Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 116, NWS Tucson, AZ

August 6, 2021Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 6, 2021, 5:18 PM MST for Pima County, Arizona. It was in force for 42 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, 5:18 PM MST (00:18 UTC)
Expired: Aug 6, 2021, 6:00 PM MST
In force: 42 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Pima County, AZ

The radar

The Tucson radar (KEMX), 14 km from the middle of the area, began a volume at 00:20 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, 0.3 hours before the alert went out and 32 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: 1326 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 2589 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -28 m²/s²
0-3 km storm-relative helicity: -6 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

111 
WUUS55 KTWC 070018
SVRTWC
AZC019-070100-
/O.NEW.KTWC.SV.W.0116.210807T0018Z-210807T0100Z/

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

The National Weather Service in Tucson has issued a

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

* Until 600 PM MST.

* At 518 PM MST, a severe thunderstorm was located near Vail, or 17
  miles southeast of Davis-Monthan Air Force Base, 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...
  Tucson, Vail, Corona De Tucson, Saguaro National Park East and Rita
  Ranch.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3214 11049 3185 11047 3182 11079 3216 11079
TIME...MOT...LOC 0018Z 082DEG 5KT 3203 11062 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

RH

1 follow-up statement

070 
WWUS55 KTWC 070057
SVSTWC

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

AZC019-070107-
/O.EXP.KTWC.SV.W.0116.000000T0000Z-210807T0100Z/
Pima-
557 PM MST Fri Aug 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL PIMA COUNTY WILL
EXPIRE AT 600 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 3214 11049 3185 11047 3182 11079 3216 11079
TIME...MOT...LOC 0057Z 082DEG 5KT 3202 11068 

$$

RH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 5:01 PM MST	Severe Thunderstorm Warning	TWC	Pima	44 min
Aug 6, 5:02 PM MST	Special Weather Statement	TWC	Pima	43 min
Aug 6, 5:14 PM MST	Special Weather Statement	TWC	Greenlee	46 min
Aug 6, 5:27 PM MST	Areal Flood Advisory	TWC	Pima	2 hr
Aug 6, 5:28 PM MST	Areal Flood Advisory	TWC	Pima	2 hr
Aug 6, 5:29 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	46 min
Aug 6, 5:40 PM MST	Areal Flood Advisory	TWC	Pima	3 hr
Aug 6, 5:50 PM MST	Special Weather Statement	TWC	Graham	25 min
Aug 6, 6:00 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Aug 6, 6:02 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	58 min
Aug 6, 6:19 PM MST	Tornado Warning	TWC	Pima	26 min
Aug 6, 6:23 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima, Pinal	4 hr
Aug 6, 7:02 PM MST	Special Weather Statement	TWC		43 min
Aug 6, 9:25 PM MST	Areal Flood Warning	TWC	Pima	3 hr
Aug 7, 12:54 PM MST	Severe Thunderstorm Warning	TWC	Cochise	51 min
Aug 7, 1:41 PM MST	Severe Thunderstorm Warning	TWC	Cochise	49 min
Aug 7, 2:47 PM MST	Special Weather Statement	TWC	Cochise	28 min
Aug 7, 2:55 PM MST	Severe Thunderstorm Warning	TWC	Cochise	34 min
Aug 7, 3:09 PM MST	Areal Flood Advisory	TWC	Cochise	111 min
Aug 7, 3:17 PM MST	Severe Thunderstorm Warning	TWC	Cochise	43 min
Aug 7, 3:25 PM MST	Special Weather Statement	TWC	Greenlee	50 min
Aug 7, 3:53 PM MST	Special Weather Statement	TWC		52 min
Aug 7, 4:51 PM MST	Special Weather Statement	TWC	Pima	39 min
Aug 7, 4:57 PM MST	Special Weather Statement	TWC	Cochise	48 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.