Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 110, NWS Tucson, AZ

August 6, 2021Cochise County, Graham County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 6, 2021, 2:46 PM MST for Cochise County, Graham 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: Aug 6, 2021, 2:46 PM MST (21:46 UTC)
Expired: Aug 6, 2021, 3:30 PM MST
In force: 44 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Cochise County, AZ, Graham County, AZ

The radar

The Tucson radar (KEMX), 103 km from the middle of the area, began a volume at 21:47 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, 9.8 hours before the alert went out and 111 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.

710 
WUUS55 KTWC 062146
SVRTWC
AZC003-009-062230-
/O.NEW.KTWC.SV.W.0110.210806T2146Z-210806T2230Z/

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

The National Weather Service in Tucson has issued a

* Severe Thunderstorm Warning for...
  South central Graham County in southeastern Arizona...
  North central Cochise County in southeastern Arizona...

* Until 330 PM MST.

* At 246 PM MST, a severe thunderstorm was located 15 miles north of
  Willcox, and is nearly stationary.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will remain over mainly remote areas of
  south central Graham and north central Cochise Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3253 10965 3231 10971 3239 10998 3262 10989
TIME...MOT...LOC 2146Z 118DEG 4KT 3248 10983 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

RH

1 follow-up statement

466 
WWUS55 KTWC 062222
SVSTWC

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

AZC003-009-062232-
/O.EXP.KTWC.SV.W.0110.000000T0000Z-210806T2230Z/
Graham-Cochise-
322 PM MST Fri Aug 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL GRAHAM AND NORTH
CENTRAL COCHISE COUNTIES WILL EXPIRE AT 330 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 3253 10965 3231 10971 3239 10998 3262 10989
TIME...MOT...LOC 2222Z 118DEG 4KT 3250 10987 

$$

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, 2:51 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, 3:46 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	29 min
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.