Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 90, NWS Tucson, AZ

July 22, 2021Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 22, 2021, 5:42 PM MST for Pima County, Arizona. It was in force for 48 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 22, 2021, 5:42 PM MST (00:42 UTC)
Expired: Jul 22, 2021, 6:30 PM MST
In force: 48 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Pima County, AZ

The radar

The Phoenix radar (KIWA), 159 km from the middle of the area, began a volume at 00:44 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, 0.7 hours before the alert went out and 158 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: 2116 J/kg
Mixed-layer CIN: -88 J/kg
Mixed-layer LCL: 1822 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: -20 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

377 
WUUS55 KTWC 230042
SVRTWC
AZC019-230130-
/O.NEW.KTWC.SV.W.0090.210723T0042Z-210723T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
542 PM MST Thu Jul 22 2021

The National Weather Service in Tucson has issued a

* Severe Thunderstorm Warning for...
  Western Pima County in southeastern Arizona...

* Until 630 PM MST.

* At 542 PM MST, a severe thunderstorm was located over Gu Vo, or 30
  miles southeast of Ajo, 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...
  Gu Vo, Organ Pipe Cactus National Monument and Kuakatch. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3213 11245 3197 11248 3196 11277 3220 11273
TIME...MOT...LOC 0042Z 103DEG 5KT 3204 11253 

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

AH

2 follow-up statements

562 
WWUS55 KTWC 230103
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
603 PM MST Thu Jul 22 2021

AZC019-230130-
/O.CON.KTWC.SV.W.0090.000000T0000Z-210723T0130Z/
Pima-
603 PM MST Thu Jul 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM MST
FOR WESTERN PIMA COUNTY...

At 603 PM MST, a severe thunderstorm was located near Gu Vo, or 22
miles southeast of Ajo, moving west 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...
Gu Vo, Organ Pipe Cactus National Monument and Kuakatch. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3213 11245 3201 11250 3200 11276 3220 11273
TIME...MOT...LOC 0103Z 106DEG 11KT 3214 11260 

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

AH

755 
WWUS55 KTWC 230120
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
620 PM MST Thu Jul 22 2021

AZC019-230130-
/O.EXP.KTWC.SV.W.0090.000000T0000Z-210723T0130Z/
Pima-
620 PM MST Thu Jul 22 2021

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN PIMA COUNTY WILL
EXPIRE AT 630 PM MST...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

LAT...LON 3213 11245 3201 11250 3200 11276 3220 11273
TIME...MOT...LOC 0120Z 103DEG 5KT 3215 11263 

$$

AH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 5:36 PM MST	Special Weather Statement	TWC	Pinal	39 min
Jul 22, 5:44 PM MST	Special Weather Statement	TWC		46 min
Jul 22, 6:01 PM MST	Areal Flood Advisory	TWC	Pima	119 min
Jul 22, 6:19 PM MST	Special Weather Statement	TWC		26 min
Jul 22, 6:33 PM MST	Areal Flood Advisory	TWC	Cochise, Graham	3 hr
Jul 22, 6:37 PM MST	Special Weather Statement	TWC		38 min
Jul 22, 6:47 PM MST	Special Weather Statement	TWC		43 min
Jul 22, 6:57 PM MST	Areal Flood Advisory	TWC	Cochise	2 hr
Jul 22, 7:02 PM MST	Special Weather Statement	TWC	Graham	28 min
Jul 22, 7:05 PM MST	Areal Flood Advisory	TWC	Pinal	115 min
Jul 22, 7:21 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pinal	2 hr
Jul 22, 7:46 PM MST	Special Weather Statement	TWC	Graham	59 min
Jul 22, 7:58 PM MST	Areal Flood Advisory	TWC	Graham	3 hr
Jul 22, 8:11 PM MST	Special Weather Statement	TWC	Cochise	64 min
Jul 22, 8:21 PM MST	Severe Thunderstorm Warning	TWC	Cochise	39 min
Jul 22, 8:37 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise, Graham	3 hr
Jul 22, 8:41 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	2 hr
Jul 22, 9:15 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	3 hr
Jul 22, 9:54 PM MST	Areal Flood Advisory	TWC	Cochise	2 hr
Jul 22, 10:10 PM MST	Special Weather Statement	TWC	Santa Cruz	50 min
Jul 22, 10:15 PM MST	Areal Flood Advisory	TWC	Pima	2 hr
Jul 22, 10:18 PM MST	Areal Flood Advisory	TWC	Cochise, Pima, Santa Cruz	3 hr
Jul 22, 10:19 PM MST	Areal Flood Advisory	TWC	Pinal	116 min
Jul 22, 10:34 PM MST	Special Weather Statement	TWC	Cochise	56 min
Jul 22, 10:45 PM MST	Special Weather Statement	TWC		45 min
Jul 22, 10:49 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 22, 11:06 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pinal	3 hr
Jul 22, 11:44 PM MST	Flash Flood Warning Considerable damage threat	TWC	Graham	2 hr
Jul 22, 11:45 PM MST	Severe Thunderstorm Warning	TWC	Pima	60 min
Jul 22, 11:52 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise, Graham, Greenlee, Pima, Pinal, Santa Cruz	4 min
Jul 23, 12:07 AM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 23, 12:46 AM MST	Severe Thunderstorm Warning	TWC	Pima	44 min
Jul 23, 12:51 AM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 23, 2:13 AM MST	Areal Flood Warning	TWC	Pima	6 hr
Jul 23, 6:47 AM MST	Special Weather Statement	TWC	Pima	43 min
Jul 23, 9:06 AM MST	Areal Flood Warning	TWC	Pima, Pinal	12 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.