Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 14, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 9, 2021, 11:22 PM MST for Maricopa County, Pinal County, Arizona. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 9, 2021, 11:22 PM MST (06:22 UTC)
- Expired
- Jul 10, 2021, 12:00 AM MST
- In force
- 38 min
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Maricopa County, AZ, Pinal County, AZ
The radar
The Phoenix radar (KIWA), 80 km from the middle of the area, began a volume at 06:24 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
Phoenix, AZ (KPSR), launched 00:00Z, 6.4 hours before the alert went out and 66 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
- 1011 J/kg
- Mixed-layer CIN
- -182 J/kg
- Mixed-layer LCL
- 3280 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- -35 m²/s²
- 0-3 km storm-relative helicity
- 54 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
568 WUUS55 KPSR 100622 SVRPSR AZC013-021-100700- /O.NEW.KPSR.SV.W.0014.210710T0622Z-210710T0700Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Phoenix AZ 1122 PM MST Fri Jul 9 2021 The National Weather Service in Phoenix has issued a * Severe Thunderstorm Warning for... Maricopa County in south central Arizona... Pinal County in southeastern Arizona... * Until midnight MST. * At 1122 PM MST, a severe thunderstorm was located over Estrella, or 17 miles east of Gila Bend, moving west at 25 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Gila Bend, Estrella, Freeman, Big Horn, Gila Bend Auxiliary Field, Bosque, Sonoran National Monument and Mobile. * This includes the following highways... AZ Interstate 8 between mile markers 113 and 143. AZ Route 238 between mile markers 1 and 33. AZ Route 85 between mile markers 1 and 7, and between mile markers 119 and 130. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Large hail and damaging winds and continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3311 11225 3286 11216 3277 11275 3307 11281 TIME...MOT...LOC 0622Z 082DEG 23KT 3299 11239 HAIL...<.75IN WIND...60MPH $$ SDB
2 follow-up statements
078
WWUS55 KPSR 100649
SVSPSR
Severe Weather Statement
National Weather Service Phoenix AZ
1149 PM MST Fri Jul 9 2021
AZC021-100658-
/O.CAN.KPSR.SV.W.0014.000000T0000Z-210710T0700Z/
Pinal AZ-
1149 PM MST Fri Jul 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR PINAL COUNTY IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3310 11242 3283 11233 3277 11275 3307 11281
TIME...MOT...LOC 0648Z 082DEG 23KT 3297 11259
$$
AZC013-100700-
/O.CON.KPSR.SV.W.0014.000000T0000Z-210710T0700Z/
Maricopa AZ-
1149 PM MST Fri Jul 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MST
FOR MARICOPA COUNTY...
At 1148 PM MST, a severe thunderstorm was located over Bosque, or
near Gila Bend, moving west at 25 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Gila Bend, Estrella, Gila Bend Auxiliary Field, Bosque, Sonoran
National Monument and Big Horn.
This includes the following highways...
AZ Interstate 8 between mile markers 113 and 139.
AZ Route 238 between mile markers 1 and 19.
AZ Route 85 between mile markers 1 and 7, and between mile markers
119 and 130.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3310 11242 3283 11233 3277 11275 3307 11281
TIME...MOT...LOC 0648Z 082DEG 23KT 3297 11259
HAIL...<.75IN
WIND...60MPH
$$
SDB355
WWUS55 KPSR 100655
SVSPSR
Severe Weather Statement
National Weather Service Phoenix AZ
1155 PM MST Fri Jul 9 2021
AZC013-100705-
/O.EXP.KPSR.SV.W.0014.000000T0000Z-210710T0700Z/
Maricopa AZ-
1155 PM MST Fri Jul 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR MARICOPA COUNTY WILL EXPIRE AT
MIDNIGHT MST...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds are still possible with this thunderstorm.
LAT...LON 3310 11242 3283 11233 3277 11275 3307 11281
TIME...MOT...LOC 0655Z 082DEG 23KT 3297 11262
$$
SDBThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 5:36 PM MST | Flash Flood Warning | PSR | Gila | 6 hr |
| Jul 9, 5:36 PM MST | Special Weather Statement | PSR | Gila | 24 min |
| Jul 9, 6:23 PM MST | Special Weather Statement | PSR | 52 min | |
| Jul 9, 7:45 PM MST | Special Weather Statement | PSR | 30 min | |
| Jul 9, 8:15 PM MST | Severe Thunderstorm Warning | PSR | Gila | 45 min |
| Jul 9, 8:58 PM MST | Severe Thunderstorm Warning | PSR | Gila, Maricopa, Pinal | 47 min |
| Jul 9, 9:18 PM MST | Flash Flood Warning | PSR | Gila | 4 hr |
| Jul 9, 9:18 PM MST | Special Weather Statement | PSR | Pinal | 42 min |
| Jul 9, 9:32 PM MST | Flash Flood Warning | PSR | Gila, Pinal | 4 hr |
| Jul 9, 9:39 PM MST | Severe Thunderstorm Warning | PSR | Gila, Maricopa, Pinal | 36 min |
| Jul 9, 9:54 PM MST | Dust Storm Advisory | PSR | Maricopa, Pinal | 51 min |
| Jul 9, 10:06 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 39 min |
| Jul 9, 10:21 PM MST | Dust Storm Warning | PSR | Maricopa, Pinal | 54 min |
| Jul 9, 10:30 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 45 min |
| Jul 9, 10:32 PM MST | Flash Flood Warning | PSR | Pinal | 4 hr |
| Jul 9, 10:44 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 31 min |
| Jul 9, 10:52 PM MST | Areal Flood Advisory | PSR | Maricopa, Pinal | 3 hr |
| Jul 9, 11:12 PM MST | Dust Storm Advisory | PSR | Maricopa | 63 min |
| Jul 9, 11:15 PM MST | Dust Storm Warning | PSR | Maricopa, Pinal | 60 min |
| Jul 9, 11:19 PM MST | Severe Thunderstorm Warning | PSR | Pinal | 26 min |
| Jul 9, 11:31 PM MST | Dust Storm Advisory | PSR | Maricopa | 44 min |
| Jul 9, 11:33 PM MST | Flash Flood Warning | PSR | Maricopa, Pinal | 4 hr |
| Jul 10, 1:02 AM MST | Special Weather Statement | PSR | Yuma | 28 min |
| Jul 10, 1:57 PM MST | Blowing Dust Advisory | PSR | Maricopa, Pinal | 9 hr |
| Jul 10, 2:27 PM MST | Special Weather Statement | PSR | Gila | 48 min |
| Jul 10, 3:15 PM MST | Special Weather Statement | PSR | Gila | 45 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2021Every severe thunderstorm 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.