Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 35, NWS Phoenix, AZ

July 22, 2021Pinal County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 22, 2021, 7:40 PM MST for Pinal County, Arizona. It was in force for 35 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: Jul 22, 2021, 7:40 PM MST (02:40 UTC)
Expired: Jul 22, 2021, 8:15 PM MST
In force: 35 min
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Pinal County, AZ

The radar

The Phoenix radar (KIWA), 54 km from the middle of the area, began a volume at 02:40 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.

The nearest sounding before it

Phoenix, AZ (KPSR), launched 00:00Z, 2.7 hours before the alert went out and 74 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1155 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 2803 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -25 m²/s²
0-3 km storm-relative helicity: -22 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

677 
WUUS55 KPSR 230240
SVRPSR
AZC021-230315-
/O.NEW.KPSR.SV.W.0035.210723T0240Z-210723T0315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Phoenix AZ
740 PM MST Thu Jul 22 2021

The National Weather Service in Phoenix has issued a

* Severe Thunderstorm Warning for...
  Pinal County in southeastern Arizona...

* Until 815 PM MST.

* At 740 PM MST, a severe thunderstorm was located over Toltec, or 7
  miles southeast of Casa Grande, and is nearly stationary.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Casa Grande, Arizona City, La Palma, Arizola, Randolph and Toltec. 

* This includes the following highways...
  AZ Interstate 10 between mile markers 192 and 204.
  AZ Interstate 8 between mile markers 170 and 178.
  AZ Route 87 between mile markers 124 and 128.

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 this storm. 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 3276 11174 3276 11177 3280 11178 3279 11185
      3293 11179 3292 11149 3287 11148 3274 11165
      3273 11174
TIME...MOT...LOC 0240Z 173DEG 4KT 3281 11166 

HAIL...0.75IN
WIND...60MPH
 
$$

Iniguez

1 follow-up statement

411 
WWUS55 KPSR 230307
SVSPSR

Severe Weather Statement
National Weather Service Phoenix AZ
807 PM MST Thu Jul 22 2021

AZC021-230317-
/O.EXP.KPSR.SV.W.0035.000000T0000Z-210723T0315Z/
Pinal AZ-
807 PM MST Thu Jul 22 2021

...THE SEVERE THUNDERSTORM WARNING FOR PINAL COUNTY WILL EXPIRE AT
815 PM MST...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses 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 this thunderstorm.

LAT...LON 3276 11174 3276 11177 3280 11178 3279 11185
      3293 11179 3292 11149 3287 11148 3274 11165
      3273 11174
TIME...MOT...LOC 0307Z 173DEG 4KT 3284 11166 

$$

Iniguez

The office that day

Everything else NWS Phoenix, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 22, 5:42 PM MST	Special Weather Statement	PSR		48 min
Jul 22, 6:11 PM MST	Areal Flood Advisory	PSR	Maricopa	39 min
Jul 22, 6:31 PM MST	Special Weather Statement	PSR		59 min
Jul 22, 6:50 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	6 hr
Jul 22, 7:19 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Jul 22, 7:29 PM MST	Special Weather Statement	PSR		61 min
Jul 22, 7:46 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	5 hr
Jul 22, 7:48 PM MST	Dust Storm Advisory	PSR	Maricopa, Pinal	27 min
Jul 22, 7:53 PM MST	Special Weather Statement	PSR	Pinal	37 min
Jul 22, 7:55 PM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	5 hr
Jul 22, 8:05 PM MST	Special Weather Statement	PSR	Maricopa	25 min
Jul 22, 8:06 PM MST	Flash Flood Warning Considerable damage threat	PSR	Pinal	4 hr
Jul 22, 8:15 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Jul 22, 8:19 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	26 min
Jul 22, 8:29 PM MST	Special Weather Statement	PSR	Pinal	61 min
Jul 22, 8:39 PM MST	Special Weather Statement	PSR	Maricopa	51 min
Jul 22, 8:52 PM MST	Flash Flood Warning	PSR	Maricopa	4 hr
Jul 22, 8:56 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Jul 22, 9:28 PM MST	Special Weather Statement	PSR	Maricopa	47 min
Jul 22, 9:40 PM MST	Flash Flood Warning	PSR	Maricopa	3 hr
Jul 22, 9:45 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	3 hr
Jul 22, 9:49 PM MST	Flash Flood Warning	PSR	Maricopa	4 hr
Jul 22, 9:54 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila, Maricopa	4 hr
Jul 22, 10:07 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila, Maricopa, Pinal	4 hr
Jul 22, 10:16 PM MST	Areal Flood Advisory	PSR	Pinal	3 hr
Jul 22, 10:57 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	113 min
Jul 22, 11:15 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	4 hr
Jul 22, 11:29 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	4 hr
Jul 22, 11:43 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	4 hr
Jul 23, 4:37 AM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Jul 23, 8:37 AM MST	Areal Flood Warning	PSR	Gila	4 days
Jul 23, 9:07 AM MST	Special Weather Statement	PSR		38 min
Jul 23, 9:30 AM MST	Special Weather Statement	PSR		30 min
Jul 23, 9:55 AM MST	Areal Flood Warning	PSR	Maricopa	6 hr
Jul 23, 9:58 AM MST	Special Weather Statement	PSR		32 min
Jul 23, 10:31 AM MST	Special Weather Statement	PSR		29 min
Jul 23, 10:53 AM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	4 hr
Jul 23, 11:11 AM MST	Special Weather Statement	PSR		34 min
Jul 23, 11:46 AM MST	Special Weather Statement	PSR		29 min
Jul 23, 12:02 PM MST	Special Weather Statement	PSR		28 min
Jul 23, 12:09 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	6 hr
Jul 23, 12:30 PM MST	Special Weather Statement	PSR		30 min
Jul 23, 12:53 PM MST	Special Weather Statement	PSR		37 min
Jul 23, 1:01 PM MST	Special Weather Statement	PSR		29 min
Jul 23, 1:11 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	5 hr
Jul 23, 1:34 PM MST	Special Weather Statement	PSR		26 min
Jul 23, 2:25 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	4 hr
Jul 23, 3:20 PM MST	Areal Flood Warning	PSR	Maricopa	9 hr
Jul 23, 4:00 PM MST	Areal Flood Warning	PSR	Maricopa	8 hr
Jul 23, 4:02 PM MST	Areal Flood Warning	PSR	Maricopa	8 hr

Nearby

Severe Thunderstorm Warnings in Arizona, 2021 Every 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.