Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 7, NWS Phoenix, AZ

July 9, 2021Gila County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 9, 2021, 8:15 PM MST for Gila County, Arizona. It was in force for 45 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 9, 2021, 8:15 PM MST (03:15 UTC)
Expired
Jul 9, 2021, 9:00 PM MST
In force
45 min
Issued by
NWS Phoenix, AZ
Area
Storm-based polygon
Hail
0.88 in
Wind
60.0 mph

County Gila County, AZ

The radar

The Phoenix radar (KIWA), 117 km from the middle of the area, began a volume at 03:17 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

Tuscon, AZ (KTUS), launched 00:00Z, 3.3 hours before the alert went out and 144 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-pSkew-T log-p diagram, Tuscon, AZ at 00:00Z on 2021-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 902 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tuscon, AZ at 00:00Z on 2021-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -11 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
902 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
3170 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
-11 m²/s²
0-3 km storm-relative helicity
31 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

As transmitted.

119 
WUUS55 KPSR 100315
SVRPSR
AZC007-100400-
/O.NEW.KPSR.SV.W.0007.210710T0315Z-210710T0400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Phoenix AZ
815 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...

* Until 900 PM MST.

* At 815 PM MST, a severe thunderstorm was located 8 miles northeast
  of San Carlos, or 26 miles east of Globe, moving southwest at 15
  mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  San Carlos, Cutter, Hilltop, Sawmill and San Carlos Reservoir. 

* This includes the following highways...
  US Highway 60 between mile markers 258 and 267.
  AZ Route 70 between mile markers 259 and 271.

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.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3344 11032 3342 11035 3340 11035 3340 11041
      3338 11045 3329 11046 3320 11040 3317 11056
      3355 11077 3366 11039 3344 11025
TIME...MOT...LOC 0315Z 065DEG 13KT 3340 11033 

HAIL...0.88IN
WIND...60MPH
 
$$

SDB
1 follow-up statement
353 
WWUS55 KPSR 100337
SVSPSR

Severe Weather Statement
National Weather Service Phoenix AZ
837 PM MST Fri Jul 9 2021

AZC007-100400-
/O.CON.KPSR.SV.W.0007.000000T0000Z-210710T0400Z/
Gila AZ-
837 PM MST Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM MST
FOR GILA COUNTY...

At 836 PM MST, severe thunderstorms were located along a line
extending from near San Carlos to 10 miles west of Hilltop, moving
west at 20 mph.

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

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
San Carlos, Cutter and San Carlos Reservoir. 

This includes the following highways...
US Highway 60 between mile markers 258 and 267.
AZ Route 70 between mile markers 259 and 271.

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 11041 3338 11045 3329 11046 3320 11040
      3317 11056 3355 11077 3364 11045 3342 11035
      3340 11035
TIME...MOT...LOC 0336Z 077DEG 16KT 3328 11046 3358 11059 

HAIL...1.00IN
WIND...60MPH
 
$$

SDB

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 9, 5:36 PM MSTFlash Flood Warning Considerable damage threatPSRGila6 hr
Jul 9, 5:36 PM MSTSpecial Weather StatementPSRGila24 min
Jul 9, 6:23 PM MSTSpecial Weather StatementPSR52 min
Jul 9, 7:45 PM MSTSpecial Weather StatementPSR30 min
Jul 9, 8:58 PM MSTSevere Thunderstorm WarningPSRGila, Maricopa, Pinal47 min
Jul 9, 9:18 PM MSTFlash Flood Warning Considerable damage threatPSRGila4 hr
Jul 9, 9:18 PM MSTSpecial Weather StatementPSRPinal42 min
Jul 9, 9:32 PM MSTFlash Flood Warning Considerable damage threatPSRGila, Pinal4 hr
Jul 9, 9:39 PM MSTSevere Thunderstorm WarningPSRGila, Maricopa, Pinal36 min
Jul 9, 9:54 PM MSTDust Storm AdvisoryPSRMaricopa, Pinal51 min
Jul 9, 10:06 PM MSTSevere Thunderstorm WarningPSRMaricopa, Pinal39 min
Jul 9, 10:21 PM MSTDust Storm WarningPSRMaricopa, Pinal54 min
Jul 9, 10:30 PM MSTSevere Thunderstorm WarningPSRMaricopa, Pinal45 min
Jul 9, 10:32 PM MSTFlash Flood Warning Considerable damage threatPSRPinal4 hr
Jul 9, 10:44 PM MSTSevere Thunderstorm WarningPSRMaricopa, Pinal31 min
Jul 9, 10:52 PM MSTAreal Flood AdvisoryPSRMaricopa, Pinal3 hr
Jul 9, 11:12 PM MSTDust Storm AdvisoryPSRMaricopa63 min
Jul 9, 11:15 PM MSTDust Storm WarningPSRMaricopa, Pinal60 min
Jul 9, 11:19 PM MSTSevere Thunderstorm WarningPSRPinal26 min
Jul 9, 11:22 PM MSTSevere Thunderstorm WarningPSRMaricopa, Pinal38 min
Jul 9, 11:31 PM MSTDust Storm AdvisoryPSRMaricopa44 min
Jul 9, 11:33 PM MSTFlash Flood Warning Considerable damage threatPSRMaricopa, Pinal4 hr
Jul 10, 1:02 AM MSTSpecial Weather StatementPSRYuma28 min
Jul 10, 1:57 PM MSTBlowing Dust AdvisoryPSRMaricopa, Pinal9 hr
Jul 10, 2:27 PM MSTSpecial Weather StatementPSRGila48 min
Jul 10, 3:15 PM MSTSpecial Weather StatementPSRGila45 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.