Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 16, NWS Phoenix, AZ

July 10, 2021Gila County, Maricopa County, Pinal County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 10, 2021, 6:24 PM MST for Gila County, Maricopa County, Pinal County, Arizona. It was in force for 36 min. 2 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 10, 2021, 6:24 PM MST (01:24 UTC)
Expired: Jul 10, 2021, 7:00 PM MST
In force: 36 min
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Gila County, AZ, Maricopa County, AZ, Pinal County, AZ

The radar

The Phoenix radar (KIWA), 92 km from the middle of the area, began a volume at 01:26 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, 6:45 PM MST	TSTM WND DMG	4 Nne Globe, AZ	*DELAYED REPORT* SPOTTER REPORTS CEMENT TILES BLOWN OFF ROOF AND A BBQ, PROPANE TANK, AND HEAVY IRON TABLE BLOWN OVER. A GUST OF 61 MPH WAS MEASURED. TIME ESTIMATED BY RADAR.
Jul 10, 6:55 PM MST	TSTM WND GST 63	2 Sse Roosevelt, AZ	MESONET STATION AU919 2 SSE ROOSEVELT.

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, 1.4 hours before the alert went out and 119 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: 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

Open this sounding in Storm Lab

The text

As transmitted.

673 
WUUS55 KPSR 110124
SVRPSR
AZC007-013-021-110200-
/O.NEW.KPSR.SV.W.0016.210711T0124Z-210711T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Phoenix AZ
624 PM MST Sat Jul 10 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 700 PM MST.

* At 623 PM MST, severe thunderstorms were located along a line
  extending from 16 miles east of Tonto National Monument to near
  Hilltop to 12 miles east of San Carlos, moving southwest at 25 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...
  Globe, Roosevelt, San Carlos, Miami, Cutter, Roosevelt Dam,
  Top-Of-The-World, Claypool, Central Heights-Midland City, Tonto
  National Monument, Apache Lake, Inspiration and Roosevelt Estates.

* This includes the following highways...
  US Highway 60 between mile markers 232 and 277.
  AZ Route 70 between mile markers 253 and 271.
  AZ Route 77 near mile marker 147, and between mile markers 152 and
  170.

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.

If on or near Roosevelt Lake, get away from the water and move 
indoors or inside a vehicle. Remember, lightning can strike out to 
15 miles from the parent thunderstorm. If you can hear thunder, you 
are close enough to be struck by lightning. Move to safe shelter 
now!  Do not be caught on the water in a thunderstorm.

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

&&

LAT...LON 3338 11045 3329 11046 3320 11040 3319 11050
      3314 11059 3315 11063 3308 11070 3318 11088
      3355 11134 3378 11106 3374 11096 3364 11092
      3368 11084 3366 11078 3371 11073 3360 11048
      3344 11025
TIME...MOT...LOC 0123Z 036DEG 23KT 3370 11083 3357 11051 3340 11026 

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

SDB

The 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, 6:42 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 Considerable damage threat	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, 9:00 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	45 min
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, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.