Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 10, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 9, 2021, 10:06 PM MST for Maricopa County, Pinal County, Arizona. It was in force for 39 min. 9 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, 10:06 PM MST (05:06 UTC)
- Expired
- Jul 9, 2021, 10:45 PM MST
- In force
- 39 min
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 70.0 mph
Counties Maricopa County, AZ, Pinal County, AZ
The radar
The Phoenix radar (KIWA), 39 km from the middle of the area, began a volume at 05:06 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, 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, 10:10 PM MST | TSTM WND GST 60 | Phoenix Mesa Gateway, AZ | KIWA METAR OBSERVATION. |
| 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. |
| Jul 9, 10:20 PM MST | TSTM WND GST 61 | 1 Nne Queen Creek, AZ | ***DELAYED REPORT***PEAK GUST AT SRP MESONET STATION RITTENHOUSE. |
| Jul 9, 10:32 PM MST | TSTM WND DMG | 2 Nnw Higley, AZ | ***DELAYED REPORT***LARGE TREE UPROOTED AT PARK NEAR GREENFIELD AND WARNER. WINDS ESTIMATED AT 55-60 MPH BASED ON RADAR, NEARBY OBSERVATIONS, AND OTHER DAMAGE. |
| Jul 9, 10:32 PM MST | TSTM WND DMG | 6 Nne Santan, AZ | ***DELAYED REPORT*** LARGE METAL ROOF BLOWN ACROSS VAL VISTA DR. NEARBY, 8 INCH DIAMETER BRANCHES SNAPPED FROM A PALO VERDE TREE AND FELL ONTO THE ROOF OF A HOUSE NEAR LINDSAY AND CHANDLER HEIGHTS. TIME ESTIMATED BY RADAR. |
| Jul 9, 10:32 PM MST | TSTM WND GST 58 | 5 N Casa Grande, AZ | MEASURED BY KCGZ AWOS. |
| Jul 9, 10:35 PM MST | TSTM WND GST 63 | 3 Wnw Casa Grande, AZ | ***DELAYED REPORT***PEAK GUST AT SRP MESONET STATION DESERT BASIN. |
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, 5.1 hours before the alert went out and 48 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.
190
WUUS55 KPSR 100506
SVRPSR
AZC013-021-100545-
/O.NEW.KPSR.SV.W.0010.210710T0506Z-210710T0545Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Phoenix AZ
1006 PM MST Fri Jul 9 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 1045 PM MST.
* At 1006 PM MST, severe thunderstorms were located along a line
extending from near Apache Junction to near San Tan Valley to near
Florence, moving west at 55 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...
Phoenix, Mesa, Chandler, Gilbert, Tempe, Casa Grande, Apache
Junction, Florence, Coolidge, East Mesa, Gold Canyon, Sun Lakes,
Maricopa, Queen Creek and Gold Camp.
* This includes the following highways...
AZ Interstate 10 between mile markers 154 and 197.
AZ Interstate 8 between mile markers 156 and 176.
US Highway 60 between mile markers 173 and 212.
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 3297 11229 3336 11229 3349 11149 3310 11123
3278 11181 3279 11187 3277 11189 3277 11196
TIME...MOT...LOC 0506Z 071DEG 49KT 3335 11158 3323 11156 3312 11140
HAIL...0.88IN
WIND...70MPH
$$
SDB1 follow-up statement
567
WWUS55 KPSR 100536
SVSPSR
Severe Weather Statement
National Weather Service Phoenix AZ
1036 PM MST Fri Jul 9 2021
AZC013-021-100545-
/O.CON.KPSR.SV.W.0010.000000T0000Z-210710T0545Z/
Maricopa AZ-Pinal AZ-
1036 PM MST Fri Jul 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM MST
FOR MARICOPA AND PINAL COUNTIES...
At 1036 PM MST, severe thunderstorms were located along a line
extending from 6 miles southwest of Chandler Fashion Center Mall to
near Maricopa to near Casa Grande, moving west at 55 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Phoenix, Mesa, Chandler, Gilbert, Tempe, Casa Grande, Apache
Junction, Florence, Coolidge, Gold Canyon, Sun Lakes, East Mesa,
Maricopa, Queen Creek and South Phoenix.
This includes the following highways...
AZ Interstate 10 between mile markers 154 and 197.
AZ Interstate 8 between mile markers 156 and 176.
US Highway 60 between mile markers 173 and 207.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3297 11229 3336 11229 3348 11155 3310 11123
3278 11181 3279 11187 3277 11189 3277 11196
TIME...MOT...LOC 0536Z 068DEG 49KT 3325 11198 3306 11195 3293 11182
HAIL...<.75IN
WIND...70MPH
$$
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, 9:39 PM MST | Severe Thunderstorm Warning | PSR | Gila, Maricopa, Pinal | 36 min |
| Jul 9, 9:54 PM MST | Dust Storm Advisory | PSR | Maricopa, Pinal | 51 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.