Alert archive / Arizona / Red Flag Warnings in 2021
Red Flag Warning 6, NWS Tucson, AZ
NWS Tucson, AZ issued this red flag warning at Mar 22, 2021, 1:50 PM MST for 6 counties in Arizona. It took effect at Mar 23, 2021, 12:00 PM MST. It was in force for 6 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
- Mar 22, 2021, 1:50 PM MST (20:50 UTC)
- In effect from
- Mar 23, 2021, 12:00 PM MST
- Expired
- Mar 23, 2021, 6:00 PM MST
- In force
- 6 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 20:48 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 |
|---|---|---|---|
| Mar 23, 5:27 PM MST | HAIL 0.25 | 7 E Tucson, AZ | BRIEF SMALL PEA SIZED HAIL WITH PASSING SHOWER. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 8.8 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
- 2966 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 125 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
494 WWUS85 KTWC 222050 RFWTWC URGENT - FIRE WEATHER MESSAGE National Weather Service Tucson AZ 150 PM MST Mon Mar 22 2021 AZZ151-152-154-230100- /O.UPG.KTWC.FW.A.0004.210323T1900Z-210324T0200Z/ /O.NEW.KTWC.FW.W.0006.210323T1900Z-210324T0100Z/ /O.CON.KTWC.FW.W.0005.000000T0000Z-210323T0100Z/ 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- 150 PM MST Mon Mar 22 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM MST THIS EVENING FOR STRONG WINDS, LOW HUMIDITY, AND A HIGH FIRE DANGER RATING FOR SOUTHERN PARTS OF FIRE WEATHER ZONES 151, 152, AND 154... ...RED FLAG WARNING IN EFFECT FROM NOON TO 6 PM MST TUESDAY FOR STRONG WINDS, LOW HUMIDITY, AND A HIGH FIRE DANGER RATING FOR PARTS OF FIRE WEATHER ZONES 151, 152, AND 154... The National Weather Service in Tucson has upgraded the Fire Weather Watch to a Red Flag Warning for Tuesday from noon until 6 PM MST that evening. Otherwise, the current Red Flag Warning remains in effect until 6 PM MST this evening. * AFFECTED AREA...Portions of Fire weather zones 151...152...and 154. * TIMING...Through 6 PM MST this evening and again from noon until 6 PM MST on Tuesday. * WINDS...Westerly 20-foot winds 20 to 30 mph with gusts to 45 mph. * RELATIVE HUMIDITY...Minimum RH 10 to 15 percent * IMPACTS...Any fires that develop or are ongoing will have the potential to spread rapidly and be difficult to control. * 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
4 follow-up statements
830 WWUS85 KTWC 230105 RFWTWC URGENT - FIRE WEATHER MESSAGE National Weather Service Tucson AZ 605 PM MST Mon Mar 22 2021 AZZ151-152-154-231100- /O.EXP.KTWC.FW.W.0005.000000T0000Z-210323T0100Z/ /O.CON.KTWC.FW.W.0006.210323T1900Z-210324T0100Z/ 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- 605 PM MST Mon Mar 22 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 6 PM MST TUESDAY FOR STRONG WINDS, LOW HUMIDITY, AND A HIGH FIRE DANGER RATING FOR SOUTHERN PARTS OF FIRE WEATHER ZONES 151, 152, AND 154... ...RED FLAG WARNING HAS EXPIRED FOR STRONG WINDS, LOW HUMIDITY, AND A HIGH FIRE DANGER RATING FOR SOUTHERN PARTS OF FIRE WEATHER ZONES 151, 152, AND 154... The National Weather Service in Tucson has upgraded the Fire Weather Watch to a Red Flag Warning for Tuesday from noon until 6 PM MST that evening. Otherwise, the Red Flag Warning that was in effect today expired at 6 PM MST this evening. * AFFECTED AREA...Portions of Fire weather zones 151...152... and 154. * TIMING...Noon until 6 PM MST on Tuesday. * WINDS...Westerly 20-foot winds 20 to 30 mph with gusts to 45 mph. Localized gust to 55 mph are possible. * RELATIVE HUMIDITY...Minimum RH 10 to 15 percent * IMPACTS...Any fires that develop or are ongoing will have the potential to spread rapidly and be difficult to control. * 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
289 WWUS85 KTWC 231525 RFWTWC URGENT - FIRE WEATHER MESSAGE National Weather Service Tucson AZ 825 AM MST Tue Mar 23 2021 AZZ151-152-154-240100- /O.CON.KTWC.FW.W.0006.210323T1900Z-210324T0100Z/ 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- 825 AM MST Tue Mar 23 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 6 PM MST TUESDAY FOR STRONG WINDS, LOW HUMIDITY, AND A HIGH FIRE DANGER RATING FOR SOUTHERN PARTS OF FIRE WEATHER ZONES 151, 152, AND 154... * AFFECTED AREA...Portions of fire weather zones 151...152...154. * TIMING...Noon until 6 PM MST on Today. * WINDS...Westerly 20-foot winds 20 to 30 mph with gusts to 45 mph. Localized gust to 55 mph are possible. * RELATIVE HUMIDITY...Minimum RH 10 to 15 percent * IMPACTS...Any fires that develop or are ongoing will have the potential to spread rapidly and be difficult to control. * 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. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
400 WWUS85 KTWC 232003 RFWTWC URGENT - FIRE WEATHER MESSAGE National Weather Service Tucson AZ 103 PM MST Tue Mar 23 2021 AZZ151-152-154-240100- /O.CON.KTWC.FW.W.0006.000000T0000Z-210324T0100Z/ Arizona Fire Weather Zone 151 Western half Desert Grasslands FDRA including elevations up to 5500 feet in Southeast corner of Pinal County- Extreme Eastern Pima County-Western third of Cochise County- Santa Cruz County-TDC-Arizona Fire Weather Zone 152 Eastern half Desert Grasslands FDRA including elevations up to 5500 feet in Southwest Graham County and Eastern two thirds of Cochise County-Southern San Carlos Reservation- Southern Greenlee County below 5000 feet-TDC- Arizona Fire Weather Zone 154 Forest Woodlands FDRA including the Sky Islands of Southeast Arizona above 5500 feet-Coronado NF-TDC- 103 PM MST Tue Mar 23 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM MST THIS EVENING FOR STRONG WINDS, LOW HUMIDITY, AND A HIGH FIRE DANGER RATING FOR SOUTHERN PARTS OF FIRE WEATHER ZONES 151, 152, AND 154... * AFFECTED AREA...Fire weather zones 151...152...154. * TIMING...Noon until 6 PM MST on Today. * WINDS...Westerly 20-foot winds 20 to 30 mph with gusts to 45 mph. Localized gust to 55 mph are possible. * RELATIVE HUMIDITY...Minimum RH 10 to 15 percent * IMPACTS...Any fires that develop or are ongoing will have the potential to spread rapidly and be difficult to control. * FOR A DETAILED VIEW OF THE HAZARD AREA...Visit weather.gov/Tucson and click on the Detailed Hazards Icon. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are expected to develop. A combination of strong winds...low relative humidity...and dry vegetation will create the potential for rapid and erratic fire growth. Please advise the appropriate officials or fire crews in the field of the Red Flag Warning for portions of Southeast Arizona. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
523 WWUS85 KTWC 240055 RFWTWC URGENT - FIRE WEATHER MESSAGE National Weather Service Tucson AZ 555 PM MST Tue Mar 23 2021 AZZ151-152-154-240200- /O.EXP.KTWC.FW.W.0006.000000T0000Z-210324T0100Z/ 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- 555 PM MST Tue Mar 23 2021 ...RED FLAG WARNING WILL EXPIRE AT 6 PM MST THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 151, 152, AND 154... Moisture is increasing and winds are weakening gradually this evening, therefore the Red Flag Warning will be allowed to expire. Breezy winds will persist into the evening. $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 22, 2:27 AM MST | Red Flag Warning | TWC | Cochise, Graham, Greenlee, Pima, Pinal, Santa Cruz | 16 hr |
| Mar 22, 1:52 PM MST | Wind Advisory | TWC | Cochise, Graham, Greenlee, Pima, Pinal, Santa Cruz | 28 hr |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.