Alert archive / Arizona / Red Flag Warnings in 2021
Red Flag Warning 11, NWS Tucson, AZ
NWS Tucson, AZ issued this red flag warning at Apr 14, 2021, 2:20 PM MST for 6 counties in Arizona. It took effect at Apr 15, 2021, 12:00 PM MST. It was in force for 8 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 14, 2021, 2:20 PM MST (21:20 UTC)
- In effect from
- Apr 15, 2021, 12:00 PM MST
- Expired
- Apr 15, 2021, 8:00 PM MST
- In force
- 8 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 21:18 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
- 2737 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 209 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
072 WWUS85 KTWC 142120 RFWTWC URGENT - FIRE WEATHER MESSAGE National Weather Service Tucson AZ 220 PM MST Wed Apr 14 2021 AZZ151>154-151200- /O.UPG.KTWC.FW.A.0007.210415T1900Z-210416T0300Z/ /O.NEW.KTWC.FW.W.0011.210415T1900Z-210416T0300Z/ 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 153 Northern Graham County-Northern Greenlee County- White and Gila Mountains-Apache Sitgreaves NF- Southern San Carlos Reservation above 5000 feet-SDC- Arizona Fire Weather Zone 154 Forest Woodlands FDRA including the Sky Islands of Southeast Arizona above 5500 feet-Coronado NF-TDC- 220 PM MST Wed Apr 14 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TO 8 PM MST THURSDAY FOR STRONG WINDS, LOW HUMIDITY AND A HIGH FIRE DANGER RATING FOR SOUTHEAST ARIZONA FIRE WEATHER ZONES 152, 153, 154 AND EASTERN PORTIONS OF ZONE 151... The National Weather Service in Tucson has issued a Red Flag Warning, which is in effect from noon to 8 PM MST Thursday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Eastern portions of southeast Arizona including all of Cochise and Greenlee counties, all but far northwest Graham County, and from the Santa Rita and Rincon Mountains eastward in Santa Cruz and Pima Counties. * TIMING...Noon to 8 PM MST Thursday. * WINDS...West to southwest winds of 20 to 25 mph with gusts of 35 to 40 mph. The strongest winds will be in the mountains and near the New Mexico state line. * RELATIVE HUMIDITY...Minimum relative humidity 5 to 10 percent at lower elevations, and 10 to 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
2 follow-up statements
415 WWUS85 KTWC 150921 RFWTWC URGENT - FIRE WEATHER MESSAGE National Weather Service Tucson AZ 221 AM MST Thu Apr 15 2021 AZZ151>154-160300- /O.CON.KTWC.FW.W.0011.210415T1900Z-210416T0300Z/ 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 153 Northern Graham County-Northern Greenlee County- White and Gila Mountains-Apache Sitgreaves NF- Southern San Carlos Reservation above 5000 feet-SDC- Arizona Fire Weather Zone 154 Forest Woodlands FDRA including the Sky Islands of Southeast Arizona above 5500 feet-Coronado NF-TDC- 221 AM MST Thu Apr 15 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 8 PM MST THIS EVENING FOR STRONG WINDS, LOW HUMIDITY AND A VERY HIGH FIRE DANGER RATING FOR SOUTHEAST ARIZONA FIRE WEATHER ZONES 152, 153, 154 AND EASTERN PORTIONS OF ZONE 151... * AFFECTED AREA...Eastern portions of southeast Arizona including all of Cochise and Greenlee counties, all but far northwest Graham County, and from the Santa Rita and Rincon Mountains eastward in Santa Cruz and Pima Counties. * TIMING...Noon to 8 PM MST Today. * WINDS...Southwest to west winds of 20 to 25 mph with gusts of 35 to 40 mph. * RELATIVE HUMIDITY...Minimum relative humidity of 5 to 10 percent at the lower elevations and 10 to 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
714 WWUS85 KTWC 152038 RFWTWC URGENT - FIRE WEATHER MESSAGE National Weather Service Tucson AZ 138 PM MST Thu Apr 15 2021 AZZ151>154-160300- /O.CON.KTWC.FW.W.0011.000000T0000Z-210416T0300Z/ 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 153 Northern Graham County-Northern Greenlee County- White and Gila Mountains-Apache Sitgreaves NF- Southern San Carlos Reservation above 5000 feet-SDC- Arizona Fire Weather Zone 154 Forest Woodlands FDRA including the Sky Islands of Southeast Arizona above 5500 feet-Coronado NF-TDC- 138 PM MST Thu Apr 15 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS EVENING FOR STRONG WINDS, LOW HUMIDITY AND A VERY HIGH FIRE DANGER RATING FOR SOUTHEAST ARIZONA FIRE WEATHER ZONES 152, 153, 154 AND EASTERN PORTIONS OF ZONE 151... * AFFECTED AREA...Eastern portions of southeast Arizona including all of Cochise and Greenlee counties, all but far northwest Graham County, and from the Santa Rita and Rincon Mountains eastward in Santa Cruz and Pima Counties. * TIMING...Through 8 PM MST this evening. * WINDS...Southwest to west winds of 20 to 25 mph with gusts of 35 to 40 mph. * RELATIVE HUMIDITY...Minimum relative humidity of 5 to 10 percent at the lower elevations and 10 to 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
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.