Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 38, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 29, 2021, 1:42 PM MST for Maricopa County, Arizona. It was in force for 48 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 29, 2021, 1:42 PM MST (20:42 UTC)
- Expired
- Jul 29, 2021, 2:30 PM MST
- In force
- 48 min
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Maricopa County, AZ
The radar
The Phoenix radar (KIWA), 104 km from the middle of the area, began a volume at 20:45 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 12:00Z, 8.7 hours before the alert went out and 89 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
- 371 J/kg
- Mixed-layer CIN
- -231 J/kg
- Mixed-layer LCL
- 2650 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 5 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
144
WUUS55 KPSR 292042
SVRPSR
AZC013-292130-
/O.NEW.KPSR.SV.W.0038.210729T2042Z-210729T2130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Phoenix AZ
142 PM MST Thu Jul 29 2021
The National Weather Service in Phoenix has issued a
* Severe Thunderstorm Warning for...
Maricopa County in south central Arizona...
* Until 230 PM MST.
* At 142 PM MST, a severe thunderstorm was located 7 miles southeast
of Gila Bend Auxiliary Field, or 10 miles south of Gila Bend,
moving west at 5 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Gila Bend, Gila Bend Auxiliary Field and Bosque.
* This includes the following highways...
AZ Interstate 8 between mile markers 107 and 131.
AZ Route 238 between mile markers 1 and 5.
AZ Route 85 between mile markers 1 and 12, and between mile markers
119 and 124.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3290 11247 3269 11259 3282 11288 3295 11290
3303 11272
TIME...MOT...LOC 2042Z 112DEG 6KT 3280 11263
HAIL...1.00IN
WIND...60MPH
$$
JS2 follow-up statements
319
WWUS55 KPSR 292053
SVSPSR
Severe Weather Statement
National Weather Service Phoenix AZ
153 PM MST Thu Jul 29 2021
AZC013-292130-
/O.CON.KPSR.SV.W.0038.000000T0000Z-210729T2130Z/
Maricopa AZ-
153 PM MST Thu Jul 29 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM MST
FOR MARICOPA COUNTY...
At 153 PM MST, a severe thunderstorm was located 7 miles southeast of
Gila Bend Auxiliary Field, or 10 miles south of Gila Bend, moving
west at 5 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Gila Bend, Gila Bend Auxiliary Field and Bosque.
This includes the following highways...
AZ Interstate 8 between mile markers 107 and 131.
AZ Route 238 between mile markers 1 and 5.
AZ Route 85 between mile markers 1 and 12, and between mile markers
119 and 124.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3290 11247 3269 11259 3282 11288 3295 11290
3303 11272
TIME...MOT...LOC 2053Z 112DEG 6KT 3281 11265
HAIL...1.00IN
WIND...60MPH
$$
JS415
WWUS55 KPSR 292124
SVSPSR
Severe Weather Statement
National Weather Service Phoenix AZ
224 PM MST Thu Jul 29 2021
AZC013-292130-
/O.CON.KPSR.SV.W.0038.000000T0000Z-210729T2130Z/
Maricopa AZ-
224 PM MST Thu Jul 29 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM MST
FOR MARICOPA COUNTY...
At 224 PM MST, a severe thunderstorm was located near Gila Bend
Auxiliary Field, or 8 miles south of Gila Bend, moving west at 5 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Gila Bend, Gila Bend Auxiliary Field and Bosque.
This includes the following highways...
AZ Interstate 8 between mile markers 107 and 131.
AZ Route 238 between mile markers 1 and 5.
AZ Route 85 between mile markers 1 and 12, and between mile markers
119 and 124.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3290 11247 3269 11259 3282 11288 3295 11290
3303 11272
TIME...MOT...LOC 2124Z 112DEG 6KT 3283 11271
HAIL...1.00IN
WIND...60MPH
$$
JSThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 12:56 PM MST | Special Weather Statement | PSR | Maricopa | 49 min |
| Jul 29, 1:14 PM MST | Special Weather Statement | PSR | 46 min | |
| Jul 29, 1:22 PM MST | Special Weather Statement | PSR | Yuma | 38 min |
| Jul 29, 1:24 PM MST | Special Weather Statement | PSR | Gila | 51 min |
| Jul 29, 1:26 PM MST | Flash Flood Watch | PSR | La Paz, Maricopa, Yuma | 40 hr |
| Jul 29, 1:33 PM MST | Special Weather Statement | PSR | Gila | 42 min |
| Jul 29, 1:35 PM MST | Areal Flood Advisory | PSR | Maricopa | 22 min |
| Jul 29, 1:36 PM MST | Flash Flood Warning | PSR | Gila | 6 hr |
| Jul 29, 1:57 PM MST | Flash Flood Warning | PSR | Maricopa | 4 hr |
| Jul 29, 1:58 PM MST | Severe Thunderstorm Warning | PSR | Gila, Pinal | 47 min |
| Jul 29, 2:07 PM MST | Special Weather Statement | PSR | 53 min | |
| Jul 29, 2:11 PM MST | Special Weather Statement | PSR | Yuma | 49 min |
| Jul 29, 2:25 PM MST | Areal Flood Advisory | PSR | La Paz, Maricopa | 3 hr |
| Jul 29, 2:32 PM MST | Special Weather Statement | PSR | Yuma | 43 min |
| Jul 29, 2:35 PM MST | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Jul 29, 2:44 PM MST | Special Weather Statement | PSR | Gila | 46 min |
| Jul 29, 3:00 PM MST | Flash Flood Warning | PSR | Maricopa | 4 hr |
| Jul 29, 3:04 PM MST | Special Weather Statement | PSR | La Paz | 41 min |
| Jul 29, 3:17 PM MST | Flash Flood Warning | PSR | Gila | 3 hr |
| Jul 29, 3:19 PM MST | Special Weather Statement | PSR | Yuma | 41 min |
| Jul 29, 3:23 PM MST | Special Weather Statement | PSR | Gila | 52 min |
| Jul 29, 3:53 PM MST | Areal Flood Advisory | PSR | La Paz, Maricopa, Yuma | 3 hr |
| Jul 29, 3:56 PM MST | Flash Flood Warning | PSR | Gila | 4 hr |
| Jul 29, 3:59 PM MST | Special Weather Statement | PSR | 61 min | |
| Jul 29, 4:00 PM MST | Areal Flood Advisory | PSR | La Paz | 3 hr |
| Jul 29, 4:17 PM MST | Special Weather Statement | PSR | La Paz | 58 min |
| Jul 29, 4:18 PM MST | Areal Flood Advisory | PSR | La Paz | 3 hr |
| Jul 29, 4:40 PM MST | Areal Flood Advisory | PSR | La Paz | 3 hr |
| Jul 29, 4:42 PM MST | Areal Flood Advisory | PSR | Yuma | 3 hr |
| Jul 29, 4:48 PM MST | Special Weather Statement | PSR | 57 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.