Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 9, NWS Tucson, AZ

July 2, 2021Pima County, Pinal County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 2, 2021, 3:01 PM MST for Pima County, Pinal County, Arizona. It was in force for 44 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 2, 2021, 3:01 PM MST (22:01 UTC)
Expired: Jul 2, 2021, 3:45 PM MST
In force: 44 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Pima County, AZ, Pinal County, AZ

The radar

The Tucson radar (KEMX), 74 km from the middle of the area, began a volume at 22:05 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, 10.0 hours before the alert went out and 38 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: 385 J/kg
Mixed-layer CIN: -127 J/kg
Mixed-layer LCL: 1652 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 75 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

873 
WUUS55 KTWC 022201
SVRTWC
AZC019-021-022245-
/O.NEW.KTWC.SV.W.0009.210702T2201Z-210702T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
301 PM MST Fri Jul 2 2021

The National Weather Service in Tucson has issued a

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

* Until 345 PM MST.

* At 301 PM MST, a severe thunderstorm was located over Catalina,
  moving west at 5 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...
  Catalina, Oro Valley, Marana, Saddlebrooke, Tortolita, Catalina
  State Park and Oracle Junction.

This includes the following highways...
 Route 77 between mile markers 82 and 93.
 Route 79 between mile markers 92 and 95.

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 3254 11082 3241 11085 3246 11107 3261 11099
TIME...MOT...LOC 2201Z 101DEG 5KT 3247 11086 

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

JRM

2 follow-up statements

374 
WWUS55 KTWC 022216
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
316 PM MST Fri Jul 2 2021

AZC019-021-022245-
/O.CON.KTWC.SV.W.0009.000000T0000Z-210702T2245Z/
Pima-Pinal-
316 PM MST Fri Jul 2 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM MST
FOR NORTHEASTERN PIMA AND SOUTHEASTERN PINAL COUNTIES...

At 315 PM MST, a severe thunderstorm was located over Catalina,
moving west at 5 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Catalina, Oro Valley, Marana, Saddlebrooke, Tortolita, Catalina State
Park and Oracle Junction.

This includes the following highways...
 Route 77 between mile markers 83 and 93.
 Route 79 between mile markers 92 and 95.

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 3256 11087 3242 11089 3246 11107 3261 11099
TIME...MOT...LOC 2215Z 101DEG 5KT 3247 11088 

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

JRM

617 
WWUS55 KTWC 022237
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
337 PM MST Fri Jul 2 2021

AZC019-021-022246-
/O.EXP.KTWC.SV.W.0009.000000T0000Z-210702T2245Z/
Pima-Pinal-
337 PM MST Fri Jul 2 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PIMA AND
SOUTHEASTERN PINAL COUNTIES WILL EXPIRE AT 345 PM MST...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

LAT...LON 3256 11087 3242 11089 3246 11107 3261 11099
TIME...MOT...LOC 2236Z 101DEG 5KT 3247 11091 

$$

JRM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 5:15 PM MST	Special Weather Statement	TWC	Cochise	45 min
Jul 2, 11:58 AM MST	Areal Flood Advisory	TWC	Cochise, Graham	3 hr
Jul 2, 12:46 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	3 hr
Jul 2, 1:34 PM MST	Special Weather Statement	TWC	Graham	26 min
Jul 2, 2:05 PM MST	Severe Thunderstorm Warning	TWC	Pinal	40 min
Jul 2, 2:27 PM MST	Special Weather Statement	TWC		33 min
Jul 2, 2:36 PM MST	Severe Thunderstorm Warning	TWC	Pinal	39 min
Jul 2, 2:48 PM MST	Severe Thunderstorm Warning	TWC	Pima	42 min
Jul 2, 2:53 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 2, 3:10 PM MST	Severe Thunderstorm Warning	TWC	Graham, Greenlee	50 min
Jul 2, 3:14 PM MST	Areal Flood Advisory	TWC	Pinal	3 hr
Jul 2, 3:24 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 2, 3:25 PM MST	Dust Storm Warning	TWC	Pima, Pinal	95 min
Jul 2, 3:33 PM MST	Severe Thunderstorm Warning	TWC	Cochise	42 min
Jul 2, 3:35 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	40 min
Jul 2, 3:54 PM MST	Special Weather Statement	TWC	Santa Cruz	51 min
Jul 2, 3:55 PM MST	Special Weather Statement	TWC	Graham	65 min
Jul 2, 4:06 PM MST	Severe Thunderstorm Warning	TWC	Cochise	39 min
Jul 2, 4:09 PM MST	Special Weather Statement	TWC	Graham	51 min
Jul 2, 4:24 PM MST	Special Weather Statement	TWC	Santa Cruz	36 min
Jul 2, 4:34 PM MST	Special Weather Statement	TWC	Santa Cruz	26 min
Jul 2, 4:35 PM MST	Special Weather Statement	TWC	Cochise	40 min
Jul 2, 4:46 PM MST	Special Weather Statement	TWC	Santa Cruz	29 min
Jul 2, 4:51 PM MST	Special Weather Statement	TWC	Pinal	24 min
Jul 2, 4:56 PM MST	Areal Flood Advisory	TWC	Santa Cruz	3 hr

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.