Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 61, NWS Tucson, AZ

July 13, 2021Pinal County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 13, 2021, 4:58 PM MST for Pinal County, Arizona. It was in force for 32 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 13, 2021, 4:58 PM MST (23:58 UTC)
Expired: Jul 13, 2021, 5:30 PM MST
In force: 32 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Pinal County, AZ

The radar

The Tucson radar (KEMX), 82 km from the middle of the area, began a volume at 00:05 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, 12.0 hours before the alert went out and 52 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: 36 J/kg
Mixed-layer CIN: -539 J/kg
Mixed-layer LCL: 2328 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 32 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

289 
WUUS55 KTWC 132358
SVRTWC
AZC021-140030-
/O.NEW.KTWC.SV.W.0061.210713T2358Z-210714T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
458 PM MST Tue Jul 13 2021

The National Weather Service in Tucson has issued a

* Severe Thunderstorm Warning for...
  Southeastern Pinal County in southeastern Arizona...

* Until 530 PM MST.

* At 457 PM MST, a severe thunderstorm was located over Oracle,
  moving west at 10 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Oracle, Saddlebrooke, Campo Bonito and Biosphere 2. 

This includes Route 77 between mile markers 92 and 110.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3269 11067 3252 11067 3252 11092 3269 11096
TIME...MOT...LOC 2357Z 087DEG 7KT 3260 11076 

HAIL...0.75IN
WIND...60MPH
 
$$

GL

2 follow-up statements

382 
WWUS55 KTWC 140019
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
519 PM MST Tue Jul 13 2021

AZC021-140030-
/O.CON.KTWC.SV.W.0061.000000T0000Z-210714T0030Z/
Pinal-
519 PM MST Tue Jul 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM MST
FOR SOUTHEASTERN PINAL COUNTY...

At 517 PM MST, a severe thunderstorm located just west of Oracle was 
moving toward Oracle Junction at 10 mph.

HAZARD...The storm is weakening a bit however 60 mph wind gusts are 
         still likely.

SOURCE...Radar indicated.

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

Locations impacted include...
Oracle, Saddlebrooke, Campo Bonito and Biosphere 2. 

This includes Route 77 between mile markers 92 and 110.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Frequent 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.

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

&&

LAT...LON 3269 11067 3252 11067 3252 11092 3269 11096
TIME...MOT...LOC 0017Z 087DEG 7KT 3260 11081 

HAIL...<.75IN
WIND...60MPH
 
$$

Cerniglia

021 
WWUS55 KTWC 140031
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
531 PM MST Tue Jul 13 2021

AZC021-140041-
/O.EXP.KTWC.SV.W.0061.000000T0000Z-210714T0030Z/
Pinal-
531 PM MST Tue Jul 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN PINAL COUNTY HAS
EXPIRED...
                
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 allowed to expire.

LAT...LON 3269 11067 3252 11067 3252 11092 3269 11096
TIME...MOT...LOC 0031Z 087DEG 7KT 3260 11084 

$$

Cerniglia

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 6:29 PM MST	Special Weather Statement	TWC	Graham	31 min
Jul 12, 6:39 PM MST	Special Weather Statement	TWC	Graham	36 min
Jul 12, 7:09 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima	36 min
Jul 12, 7:28 PM MST	Severe Thunderstorm Warning	TWC	Graham, Pinal	47 min
Jul 12, 7:45 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima, Santa Cruz	45 min
Jul 12, 7:49 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima	41 min
Jul 12, 7:50 PM MST	Special Weather Statement	TWC		40 min
Jul 12, 8:05 PM MST	Areal Flood Advisory	TWC	Graham	3 hr
Jul 12, 8:22 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	38 min
Jul 12, 8:37 PM MST	Severe Thunderstorm Warning	TWC	Pinal	38 min
Jul 12, 8:37 PM MST	Tornado Warning	TWC	Santa Cruz	23 min
Jul 12, 8:51 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	39 min
Jul 12, 9:11 PM MST	Special Weather Statement	TWC		34 min
Jul 12, 9:14 PM MST	Special Weather Statement	TWC	Pinal	31 min
Jul 12, 9:22 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima	38 min
Jul 12, 9:30 PM MST	Dust Storm Warning	TWC	Pima, Pinal	60 min
Jul 12, 9:32 PM MST	Special Weather Statement	TWC	Santa Cruz	43 min
Jul 12, 9:54 PM MST	Areal Flood Advisory	TWC	Cochise, Pima	3 hr
Jul 12, 9:58 PM MST	Special Weather Statement	TWC		47 min
Jul 12, 10:16 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima, Pinal	3 hr
Jul 12, 10:24 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 12, 10:33 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 12, 10:34 PM MST	Special Weather Statement	TWC	Santa Cruz	56 min
Jul 12, 11:17 PM MST	Special Weather Statement	TWC	Pima	28 min
Jul 13, 2:02 PM MST	Special Weather Statement	TWC	Cochise	43 min
Jul 13, 2:57 PM MST	Special Weather Statement	TWC	Santa Cruz	33 min
Jul 13, 3:02 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima, Santa Cruz	43 min
Jul 13, 3:21 PM MST	Areal Flood Advisory	TWC	Pima, Santa Cruz	2 hr
Jul 13, 3:45 PM MST	Special Weather Statement	TWC	Santa Cruz	45 min
Jul 13, 4:15 PM MST	Special Weather Statement	TWC	Santa Cruz	45 min
Jul 13, 4:20 PM MST	Special Weather Statement	TWC		25 min
Jul 13, 4:38 PM MST	Areal Flood Advisory	TWC	Pima, Pinal	3 hr
Jul 13, 4:44 PM MST	Special Weather Statement	TWC	Cochise	46 min
Jul 13, 4:45 PM MST	Special Weather Statement	TWC		30 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.