Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 76, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 15, 2021, 9:58 PM MST for Gila County, Maricopa County, Pinal County, Arizona. It was in force for 47 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
- Aug 15, 2021, 9:58 PM MST (04:58 UTC)
- Expired
- Aug 15, 2021, 10:45 PM MST
- In force
- 47 min
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Hail
- 1.0 in
- Wind
- 70.0 mph
Counties Gila County, AZ, Maricopa County, AZ, Pinal County, AZ
The radar
The Phoenix radar (KIWA), 39 km from the middle of the area, began a volume at 05:01 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, 5.0 hours before the alert went out and 65 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
- 1548 J/kg
- Mixed-layer CIN
- -94 J/kg
- Mixed-layer LCL
- 2123 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- -22 m²/s²
- 0-3 km storm-relative helicity
- 56 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
409
WUUS55 KPSR 160458
SVRPSR
AZC007-013-021-160545-
/O.NEW.KPSR.SV.W.0076.210816T0458Z-210816T0545Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Phoenix AZ
958 PM MST Sun Aug 15 2021
The National Weather Service in Phoenix has issued a
* Severe Thunderstorm Warning for...
Gila County in east central Arizona...
Maricopa County in south central Arizona...
Pinal County in southeastern Arizona...
* Until 1045 PM MST.
* At 957 PM MST, a severe thunderstorm was located 9 miles southeast
of Apache Lake, or 12 miles north of Superior, moving southwest at
30 mph.
HAZARD...70 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect considerable
tree damage. Wind damage is also likely to mobile homes,
roofs, and outbuildings.
* Locations impacted include...
Apache Junction, Superior, Gold Canyon, Gold Camp, Lost Dutchman
State Park, Goldfield, Top-Of-The-World, Florence Junction, Queen
Valley, Superstition Mountains, Kings Ranch, Boyce Thompson
Arboretum and Tortilla Flat.
This includes the following highways...
US Highway 60 between mile markers 197 and 241.
AZ Route 79 between mile markers 143 and 150.
AZ Route 177 between mile markers 165 and 167.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3360 11109 3335 11089 3314 11130 3316 11145
3335 11156 3351 11151
TIME...MOT...LOC 0457Z 054DEG 27KT 3346 11116
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
SDB1 follow-up statement
839
WWUS55 KPSR 160519
SVSPSR
Severe Weather Statement
National Weather Service Phoenix AZ
1019 PM MST Sun Aug 15 2021
AZC007-160529-
/O.CAN.KPSR.SV.W.0076.000000T0000Z-210816T0545Z/
Gila AZ-
1019 PM MST Sun Aug 15 2021
...THE SEVERE THUNDERSTORM WARNING FOR GILA COUNTY IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3351 11119 3330 11106 3314 11130 3316 11145
3335 11156 3347 11152
TIME...MOT...LOC 0519Z 056DEG 36KT 3334 11133
$$
AZC013-021-160545-
/O.CON.KPSR.SV.W.0076.000000T0000Z-210816T0545Z/
Maricopa AZ-Pinal AZ-
1019 PM MST Sun Aug 15 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM MST
FOR MARICOPA AND PINAL COUNTIES...
At 1019 PM MST, a severe thunderstorm was located near Queen Valley,
or near Gold Canyon, moving southwest at 40 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Apache Junction, Superior, Gold Canyon, Florence Junction, Queen
Valley, Superstition Mountains, Gold Camp, Kings Ranch, Lost Dutchman
State Park, Goldfield and Boyce Thompson Arboretum.
This includes the following highways...
US Highway 60 between mile markers 197 and 229.
AZ Route 79 between mile markers 143 and 150.
AZ Route 177 near mile marker 167.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3351 11119 3330 11106 3314 11130 3316 11145
3335 11156 3347 11152
TIME...MOT...LOC 0519Z 056DEG 36KT 3334 11133
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
SDBThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 7:49 PM MST | Special Weather Statement | PSR | Gila | 56 min |
| Aug 15, 8:26 PM MST | Severe Thunderstorm Warning | PSR | Gila | 49 min |
| Aug 15, 9:14 PM MST | Severe Thunderstorm Warning | PSR | Gila, Maricopa, Pinal | 46 min |
| Aug 15, 9:18 PM MST | Special Weather Statement | PSR | Gila | 42 min |
| Aug 15, 10:14 PM MST | Flash Flood Warning | PSR | Gila | 4 hr |
| Aug 15, 10:31 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 44 min |
| Aug 15, 10:45 PM MST | Special Weather Statement | PSR | Pinal | 45 min |
| Aug 15, 10:50 PM MST | Flash Flood Warning | PSR | Gila, Maricopa, Pinal | 6 hr |
| Aug 15, 10:55 PM MST | Dust Storm Advisory | PSR | Maricopa, Pinal | 65 min |
| Aug 15, 10:58 PM MST | Areal Flood Advisory | PSR | Maricopa, Pinal | 3 hr |
| Aug 15, 11:14 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 46 min |
| Aug 15, 11:31 PM MST | Special Weather Statement | PSR | Maricopa | 44 min |
| Aug 15, 11:37 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 38 min |
| Aug 15, 11:44 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 32 min |
| Aug 15, 11:45 PM MST | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Aug 16, 12:18 AM MST | Special Weather Statement | PSR | 42 min | |
| Aug 16, 12:49 AM MST | Severe Thunderstorm Warning | PSR | La Paz, Maricopa | 56 min |
| Aug 16, 1:33 AM MST | Flash Flood Warning | PSR | La Paz, Maricopa | 6 hr |
| Aug 16, 1:47 AM MST | Special Weather Statement | PSR | La Paz | 58 min |
| Aug 16, 1:54 AM MST | Severe Thunderstorm Warning | PSR | La Paz | 66 min |
| Aug 16, 2:22 AM MST | Special Weather Statement | PSR | La Paz | 68 min |
| Aug 16, 2:53 AM MST | Flash Flood Warning | PSR | La Paz | 5 hr |
| Aug 16, 3:08 AM MST | Dust Storm Advisory | PSR | La Paz, Yuma | 2 hr |
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.