Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 88, NWS Tucson, AZ

July 22, 2021Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 22, 2021, 3:27 PM MST for Pima County, Arizona. It was in force for 27 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, 3:27 PM MST (22:27 UTC)
Expired: Jul 22, 2021, 3:54 PM MST
In force: 27 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 Tucson radar (KEMX), 89 km from the middle of the area, began a volume at 22:27 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, 10.5 hours before the alert went out and 53 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: 970 J/kg
Mixed-layer CIN: -227 J/kg
Mixed-layer LCL: 1720 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -25 m²/s²
0-3 km storm-relative helicity: -68 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

109 
WUUS55 KTWC 222227
SVRTWC
AZC019-222330-
/O.NEW.KTWC.SV.W.0088.210722T2227Z-210722T2330Z/

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

The National Weather Service in Tucson has issued a

* Severe Thunderstorm Warning for...
  North central Pima County in southeastern Arizona...

* Until 430 PM MST.

* At 327 PM MST, a severe thunderstorm was located 10 miles southwest
  of Avra Valley, or 17 miles southwest of Marana, 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...
  Avra Valley, Picture Rocks and Silver Bell. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3223 11126 3214 11154 3250 11171 3250 11141
TIME...MOT...LOC 2227Z 149DEG 11KT 3228 11141 

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

GL

1 follow-up statement

665 
WWUS55 KTWC 222254
SVSTWC

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

AZC019-222303-
/O.CAN.KTWC.SV.W.0088.000000T0000Z-210722T2330Z/
Pima-
354 PM MST Thu Jul 22 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL PIMA 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.  However gusty winds and
heavy rain are still possible with this thunderstorm.

LAT...LON 3223 11126 3214 11154 3250 11171 3250 11141
TIME...MOT...LOC 2248Z 149DEG 11KT 3235 11146 

$$

GL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 6:15 PM MST	Special Weather Statement	TWC	Santa Cruz	45 min
Jul 21, 6:35 PM MST	Special Weather Statement	TWC	Pima	55 min
Jul 21, 7:04 PM MST	Special Weather Statement	TWC	Pima	41 min
Jul 21, 9:02 PM MST	Special Weather Statement	TWC		43 min
Jul 22, 1:04 PM MST	Special Weather Statement	TWC	Santa Cruz	26 min
Jul 22, 1:37 PM MST	Severe Thunderstorm Warning	TWC	Pima	38 min
Jul 22, 2:34 PM MST	Special Weather Statement	TWC	Santa Cruz	26 min
Jul 22, 2:36 PM MST	Areal Flood Advisory	TWC	Graham, Pinal	3 hr
Jul 22, 2:43 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	47 min
Jul 22, 2:51 PM MST	Severe Thunderstorm Warning	TWC	Pima	39 min
Jul 22, 3:17 PM MST	Dust Storm Advisory	TWC	Pima, Pinal	58 min
Jul 22, 3:56 PM MST	Dust Storm Advisory	TWC	Pima, Pinal	34 min
Jul 22, 4:01 PM MST	Severe Thunderstorm Warning	TWC	Pima	59 min
Jul 22, 4:11 PM MST	Areal Flood Advisory	TWC	Pima	2 hr
Jul 22, 4:35 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	2 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.