Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 26, NWS Tucson, AZ

July 9, 2021Pinal County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 9, 2021, 6:09 PM MST for Pinal County, Arizona. It was in force for 26 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, 6:09 PM MST (01:09 UTC)
Expired: Jul 9, 2021, 6:35 PM MST
In force: 26 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), 99 km from the middle of the area, began a volume at 01:11 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, 1.2 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: 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.

698 
WUUS55 KTWC 100109
SVRTWC
AZC021-100200-
/O.NEW.KTWC.SV.W.0026.210710T0109Z-210710T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
609 PM MST Fri Jul 9 2021

The National Weather Service in Tucson has issued a

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

* Until 700 PM MST.

* At 609 PM MST, a severe thunderstorm was located near Mammoth,
  moving northwest at 10 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...
  Mammoth.

This includes Route 77 between mile markers 112 and 123.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3280 11046 3264 11057 3276 11081 3291 11063
TIME...MOT...LOC 0109Z 119DEG 7KT 3276 11060 

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

1 follow-up statement

238 
WWUS55 KTWC 100135
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
635 PM MST Fri Jul 9 2021

AZC021-100144-
/O.CAN.KTWC.SV.W.0026.000000T0000Z-210710T0200Z/
Pinal-
635 PM MST Fri Jul 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL PINAL COUNTY IS
CANCELLED...
                
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 has been cancelled.

LAT...LON 3280 11046 3264 11057 3276 11081 3291 11063
TIME...MOT...LOC 0130Z 119DEG 7KT 3278 11065 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 5:11 PM MST	Special Weather Statement	TWC		49 min
Jul 9, 7:54 PM MST	Special Weather Statement	TWC	Graham	36 min
Jul 9, 8:17 PM MST	Severe Thunderstorm Warning	TWC	Graham	43 min
Jul 9, 10:16 PM MST	Special Weather Statement	TWC	Pinal	29 min
Jul 9, 10:55 PM MST	Special Weather Statement	TWC	Pima	35 min
Jul 10, 1:55 PM MST	Blowing Dust Advisory	TWC	Pima, Pinal	9 hr
Jul 10, 3:09 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	51 min
Jul 10, 3:18 PM MST	Special Weather Statement	TWC	Greenlee	42 min
Jul 10, 3:40 PM MST	Special Weather Statement	TWC		35 min
Jul 10, 3:43 PM MST	Severe Thunderstorm Warning	TWC	Cochise	19 min
Jul 10, 4:03 PM MST	Special Weather Statement	TWC	Graham	42 min
Jul 10, 4:27 PM MST	Severe Thunderstorm Warning	TWC	Cochise	48 min
Jul 10, 4:32 PM MST	Severe Thunderstorm Warning	TWC	Graham	43 min
Jul 10, 4:39 PM MST	Special Weather Statement	TWC	Santa Cruz	51 min
Jul 10, 4:45 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	45 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.