Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 119, NWS Tucson, AZ

August 7, 2021Cochise County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 7, 2021, 12:54 PM MST for Cochise County, Arizona. It was in force for 51 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 7, 2021, 12:54 PM MST (19:54 UTC)
Expired: Aug 7, 2021, 1:45 PM MST
In force: 51 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Cochise County, AZ

The radar

The Tucson radar (KEMX), 137 km from the middle of the area, began a volume at 19:57 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, 7.9 hours before the alert went out and 171 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: 174 J/kg
Mixed-layer CIN: -334 J/kg
Mixed-layer LCL: 2050 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 38 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.

290 
WUUS55 KTWC 071954
SVRTWC
AZC003-072045-
/O.NEW.KTWC.SV.W.0119.210807T1954Z-210807T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
1254 PM MST Sat Aug 7 2021

The National Weather Service in Tucson has issued a

* Severe Thunderstorm Warning for...
  Southeastern Cochise County in southeastern Arizona...

* Until 145 PM MST.

* At 1253 PM MST, a severe thunderstorm was located 19 miles west of
  Cloverdale, or 22 miles northeast of Douglas, 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 Cochise County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3151 10935 3164 10931 3163 10909 3143 10912
TIME...MOT...LOC 1953Z 278DEG 4KT 3157 10924 

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

$$

JRM

2 follow-up statements

494 
WWUS55 KTWC 072013
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
113 PM MST Sat Aug 7 2021

AZC003-072045-
/O.CON.KTWC.SV.W.0119.000000T0000Z-210807T2045Z/
Cochise-
113 PM MST Sat Aug 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM MST
FOR SOUTHEASTERN COCHISE COUNTY...

At 111 PM MST, a severe thunderstorm was located 19 miles east of
Bisbee-Douglas Airport, or 19 miles northeast of Douglas, and is
nearly stationary. The storm is over Highway 80. 

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 Cochise County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3163 10931 3155 10915 3145 10918 3151 10935
TIME...MOT...LOC 2011Z 028DEG 3KT 3154 10929 

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

$$

JRM

227 
WWUS55 KTWC 072035
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
135 PM MST Sat Aug 7 2021

AZC003-072045-
/O.EXP.KTWC.SV.W.0119.000000T0000Z-210807T2045Z/
Cochise-
135 PM MST Sat Aug 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN COCHISE COUNTY
WILL EXPIRE AT 145 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. However gusty winds and heavy rain are still 
possible with this thunderstorm.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Tucson.

LAT...LON 3163 10931 3155 10915 3145 10918 3151 10935
TIME...MOT...LOC 2035Z 278DEG 4KT 3154 10926 

$$

JRM

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, 5:18 PM MST	Severe Thunderstorm Warning	TWC	Pima	42 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, 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.