Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 15, NWS Phoenix, AZ

July 10, 2021Gila County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 10, 2021, 5:45 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 10, 2021, 5:45 PM MST (00:45 UTC)
Expired: Jul 10, 2021, 6:30 PM MST
In force: 45 min
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Gila County, AZ

The radar

The Flagstaff radar (KFSX), 115 km from the middle of the area, began a volume at 00:46 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 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, 0.8 hours before the alert went out and 139 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.

487 
WUUS55 KPSR 110045
SVRPSR
AZC007-110130-
/O.NEW.KPSR.SV.W.0015.210711T0045Z-210711T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Phoenix AZ
545 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...

* Until 630 PM MST.

* At 544 PM MST, a severe thunderstorm was located 14 miles north of
  Hilltop, or 35 miles northeast of Globe, 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...
  Hilltop and Sawmill. 

* This includes US Highway 60 between mile markers 265 and 298.
 
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 11050 3361 11081 3383 11062 3385 11056
      3382 11050 3383 11044 3383 11033 3378 11028
TIME...MOT...LOC 0044Z 033DEG 22KT 3383 11045 

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, 6:06 PM MST	Special Weather Statement	PSR	Gila	39 min
Jul 10, 6:24 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa, Pinal	36 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.