Alert archive / Arizona / Red Flag Warnings in 2021
Red Flag Warning 2, NWS Tucson, AZ
NWS Tucson, AZ issued this red flag warning at Mar 2, 2021, 2:40 PM MST for 4 counties in Arizona. It took effect at Mar 3, 2021, 11:00 AM MST. It was in force for 7 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 2, 2021, 2:40 PM MST (21:40 UTC)
- In effect from
- Mar 3, 2021, 11:00 AM MST
- Expired
- Mar 3, 2021, 6:00 PM MST
- In force
- 7 hr
- Issued by
- NWS Tucson, AZ
Counties Cochise County, AZ, Pima County, AZ, Pinal County, AZ, Santa Cruz County, AZ
The radar
The Tucson radar (KEMX), 37 km from the middle of the area, began a volume at 21:41 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 3, 5:00 PM MST | NON-TSTM WND DMG | 1 Wsw Apache Junction, AZ | A SMALL PORTION OF A ROOF APPROXIMATELY 4FT BY 5FT LOST SOME ASPHALT SHINGLES NEAR BROADWAY RD. AND IRONWOOD RD. ESTIMATED WIND GUST OF 50 MPH. TIME ESTIMATED. |
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, 9.7 hours before the alert went out and 8 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
- 3702 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 92 m²/s²
- 0-3 km storm-relative helicity
- 142 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
693 WWUS85 KTWC 022140 RFWTWC URGENT - FIRE WEATHER MESSAGE National Weather Service Tucson AZ 240 PM MST Tue Mar 2 2021 AZZ150-031200- /O.UPG.KTWC.FW.A.0002.210303T1800Z-210304T0100Z/ /O.NEW.KTWC.FW.W.0002.210303T1800Z-210304T0100Z/ Arizona Fire Weather Zone 150 Sonoran FDRA-Most of Pima County-South Central Pinal County- Tohono O'odham Nation-Tucson Metropolitan area-TDC- 240 PM MST Tue Mar 2 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 6 PM MST WEDNESDAY FOR STRONG AND GUSTY SOUTH TO SOUTHWEST WINDS, LOW RELATIVE HUMIDITY AND A HIGH FIRE DANGER FOR FIRE WEATHER ZONE 150... The National Weather Service in Tucson has issued a Red Flag Warning, which is in effect from 11 AM to 6 PM MST Wednesday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire weather zone 150. * TIMING...Late Wednesday morning through Wednesday afternoon. * WINDS...South to southwest 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...9 to 15 percent. * 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. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
2 follow-up statements
297 WWUS85 KTWC 030912 RFWTWC URGENT - FIRE WEATHER MESSAGE National Weather Service Tucson AZ 212 AM MST Wed Mar 3 2021 AZZ151-040100- /O.EXA.KTWC.FW.W.0002.210303T1800Z-210304T0100Z/ Arizona Fire Weather Zone 151 Western half Desert Grasslands FDRA including elevations up to 5500 feet in Southeast corner of Pinal County- Extreme Eastern Pima County-Western third of Cochise County- Santa Cruz County-TDC- 212 AM MST Wed Mar 3 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 6 PM MST THIS EVENING FOR STRONG AND GUSTY SOUTH TO SOUTHWEST WINDS, LOW RELATIVE HUMIDITY AND A HIGH FIRE DANGER FOR SOUTHERN SECTIONS OF FIRE WEATHER ZONE 151... The National Weather Service in Tucson has issued a Red Flag Warning, which is in effect from 11 AM this morning to 6 PM MST this evening. * AFFECTED AREA...Southern sections of fire weather zone 151 including Santa Cruz County. * TIMING...11 AM this morning to 6 PM MST this eveing. * WINDS...South to southwest 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...9 to 15 percent. * IMPACTS...Any fires that develop or are ongoing will have the potential to spread rapidly. * FOR A DETAILED VIEW OF THE HAZARD AREA...Visit weather.gov/Tucson and click on the Detailed Hazards Icon. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are expected to develop. A combination of strong winds...low relative humidity...and dry vegetation will create the potential for rapid and erratic fire growth. Please advise the appropriate officials or fire crews in the field of the Red Flag Warning for portions of Southeast Arizona. && $$ AZZ150-040100- /O.CON.KTWC.FW.W.0002.210303T1800Z-210304T0100Z/ Arizona Fire Weather Zone 150 Sonoran FDRA-Most of Pima County-South Central Pinal County- Tohono O'odham Nation-Tucson Metropolitan area-TDC- 212 AM MST Wed Mar 3 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 6 PM MST THIS EVENING FOR STRONG AND GUSTY SOUTH TO SOUTHWEST WINDS, LOW RELATIVE HUMIDITY AND A HIGH FIRE DANGER FOR FIRE WEATHER ZONE 150... * AFFECTED AREA...Fire weather zone 150. * TIMING...11 AM this morning to 6 PM MST this evening. . * WINDS...South to southwest 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...9 to 15 percent. * 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. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
850 WWUS85 KTWC 040115 RFWTWC URGENT - FIRE WEATHER MESSAGE National Weather Service Tucson AZ 615 PM MST Wed Mar 3 2021 AZZ150-151-040215- /O.EXP.KTWC.FW.W.0002.000000T0000Z-210304T0100Z/ Arizona Fire Weather Zone 150 Sonoran FDRA-Most of Pima County-South Central Pinal County- Tohono O'odham Nation-Tucson Metropolitan area-TDC- Arizona Fire Weather Zone 151 Western half Desert Grasslands FDRA including elevations up to 5500 feet in Southeast corner of Pinal County- Extreme Eastern Pima County-Western third of Cochise County- Santa Cruz County-TDC- 615 PM MST Wed Mar 3 2021 ...RED FLAG WARNING HAS EXPIRED FOR STRONG AND GUSTY SOUTH TO SOUTHWEST WINDS, LOW RELATIVE HUMIDITY AND A HIGH FIRE DANGER FOR FIRE WEATHER ZONES 150 AND 151... Winds will slowly diminish through the evening hours. $$ 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 2, 2:18 AM MST | Fire Weather Watch | TWC | Pima, Pinal | 12 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.