Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 22, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 10, 2021, 9:00 PM MST for Maricopa County, Pinal County, Arizona. It was in force for 45 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 10, 2021, 9:00 PM MST (04:00 UTC)
- Expired
- Jul 10, 2021, 9:45 PM MST
- In force
- 45 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), 83 km from the middle of the area, began a volume at 04:02 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 10, 9:14 PM MST | TSTM WND GST 65 | 2 Se Mobile, AZ | ***DELAYED REPORT*** MESONET STATION MAMO 2.2 SE MOBILE (AZ ALERT). |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 10, 4:52 PM MST | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Phoenix, AZ (KPSR), launched 00:00Z, 4.0 hours before the alert went out and 79 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
- 965 J/kg
- Mixed-layer CIN
- -311 J/kg
- Mixed-layer LCL
- 3378 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 116 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
858
WUUS55 KPSR 110400
SVRPSR
AZC013-021-110445-
/O.NEW.KPSR.SV.W.0022.210711T0400Z-210711T0445Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Phoenix AZ
900 PM MST Sat Jul 10 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 945 PM MST.
* At 859 PM MST, the leading edge of strong outflow winds from
strong thunderstorms were located along a line extending from 10
miles south of Estrella Mountain Ranch to Estrella to Freeman,
moving west at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Gila Bend, Maricopa, Estrella, Big Horn, Bosque, Cotton Center,
Freeman, Gila Bend Auxiliary Field, Estrella Sailport, Sonoran
National Monument, Mobile, Rainbow Valley, Stanfield and Ak-
Chin Village.
* This includes the following highways...
AZ Interstate 8 between mile markers 100 and 170.
AZ Route 238 between mile markers 1 and 44.
AZ Route 85 between mile markers 1 and 24, and between mile markers
119 and 140.
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 these storms. 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.
&&
LAT...LON 3257 11284 3288 11300 3318 11299 3326 11238
3312 11202 3276 11177 3279 11187 3276 11205
3272 11207 3272 11214 3268 11215 3268 11220
3255 11220 3252 11227
TIME...MOT...LOC 0359Z 070DEG 36KT 3318 11244 3301 11241 3283 11229
HAIL...<.75IN
WIND...60MPH
$$
SDB2 follow-up statements
706
WWUS55 KPSR 110429
SVSPSR
Severe Weather Statement
National Weather Service Phoenix AZ
929 PM MST Sat Jul 10 2021
AZC013-021-110445-
/O.CON.KPSR.SV.W.0022.000000T0000Z-210711T0445Z/
Maricopa AZ-Pinal AZ-
929 PM MST Sat Jul 10 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM MST
FOR MARICOPA AND PINAL COUNTIES...
At 928 PM MST, the leading edge of strong outflow winds from strong
thunderstorms was located along a line extending from near Cotton
Center to near Gila Bend Auxiliary Field to 13 miles southwest of
Big Horn, moving west at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Gila Bend, Maricopa, Estrella, Freeman, Big Horn, Gila Bend Auxiliary
Field, Bosque, Estrella Sailport, Sonoran National Monument,
Stanfield, Ak-Chin Village and Mobile.
This includes the following highways...
AZ Interstate 8 between mile markers 100 and 168.
AZ Route 238 between mile markers 1 and 44.
AZ Route 85 between mile markers 1 and 24, and between mile markers
119 and 127.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3292 11300 3303 11273 3310 11214 3310 11201
3278 11182 3278 11183 3279 11187 3276 11205
3272 11207 3272 11214 3268 11215 3268 11220
3255 11220 3252 11227 3257 11284 3288 11300
TIME...MOT...LOC 0428Z 070DEG 34KT 3307 11272 3290 11268 3272 11256
HAIL...<.75IN
WIND...60MPH
$$
SDB748
WWUS55 KPSR 110444
SVSPSR
Severe Weather Statement
National Weather Service Phoenix AZ
944 PM MST Sat Jul 10 2021
AZC013-021-110454-
/O.EXP.KPSR.SV.W.0022.000000T0000Z-210711T0445Z/
Maricopa AZ-Pinal AZ-
944 PM MST Sat Jul 10 2021
...THE SEVERE THUNDERSTORM WARNING FOR MARICOPA AND PINAL COUNTIES
WILL EXPIRE AT 945 PM MST...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with these thunderstorms.
A Severe Thunderstorm Watch remains in effect until midnight MST for
south central and southeastern Arizona.
LAT...LON 3292 11300 3303 11273 3310 11214 3310 11201
3278 11182 3278 11183 3279 11187 3276 11205
3272 11207 3272 11214 3268 11215 3268 11220
3255 11220 3252 11227 3257 11284 3288 11300
TIME...MOT...LOC 0444Z 070DEG 36KT 3302 11288 3285 11284 3267 11272
$$
SDBThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 5:37 PM MST | Special Weather Statement | PSR | Gila | 38 min |
| Jul 10, 5:45 PM MST | Severe Thunderstorm Warning | PSR | Gila | 45 min |
| Jul 10, 6:06 PM MST | Special Weather Statement | PSR | Gila | 39 min |
| Jul 10, 6:24 PM MST | Severe Thunderstorm Warning | PSR | Gila, Maricopa, Pinal | 36 min |
| Jul 10, 6:42 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 33 min |
| Jul 10, 7:00 PM MST | Severe Thunderstorm Warning | PSR | Gila, Maricopa, Pinal | 45 min |
| Jul 10, 7:10 PM MST | Flash Flood Warning | PSR | Gila | 4 hr |
| Jul 10, 7:12 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 33 min |
| Jul 10, 7:27 PM MST | Dust Storm Warning | PSR | Maricopa | 63 min |
| Jul 10, 7:31 PM MST | Dust Storm Warning | PSR | Maricopa, Pinal | 59 min |
| Jul 10, 7:45 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 30 min |
| Jul 10, 8:16 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 44 min |
| Jul 10, 8:29 PM MST | Dust Storm Warning | PSR | Maricopa, Pinal | 91 min |
| Jul 10, 8:42 PM MST | Areal Flood Advisory | PSR | Maricopa, Pinal | 3 hr |
| Jul 10, 9:48 PM MST | Special Weather Statement | PSR | 57 min | |
| Jul 10, 9:54 PM MST | Special Weather Statement | PSR | Pinal | 36 min |
| Jul 10, 10:25 PM MST | Special Weather Statement | PSR | 35 min | |
| Jul 10, 10:31 PM MST | Dust Storm Advisory | PSR | Maricopa, Yuma | 89 min |
| Jul 10, 10:43 PM MST | Dust Storm Warning | PSR | Maricopa, Yuma | 62 min |
| Jul 10, 11:19 PM MST | Dust Storm Warning | PSR | Yuma | 56 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.