Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 155, NWS Tucson, AZ

August 26, 2021Pinal County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 26, 2021, 2:43 PM MST for Pinal County, Arizona. It was in force for 47 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: Aug 26, 2021, 2:43 PM MST (21:43 UTC)
Expired: Aug 26, 2021, 3:30 PM MST
In force: 47 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Pinal County, AZ

The radar

The Tucson radar (KEMX), 96 km from the middle of the area, began a volume at 21:42 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 12:00Z, 9.7 hours before the alert went out and 66 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: 410 J/kg
Mixed-layer CIN: -282 J/kg
Mixed-layer LCL: 2554 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -18 m²/s²
0-3 km storm-relative helicity: -13 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

587 
WUUS55 KTWC 262143
SVRTWC
AZC021-262230-
/O.NEW.KTWC.SV.W.0155.210826T2143Z-210826T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
243 PM MST Thu Aug 26 2021

The National Weather Service in Tucson has issued a

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

* Until 330 PM MST.

* At 243 PM MST, a severe thunderstorm was located near Mammoth, and
  is nearly stationary.

  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...
  Mammoth.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3270 11084 3284 11081 3285 11058 3266 11062
TIME...MOT...LOC 2143Z 280DEG 2KT 3277 11073 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

AH

2 follow-up statements

331 
WWUS55 KTWC 262202
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
302 PM MST Thu Aug 26 2021

AZC021-262230-
/O.CON.KTWC.SV.W.0155.000000T0000Z-210826T2230Z/
Pinal-
302 PM MST Thu Aug 26 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM MST
FOR EAST CENTRAL PINAL COUNTY...

At 302 PM MST, a severe thunderstorm was located near Mammoth, and is
nearly stationary.

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...
Mammoth.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3270 11084 3284 11081 3285 11058 3266 11062
TIME...MOT...LOC 2202Z 035DEG 2KT 3276 11076 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

AH

473 
WWUS55 KTWC 262222
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
322 PM MST Thu Aug 26 2021

AZC021-262232-
/O.EXP.KTWC.SV.W.0155.000000T0000Z-210826T2230Z/
Pinal-
322 PM MST Thu Aug 26 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL PINAL COUNTY WILL
EXPIRE AT 330 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.

LAT...LON 3270 11084 3284 11081 3285 11058 3266 11062
TIME...MOT...LOC 2222Z 280DEG 2KT 3276 11075 

$$

AH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 26, 2:17 PM MST	Special Weather Statement	TWC		43 min
Aug 26, 2:46 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima	44 min
Aug 26, 2:49 PM MST	Special Weather Statement	TWC		41 min
Aug 26, 3:40 PM MST	Special Weather Statement	TWC	Pima	50 min
Aug 26, 3:45 PM MST	Areal Flood Advisory	TWC	Pima	3 hr
Aug 26, 4:01 PM MST	Severe Thunderstorm Warning	TWC	Pima	44 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.