Alert archive / Arizona / Red Flag Warnings in 2021
Red Flag Warning 4, NWS Phoenix, AZ
NWS Phoenix, AZ issued this red flag warning at May 22, 2021, 3:11 AM MST for Gila County, Maricopa County, Pinal County, Arizona. It took effect at May 22, 2021, 12:00 PM MST. It was in force for 6 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
- May 22, 2021, 3:11 AM MST (10:11 UTC)
- In effect from
- May 22, 2021, 12:00 PM MST
- Expired
- May 22, 2021, 6:00 PM MST
- In force
- 6 hr
- Issued by
- NWS Phoenix, AZ
Counties Gila County, AZ, Maricopa County, AZ, Pinal County, AZ
The radar
The Phoenix radar (KIWA), 13 km from the middle of the area, began a volume at 10:14 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, 10.2 hours before the alert went out and 145 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
- 3593 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 70 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
537 WWUS85 KPSR 221011 RFWPSR URGENT - FIRE WEATHER MESSAGE National Weather Service Phoenix AZ 311 AM MST Sat May 22 2021 AZZ133-230100- /O.NEW.KPSR.FW.W.0004.210522T1900Z-210523T0100Z/ Southern Gila County/Tonto National Forest Foothills- 311 AM MST Sat May 22 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 6 PM MST THIS EVENING FOR STRONG WINDS, LOW RELATIVE HUMIDITY AND VERY HIGH FIRE DANGER FOR SOUTHEASTERN GILA COUNTY... The National Weather Service in Phoenix has issued a Red Flag Warning for strong winds, low relative humidity and high fire danger, which is in effect from noon today to 6 PM MST this evening. * AFFECTED AREA...Southern Gila County/Tonto National Forest Foothills. * TIMING...This afternoon. * WINDS...Southwest 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 7 percent. * IMPACTS...Fuels are dry and fire danger is very high. These conditions combined with low relative humidity and strong winds will lead to widespread hazardous fire weather conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Please advise the appropriate officials and fire crews in the field of this red flag warning. && $$ National Weather Service Phoenix is on the internet at weather.gov/phoenix
2 follow-up statements
662 WWUS85 KPSR 222219 RFWPSR URGENT - FIRE WEATHER MESSAGE National Weather Service Phoenix AZ 319 PM MST Sat May 22 2021 AZZ133-230100- /O.CON.KPSR.FW.W.0004.000000T0000Z-210523T0100Z/ Southern Gila County/Tonto National Forest Foothills- 319 PM MST Sat May 22 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM MST THIS EVENING FOR STRONG WINDS, LOW RELATIVE HUMIDITY AND VERY HIGH FIRE DANGER FOR SOUTHEASTERN GILA COUNTY... * AFFECTED AREA...Southern Gila County/Tonto National Forest Foothills. * TIMING...Until 6 pm MST. * WINDS...Southwest 20 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 7 percent. * IMPACTS...Fuels are dry and fire danger is very high. These conditions combined with low relative humidity and strong winds will lead to widespread hazardous fire weather conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Please advise the appropriate officials and fire crews in the field of this red flag warning. && $$ National Weather Service Phoenix is on the internet at weather.gov/phoenix
959 WWUS85 KPSR 230049 RFWPSR URGENT - FIRE WEATHER MESSAGE National Weather Service Phoenix AZ 549 PM MST Sat May 22 2021 AZZ133-230200- /O.EXP.KPSR.FW.W.0004.000000T0000Z-210523T0100Z/ Southern Gila County/Tonto National Forest Foothills- 549 PM MST Sat May 22 2021 ...RED FLAG WARNING WILL EXPIRE AT 6 PM MST THIS EVENING FOR STRONG WINDS, LOW RELATIVE HUMIDITY AND HIGH FIRE DANGER FOR SOUTHERN GILA COUNTY... Winds will weaken into the evening while RH values recover modestly overnight. Therefore, the Red Flag Warning will expire at 6 PM MST. $$ National Weather Service Phoenix is on the internet at weather.gov/phoenix
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.