Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 84, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 16, 2021, 9:22 PM MST for Gila County, 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
- Aug 16, 2021, 9:22 PM MST (04:22 UTC)
- Expired
- Aug 16, 2021, 10:00 PM MST
- In force
- 38 min
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Gila County, AZ, Maricopa County, AZ, Pinal County, AZ
The radar
The Phoenix radar (KIWA), 71 km from the middle of the area, began a volume at 04:23 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 16, 3:54 PM MST | Severe Thunderstorm Watch | SPC | 10 hr |
The nearest sounding before it
Phoenix, AZ (KPSR), launched 00:00Z, 4.4 hours before the alert went out and 86 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
- 2667 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1942 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
780
WUUS55 KPSR 170422
SVRPSR
AZC007-013-021-170500-
/O.NEW.KPSR.SV.W.0084.210817T0422Z-210817T0500Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Phoenix AZ
922 PM MST Mon Aug 16 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 1000 PM MST.
* At 922 PM MST, severe thunderstorms were located along a line
extending from 6 miles east of Jakes Corner to Roosevelt Dam to
near Claypool, moving west at 10 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Globe, Roosevelt, Miami, Punkin Center, Roosevelt Dam, Claypool,
Central Heights-Midland City, Tonto Basin, Tonto National Monument,
Four Peaks, Apache Lake, Inspiration and Roosevelt Estates.
This includes the following highways...
US Highway 60 between mile markers 240 and 261.
AZ Route 87 between mile markers 220 and 229.
AZ Route 70 between mile markers 253 and 255.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
If on or near Roosevelt Lake, get away from the water and move
indoors or inside a vehicle. Remember, lightning can strike out to
15 miles from the parent thunderstorm. If you can hear thunder, you
are close enough to be struck by lightning. Move to safe shelter
now! Do not be caught on the water in a thunderstorm.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3396 11139 3391 11128 3380 11115 3376 11100
3364 11092 3365 11089 3345 11062 3337 11069
3334 11090 3366 11139 3401 11149 3401 11143
TIME...MOT...LOC 0422Z 081DEG 10KT 3402 11120 3370 11114 3349 11077
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
AD1 follow-up statement
763
WWUS55 KPSR 170437
SVSPSR
Severe Weather Statement
National Weather Service Phoenix AZ
937 PM MST Mon Aug 16 2021
AZC007-013-021-170500-
/O.CON.KPSR.SV.W.0084.000000T0000Z-210817T0500Z/
Gila AZ-Maricopa AZ-Pinal AZ-
937 PM MST Mon Aug 16 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM MST
FOR GILA...MARICOPA AND PINAL COUNTIES...
At 936 PM MST, severe thunderstorms were located along a line
extending from near Jakes Corner to Roosevelt Dam to near Claypool,
moving west at 10 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Globe, Roosevelt, Miami, Punkin Center, Roosevelt Dam, Claypool,
Tonto Basin,Apache Lake, and Roosevelt Estates.
This includes the following highways...
US Highway 60 between mile markers 240 and 261.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
If on or near Roosevelt Lake, get away from the water and move
indoors or inside a vehicle. remember, lightning can strike out to
15 miles from the parent thunderstorm. If you can hear thunder, you
are close enough to be struck by lightning. Do not be caught on the
water in a thunderstorm.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3396 11139 3391 11128 3380 11115 3376 11100
3364 11092 3365 11089 3345 11062 3337 11069
3334 11090 3366 11139 3401 11149 3401 11143
TIME...MOT...LOC 0436Z 081DEG 10KT 3401 11124 3369 11118 3349 11081
HAIL...0.75IN
WIND...60MPH
$$
ADThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 5:15 PM MST | Special Weather Statement | PSR | Gila | 45 min |
| Aug 16, 5:46 PM MST | Special Weather Statement | PSR | 44 min | |
| Aug 16, 6:07 PM MST | Special Weather Statement | PSR | Gila | 38 min |
| Aug 16, 6:14 PM MST | Severe Thunderstorm Warning | PSR | Gila | 46 min |
| Aug 16, 6:37 PM MST | Special Weather Statement | PSR | Pinal | 53 min |
| Aug 16, 6:55 PM MST | Flash Flood Warning | PSR | Gila | 6 hr |
| Aug 16, 8:24 PM MST | Special Weather Statement | PSR | 51 min | |
| Aug 16, 8:41 PM MST | Flash Flood Warning | PSR | Maricopa | 5 hr |
| Aug 16, 8:53 PM MST | Special Weather Statement | PSR | Gila | 52 min |
| Aug 16, 9:08 PM MST | Special Weather Statement | PSR | Gila | 52 min |
| Aug 16, 9:41 PM MST | Severe Thunderstorm Warning | PSR | Gila, Maricopa, Pinal | 49 min |
| Aug 16, 9:49 PM MST | Severe Thunderstorm Warning | PSR | Gila, Maricopa | 41 min |
| Aug 16, 10:01 PM MST | Flash Flood Warning | PSR | Gila | 4 hr |
| Aug 16, 10:01 PM MST | Special Weather Statement | PSR | 44 min | |
| Aug 16, 10:05 PM MST | Flash Flood Warning | PSR | Gila | 4 hr |
| Aug 16, 10:14 PM MST | Severe Thunderstorm Warning | PSR | Gila, Maricopa, Pinal | 46 min |
| Aug 16, 10:22 PM MST | Flash Flood Warning | PSR | Gila | 10 hr |
| Aug 16, 10:28 PM MST | Flash Flood Warning | PSR | Gila, Maricopa, Pinal | 10 hr |
| Aug 16, 10:36 PM MST | Flash Flood Warning | PSR | Gila, Maricopa | 10 hr |
| Aug 16, 10:38 PM MST | Dust Storm Advisory | PSR | Maricopa, Pinal | 67 min |
| Aug 16, 10:48 PM MST | Flash Flood Warning | PSR | Maricopa, Pinal | 9 hr |
| Aug 16, 10:54 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 51 min |
| Aug 16, 10:58 PM MST | Flash Flood Warning | PSR | Maricopa | 7 hr |
| Aug 16, 11:04 PM MST | Dust Storm Warning | PSR | Maricopa, Pinal | 56 min |
| Aug 16, 11:07 PM MST | Flash Flood Warning | PSR | Maricopa, Pinal | 7 hr |
| Aug 16, 11:16 PM MST | Flash Flood Warning | PSR | Maricopa | 7 hr |
| Aug 16, 11:26 PM MST | Flash Flood Warning | PSR | Maricopa, Pinal | 8 hr |
| Aug 16, 11:31 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 44 min |
| Aug 16, 11:41 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 49 min |
| Aug 16, 11:47 PM MST | Dust Storm Warning | PSR | Maricopa | 58 min |
| Aug 16, 11:50 PM MST | Special Weather Statement | PSR | 40 min | |
| Aug 16, 11:52 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 38 min |
| Aug 16, 11:56 PM MST | Flash Flood Warning | PSR | Pinal | 7 hr |
| Aug 16, 11:59 PM MST | Flash Flood Warning | PSR | Maricopa | 6 hr |
| Aug 17, 12:01 AM MST | Dust Storm Warning | PSR | Maricopa, Pinal | 59 min |
| Aug 17, 12:09 AM MST | Flash Flood Warning | PSR | Maricopa, Pinal | 8 hr |
| Aug 17, 12:32 AM MST | Special Weather Statement | PSR | 43 min | |
| Aug 17, 12:36 AM MST | Special Weather Statement | PSR | Maricopa | 24 min |
| Aug 17, 4:05 AM MST | Areal Flood Advisory | PSR | Maricopa | 4 hr |
| Aug 17, 4:26 AM MST | Flash Flood Warning | PSR | Maricopa | 6 hr |
| Aug 17, 5:29 AM MST | Special Weather Statement | PSR | Maricopa | 76 min |
| Aug 17, 5:35 AM MST | Flash Flood Warning | PSR | Maricopa | 6 hr |
| Aug 17, 6:26 AM MST | Flash Flood Warning | PSR | Gila, Pinal | 5 hr |
| Aug 17, 8:42 AM MST | Areal Flood Warning | PSR | Gila | 5 days |
| Aug 17, 4:46 PM MST | Special Weather Statement | PSR | 44 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.