Alert archive / Arizona / Red Flag Warnings in 2021
Red Flag Warning 5, NWS Tucson, AZ
NWS Tucson, AZ issued this red flag warning at Mar 22, 2021, 2:27 AM MST for 6 counties in Arizona. It took effect at Mar 22, 2021, 10:00 AM 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
- Mar 22, 2021, 2:27 AM MST (09:27 UTC)
- In effect from
- Mar 22, 2021, 10:00 AM MST
- Expired
- Mar 22, 2021, 6:00 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 09:26 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 00:00Z, 9.5 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
- 4143 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- -8 m²/s²
- 0-3 km storm-relative helicity
- 97 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
876 WWUS85 KTWC 220927 RFWTWC URGENT - FIRE WEATHER MESSAGE National Weather Service Tucson AZ 227 AM MST Mon Mar 22 2021 ...POTENTIAL FOR STRONG WINDS TODAY AND TUESDAY... .There is potential for strong and gusty winds to develop later this morning on the backside of a departing storm system. This potential exists east of I-19 and roughly south of I-10 and given the very dry air mass in place, critical fire weather conditions will occur if the wind fully materializes. Therefore a Red Flag Warning has been issued for today for that potential. Strong winds are again expected Tuesday as another strong weather system approaches the region. At this time winds are expected to reach critical levels across the area, however an increase in moisture and the potential for showers later in the day may limit the extent of critical conditions. Due to the uncertainty at this time the Tuesday Fire Weather Watch remains unchanged. AZZ151-152-154-221730- /O.NEW.KTWC.FW.W.0005.210322T1700Z-210323T0100Z/ /O.CON.KTWC.FW.A.0004.210323T1900Z-210324T0200Z/ 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- 227 AM MST Mon Mar 22 2021 ...RED FLAG WARNING IN EFFECT FROM 10 AM THIS MORNING TO 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... ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY EVENING FOR THE POTENTIAL OF STRONG WINDS, LOW HUMIDITY, AND A VERY HIGH FIRE DANGER RATING FOR SOUTHERN PARTS 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 10 AM this morning to 6 PM MST this evening. * AFFECTED AREA...For today's Red Flag Warning, fire weather zones 151, 152 and 154 along and south of I-10 and east of I-19. For Tuesday's watch, the southern parts of fire weather zones 151, 152 and 154. * TIMING...10 AM until 6 PM for today's Red Flag Warning. Fire Weather Watch Tuesday afternoon through Tuesday evening. * WINDS...Potential today for west winds of 20 to 30 mph with local gusts up to 45 mph in the warning area. For Tuesday westerly winds 20 to 30 mph with gusts to 40 mph. * RELATIVE HUMIDITY...Minimum RH 6 to 11 percent today and 10 to 15 percent Tuesday. * 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 Fire Weather Watch means that critical fire weather conditions may occur during the watch period. Listen for later forecasts and possible Red Flag Warnings. 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. && $$ Cerniglia Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
2 follow-up statements
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
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
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 22, 1:50 PM MST | Red Flag Warning | TWC | Cochise, Graham, Greenlee, Pima, Pinal, Santa Cruz | 28 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.