Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 9, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 9, 2021, 9:39 PM MST for Gila County, Maricopa County, Pinal County, Arizona. It was in force for 36 min. 4 reports 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 9, 2021, 9:39 PM MST (04:39 UTC)
- Expired
- Jul 9, 2021, 10:15 PM MST
- In force
- 36 min
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Gila County, AZ, Maricopa County, AZ, Pinal County, AZ
The radar
The Phoenix radar (KIWA), 49 km from the middle of the area, began a volume at 04:40 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 9, 9:57 PM MST | TSTM WND DMG | 7 Nw Florence Junction, AZ | ***DELAYED REPORT***28 DISTRIBUTION POLES DOWN ALONG US HWY 60 AT MP 206. PEAK WINDS ESTIMATED AT 60-65 MPH FROM 9:57-10:04 P.M. PER TPHX RADAR. |
| Jul 9, 10:10 PM MST | TSTM WND DMG | 9 Se Queen Creek, AZ | ***DELAYED REPORT***...NUMEROUS LARGE TREES 1-2 FEET IN DIAMETER UPROOTED NEAR AMIRA PARK AND IN JOHNSON RANCH. WINDS ESTIMATED AT 60 MPH WITH TIMING BASED ON RADAR. |
| Jul 9, 10:14 PM MST | TSTM WND GST 65 | 11 Ese Queen Creek, AZ | PEAK GUST AT SRP MESONET STATION QUAIL. |
| Jul 9, 10:15 PM MST | TSTM WND DMG | 3 Ne Queen Creek, AZ | ***DELAYED REPORT*** SWAMP COOLERS WERE RIPPED OFF A COUPLE OF BUILDING AND BENT SOME ROLLED UP GARAGE DOORS. A FIRE SPRINKLER WAS ALSO DAMAGED IN A BUILDING CAUSING THE SPRINKLER TO GO OFF. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Phoenix, AZ (KPSR), launched 00:00Z, 4.7 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
- 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.
337
WUUS55 KPSR 100439
SVRPSR
AZC007-013-021-100515-
/O.NEW.KPSR.SV.W.0009.210710T0439Z-210710T0515Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Phoenix AZ
939 PM MST Fri Jul 9 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 1015 PM MST.
* At 939 PM MST, severe thunderstorms were located along a line
extending from near Apache Lake to near Boyce Thompson Arboretum to
8 miles southeast of Superior, moving southwest at 35 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Mesa, Apache Junction, Florence, Superior, Gold Canyon, Queen
Creek, Gold Camp, Lost Dutchman State Park, Goldfield, Magma, San
Tan Valley, Top-Of-The-World, Florence Junction, Queen Valley and
Superstition Mountains.
* This includes the following highways...
US Highway 60 between mile markers 191 and 240.
AZ Route 202 between mile markers 29 and 32.
AZ Route 79 between mile markers 130 and 150.
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.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3342 11095 3322 11082 3317 11090 3324 11094
3324 11097 3300 11130 3295 11140 3310 11157
3341 11166 3366 11113
TIME...MOT...LOC 0439Z 057DEG 29KT 3352 11124 3334 11118 3319 11103
HAIL...0.88IN
WIND...60MPH
$$
SDB1 follow-up statement
022
WWUS55 KPSR 100448
SVSPSR
Severe Weather Statement
National Weather Service Phoenix AZ
948 PM MST Fri Jul 9 2021
AZC007-013-021-100515-
/O.CON.KPSR.SV.W.0009.000000T0000Z-210710T0515Z/
Gila AZ-Maricopa AZ-Pinal AZ-
948 PM MST Fri Jul 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM MST
FOR GILA...MARICOPA AND PINAL COUNTIES...
At 948 PM MST, severe thunderstorms were located along a line
extending from near Superstition Mountains to Queen Valley to near
Superior, moving southwest at 45 mph.
HAZARD...70 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Mesa, Apache Junction, Florence, Superior, Gold Canyon, Queen Creek,
Gold Camp, Lost Dutchman State Park, Goldfield, Magma, San Tan
Valley, Top-Of-The-World, Florence Junction, Queen Valley and
Superstition Mountains.
This includes the following highways...
US Highway 60 between mile markers 191 and 240.
AZ Route 202 between mile markers 29 and 32.
AZ Route 79 between mile markers 130 and 150.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3340 11094 3322 11082 3317 11090 3323 11093
3324 11093 3324 11097 3300 11130 3295 11140
3310 11157 3341 11166 3366 11113
TIME...MOT...LOC 0448Z 058DEG 40KT 3343 11135 3330 11127 3321 11108
HAIL...0.88IN
WIND...70MPH
$$
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, 9:54 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, 11:22 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 38 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.