Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 113, NWS Tucson, AZ

August 6, 2021Pima County, Santa Cruz County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 6, 2021, 3:46 PM MST for Pima County, Santa Cruz County, Arizona. It was in force for 29 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: Aug 6, 2021, 3:46 PM MST (22:46 UTC)
Expired: Aug 6, 2021, 4:15 PM MST
In force: 29 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Pima County, AZ, Santa Cruz County, AZ

The radar

The Tucson radar (KEMX), 55 km from the middle of the area, began a volume at 22:46 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, 10.8 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: 1100 J/kg
Mixed-layer CIN: -195 J/kg
Mixed-layer LCL: 1879 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: -10 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

565 
WUUS55 KTWC 062246
SVRTWC
AZC019-023-062315-
/O.NEW.KTWC.SV.W.0113.210806T2246Z-210806T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
346 PM MST Fri Aug 6 2021

The National Weather Service in Tucson has issued a

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

* Until 415 PM MST.

* At 345 PM MST, a severe thunderstorm was located 11 miles northwest
  of Tubac, and is nearly stationary.

  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.

* This severe thunderstorm will remain over mainly remote areas of
  southeastern Pima and north central Santa Cruz Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3185 11109 3165 11109 3161 11133 3186 11134
TIME...MOT...LOC 2245Z 082DEG 3KT 3174 11118 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

RH

1 follow-up statement

301 
WWUS55 KTWC 062314
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
414 PM MST Fri Aug 6 2021

AZC019-023-062324-
/O.EXP.KTWC.SV.W.0113.000000T0000Z-210806T2315Z/
Pima-Santa Cruz-
414 PM MST Fri Aug 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN PIMA AND NORTH
CENTRAL SANTA CRUZ COUNTIES WILL EXPIRE AT 415 PM MST...
                
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 will be allowed to expire.

LAT...LON 3185 11109 3165 11109 3161 11133 3186 11134
TIME...MOT...LOC 2314Z 082DEG 3KT 3174 11121 

$$

RH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 5:21 PM MST	Special Weather Statement	TWC	Pima	39 min
Aug 6, 12:52 PM MST	Special Weather Statement	TWC	Santa Cruz	38 min
Aug 6, 1:16 PM MST	Areal Flood Advisory	TWC	Cochise, Santa Cruz	3 hr
Aug 6, 1:26 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	34 min
Aug 6, 1:58 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	47 min
Aug 6, 2:05 PM MST	Areal Flood Advisory	TWC	Santa Cruz	115 min
Aug 6, 2:29 PM MST	Severe Thunderstorm Warning	TWC	Cochise	31 min
Aug 6, 2:36 PM MST	Special Weather Statement	TWC	Pima	24 min
Aug 6, 2:43 PM MST	Areal Flood Advisory	TWC	Graham	2 hr
Aug 6, 2:46 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham	44 min
Aug 6, 2:51 PM MST	Special Weather Statement	TWC	Santa Cruz	24 min
Aug 6, 2:57 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	33 min
Aug 6, 3:00 PM MST	Areal Flood Advisory	TWC	Santa Cruz	2 hr
Aug 6, 3:10 PM MST	Flash Flood Warning Considerable damage threat	TWC	Santa Cruz	3 hr
Aug 6, 3:16 PM MST	Areal Flood Advisory	TWC	Pima	119 min
Aug 6, 3:26 PM MST	Areal Flood Advisory	TWC	Pima	2 hr
Aug 6, 3:31 PM MST	Severe Thunderstorm Warning	TWC	Cochise	29 min
Aug 6, 3:40 PM MST	Areal Flood Advisory	TWC	Cochise	3 hr
Aug 6, 3:57 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima, Santa Cruz	4 hr
Aug 6, 3:59 PM MST	Severe Thunderstorm Warning	TWC	Cochise	46 min
Aug 6, 4:12 PM MST	Areal Flood Advisory	TWC	Pima	2 hr
Aug 6, 4:19 PM MST	Areal Flood Advisory	TWC	Cochise	116 min
Aug 6, 4:55 PM MST	Areal Flood Advisory	TWC	Pima	2 hr
Aug 6, 4:58 PM MST	Special Weather Statement	TWC	Pima	32 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.