Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 32, NWS Tucson, AZ

July 10, 2021Santa Cruz County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 10, 2021, 4:45 PM MST for Santa Cruz County, Arizona. It was in force for 45 min. 3 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, 4:45 PM MST (23:45 UTC)
Expired: Jul 10, 2021, 5:30 PM MST
In force: 45 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Santa Cruz County, AZ

The radar

The Tucson radar (KEMX), 40 km from the middle of the area, began a volume at 23:47 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, 5:07 PM MST	TSTM WND DMG	1 Sw Patagonia, AZ	REPORT FROM MPING: 1-INCH TREE LIMBS BROKEN; SHINGLES BLOWN OFF.
Jul 10, 5:16 PM MST	HAIL 1	3 Sw Patagonia, AZ	REPORT FROM MPING: QUARTER (1.00 IN.).
Jul 10, 5:22 PM MST	HAIL 1.01	3 Sw Patagonia, AZ	1.01 INCH HAIL.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Tuscon, AZ (KTUS), launched 12:00Z, 11.8 hours before the alert went out and 71 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: 1505 J/kg
Mixed-layer CIN: -302 J/kg
Mixed-layer LCL: 1767 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

666 
WUUS55 KTWC 102345
SVRTWC
AZC023-110030-
/O.NEW.KTWC.SV.W.0032.210710T2345Z-210711T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
445 PM MST Sat Jul 10 2021

The National Weather Service in Tucson has issued a

* Severe Thunderstorm Warning for...
  Central Santa Cruz County in southeastern Arizona...

* Until 530 PM MST.

* At 445 PM MST, a severe thunderstorm was located near Patagonia 
  Lake State Park, or 12 miles northeast of Nogales, moving west at 
  15 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...
  Patagonia and Patagonia Lake State Park. 

This includes Route 82 between mile markers 13 and 25.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3157 11062 3144 11067 3149 11096 3166 11086
TIME...MOT...LOC 2345Z 103DEG 12KT 3152 11082 

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

1 follow-up statement

587 
WWUS55 KTWC 110006
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
506 PM MST Sat Jul 10 2021

AZC023-110030-
/O.CON.KTWC.SV.W.0032.000000T0000Z-210711T0030Z/
Santa Cruz-
506 PM MST Sat Jul 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM MST
FOR CENTRAL SANTA CRUZ COUNTY...

At 506 PM MST, a severe thunderstorm was located over Patagonia Lake
State Park, or 12 miles northeast of Nogales, moving west at 10 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Patagonia and Patagonia Lake State Park. 

This includes Route 82 between mile markers 13 and 25.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3157 11062 3144 11067 3149 11096 3166 11086
TIME...MOT...LOC 0006Z 100DEG 8KT 3151 11082 

HAIL...1.25IN
WIND...60MPH
 
$$

GL

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, 6:09 PM MST	Severe Thunderstorm Warning	TWC	Pinal	26 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

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.