAGE National Weather Service Tucson AZ 219 PM MST Wed Apr 7 2021 AZZ151-152-154-081200- /O.NEW.KTWC.FW.W.0010.210408T2000Z-210409T0300Z/ Arizona Fire Weather Zone 151 Western half Desert Grasslands FDRA including elevations up to 5500 feet in Southeast corner of Pinal County- Extreme Eastern Pima County-Western third of Cochise County- Santa Cruz County-TDC-Arizona Fire Weather Zone 152 Eastern half Desert Grasslands FDRA including elevations up to 5500 feet in Southwest Graham County and Eastern two thirds of Cochise County-Southern San Carlos Reservation- Southern Greenlee County below 5000 feet-TDC- Arizona Fire Weather Zone 154 Forest Woodlands FDRA including the Sky Islands of Southeast Arizona above 5500 feet-Coronado NF-TDC- 219 PM MST Wed Apr 7 2021 ...RED FLAG WARNING IN EFFECT FROM 1 PM TO 8 PM MST THURSDAY FOR STRONG WINDS, LOW RELATIVE HUMIDITY AND A HIGH FIRE DANGER RATING FOR SOUTHEAST ARIZONA INCLUDING PORTIONS OF FIRE WEATHER ZONES 151, 152, AND 154... The National Weather Service in Tucson has issued a Red Flag Warning, which is in effect from 1 PM to 8 PM MST Thursday. * AFFECTED AREA...The eastern half of fire weather zone 151, the majority of fire weather zone 152, and the eastern mountain ranges of fire weather zone 154. * TIMING...1 PM MST Thursday afternoon through 8 PM MST Thursday evening. * WINDS...West to northwest winds at 15 to 25 mph with gusts to 35 mph in the warning area. The strongest winds will be near the Arizona/New Mexico border. * RELATIVE HUMIDITY...Minimum relative humidity 5 to 10 percent at lower elevations, and between 10 and 15 percent in the mountains. * IMPACTS...Any fires that develop or are ongoing will have the potential to spread rapidly. * FOR A DETAILED VIEW OF THE HAZARD AREA...Visit weather.gov/Tucson and click on the Detailed Hazards Icon. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are expected to develop. A combination of strong winds...low relative humidity...and dry vegetation will create the potential for rapid and erratic fire growth. Please advise the appropriate officials or fire crews in the field of the Red Flag Warning for portions of Southeast Arizona. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
3 follow-up statements
951 WWUS85 KTWC 080909 RFWTWC URGENT - FIRE WEATHER MESSAGE National Weather Service Tucson AZ 209 AM MST Thu Apr 8 2021 AZZ151-152-154-082300- /O.CON.KTWC.FW.W.0010.210408T2000Z-210409T0300Z/ Arizona Fire Weather Zone 151 Western half Desert Grasslands FDRA including elevations up to 5500 feet in Southeast corner of Pinal County- Extreme Eastern Pima County-Western third of Cochise County- Santa Cruz County-TDC-Arizona Fire Weather Zone 152 Eastern half Desert Grasslands FDRA including elevations up to 5500 feet in Southwest Graham County and Eastern two thirds of Cochise County-Southern San Carlos Reservation- Southern Greenlee County below 5000 feet-TDC- Arizona Fire Weather Zone 154 Forest Woodlands FDRA including the Sky Islands of Southeast Arizona above 5500 feet-Coronado NF-TDC- 209 AM MST Thu Apr 8 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO 8 PM MST THIS EVENING FOR STRONG WINDS, LOW RELATIVE HUMIDITY, AND A HIGH FIRE DANGER RATING FOR SOUTHEAST ARIZONA INCLUDING PORTIONS OF FIRE WEATHER ZONES 151, 152, AND 154... * AFFECTED AREA...The eastern half of fire weather zone 151, the majority of fire weather zone 152, and the eastern mountain ranges of fire weather zone 154. * TIMING...1 PM MST this afternoon through 8 PM MST this evening. * WINDS...West to northwest winds at 15 to 25 mph with gusts to 35 mph in the warning area. The strongest winds will be near the Arizona/New Mexico border. * RELATIVE HUMIDITY...Minimum relative humidity 5 to 10 percent at lower elevations, and between 10 and 15 percent in the mountains. * IMPACTS...Any fires that develop or are ongoing will have the potential to spread rapidly. * FOR A DETAILED VIEW OF THE HAZARD AREA...Visit weather.gov/Tucson and click on the Detailed Hazards Icon. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are expected to develop. A combination of strong winds...low relative humidity...and dry vegetation will create the potential for rapid and erratic fire growth. Please advise the appropriate officials or fire crews in the field of the Red Flag Warning for portions of Southeast Arizona. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
920 WWUS85 KTWC 082005 RFWTWC URGENT - FIRE WEATHER MESSAGE National Weather Service Tucson AZ 105 PM MST Thu Apr 8 2021 AZZ151-152-154-090300- /O.CON.KTWC.FW.W.0010.000000T0000Z-210409T0300Z/ Arizona Fire Weather Zone 151 Western half Desert Grasslands FDRA including elevations up to 5500 feet in Southeast corner of Pinal County- Extreme Eastern Pima County-Western third of Cochise County- Santa Cruz County-TDC-Arizona Fire Weather Zone 152 Eastern half Desert Grasslands FDRA including elevations up to 5500 feet in Southwest Graham County and Eastern two thirds of Cochise County-Southern San Carlos Reservation- Southern Greenlee County below 5000 feet-TDC- Arizona Fire Weather Zone 154 Forest Woodlands FDRA including the Sky Islands of Southeast Arizona above 5500 feet-Coronado NF-TDC- 105 PM MST Thu Apr 8 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS EVENING FOR STRONG WINDS, LOW RELATIVE HUMIDITY, AND A HIGH FIRE DANGER RATING FOR SOUTHEAST ARIZONA INCLUDING PORTIONS OF FIRE WEATHER ZONES 151, 152, AND 154... * AFFECTED AREA...The eastern half of fire weather zone 151, the majority of fire weather zone 152, and the eastern mountain ranges of fire weather zone 154. * TIMING...Through 8 PM MST this evening. * WINDS...West to northwest winds at 15 to 25 mph with gusts to 35 mph in the warning area. The strongest winds will be near the Arizona/New Mexico border. * RELATIVE HUMIDITY...Minimum relative humidity 5 to 10 percent at lower elevations, and between 10 and 15 percent in the mountains. * IMPACTS...Any fires that develop or are ongoing will have the potential to spread rapidly. * FOR A DETAILED VIEW OF THE HAZARD AREA...Visit weather.gov/Tucson and click on the Detailed Hazards Icon. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are expected to develop. A combination of strong winds...low relative humidity...and dry vegetation will create the potential for rapid and erratic fire growth. Please advise the appropriate officials or fire crews in the field of the Red Flag Warning for portions of Southeast Arizona. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
837 WWUS85 KTWC 090251 RFWTWC URGENT - FIRE WEATHER MESSAGE National Weather Service Tucson AZ 751 PM MST Thu Apr 8 2021 AZZ151-152-154-090400- /O.EXP.KTWC.FW.W.0010.000000T0000Z-210409T0300Z/ Arizona Fire Weather Zone 151 Western half Desert Grasslands FDRA including elevations up to 5500 feet in Southeast corner of Pinal County- Extreme Eastern Pima County-Western third of Cochise County- Santa Cruz County-TDC-Arizona Fire Weather Zone 152 Eastern half Desert Grasslands FDRA including elevations up to 5500 feet in Southwest Graham County and Eastern two thirds of Cochise County-Southern San Carlos Reservation- Southern Greenlee County below 5000 feet-TDC- Arizona Fire Weather Zone 154 Forest Woodlands FDRA including the Sky Islands of Southeast Arizona above 5500 feet-Coronado NF-TDC- 751 PM MST Thu Apr 8 2021 ...RED FLAG WARNING WILL EXPIRE AT 8 PM MST THIS EVENING FOR SOUTHEAST ARIZONA INCLUDING PORTIONS OF FIRE WEATHER ZONES 151, 152, AND 154... Winds have continued to slowly diminish through the evening hours, and have fallen below the Red Flag Warning threshold. Therefore, the Red Flag Warning has been allowed to expire at 8 PM MST. However, localized critical fire weather conditions may still be present for the next hour or two as winds taper off and relative humidity increases. $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
Nearby
Red Flag Warnings in Arizona, 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.