Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 132, NWS Tucson, AZ

August 10, 2021Cochise County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 10, 2021, 12:55 PM MST for Cochise County, Arizona. It was in force for 50 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 10, 2021, 12:55 PM MST (19:55 UTC)
Expired: Aug 10, 2021, 1:45 PM MST
In force: 50 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), 64 km from the middle of the area, began a volume at 19:58 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 104 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: 1176 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 1330 m above ground
0-6 km bulk shear: 1 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 16 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

314 
WUUS55 KTWC 101955
SVRTWC
AZC003-102045-
/O.NEW.KTWC.SV.W.0132.210810T1955Z-210810T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
1255 PM MST Tue Aug 10 2021

The National Weather Service in Tucson has issued a

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

* Until 145 PM MST.

* At 1255 PM MST, a severe thunderstorm was located near Sierra
  Vista, moving northeast 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...
  Sierra Vista and Hereford. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3143 11016 3154 11026 3171 11004 3154 10990
TIME...MOT...LOC 1955Z 232DEG 10KT 3151 11016 

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

$$

AH

2 follow-up statements

493 
WWUS55 KTWC 102021
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
121 PM MST Tue Aug 10 2021

AZC003-102045-
/O.CON.KTWC.SV.W.0132.000000T0000Z-210810T2045Z/
Cochise-
121 PM MST Tue Aug 10 2021

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

At 121 PM MST, a severe thunderstorm was located 7 miles east of
Sierra Vista, moving east 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...
Sierra Vista and Hereford. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3143 11016 3154 11025 3171 11004 3154 10990
TIME...MOT...LOC 2021Z 255DEG 9KT 3151 11009 

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

$$

AH

107 
WWUS55 KTWC 102035
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
135 PM MST Tue Aug 10 2021

AZC003-102045-
/O.EXP.KTWC.SV.W.0132.000000T0000Z-210810T2045Z/
Cochise-
135 PM MST Tue Aug 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN COCHISE COUNTY
WILL EXPIRE AT 145 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 3143 11016 3154 11025 3171 11004 3154 10990
TIME...MOT...LOC 2035Z 232DEG 10KT 3153 11005 

$$

AH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 4:04 AM MST	Areal Flood Advisory	TWC	Pima, Pinal	3 hr
Aug 10, 4:44 AM MST	Special Weather Statement	TWC		46 min
Aug 10, 5:12 AM MST	Flash Flood Warning	TWC	Pima, Pinal	3 hr
Aug 10, 5:39 AM MST	Areal Flood Advisory	TWC	Pima, Pinal	111 min
Aug 10, 6:26 AM MST	Flash Flood Warning Considerable damage threat	TWC	Pima, Pinal	5 hr
Aug 10, 6:49 AM MST	Areal Flood Advisory	TWC	Cochise, Graham	116 min
Aug 10, 6:55 AM MST	Areal Flood Advisory	TWC	Cochise, Pima, Pinal	4 hr
Aug 10, 8:27 AM MST	Areal Flood Advisory	TWC	Graham, Greenlee	3 hr
Aug 10, 8:32 AM MST	Flash Flood Warning Considerable damage threat	TWC	Greenlee	3 hr
Aug 10, 9:11 AM MST	Areal Flood Advisory	TWC	Pima, Santa Cruz	3 hr
Aug 10, 10:51 AM MST	Areal Flood Warning	TWC	Pima, Pinal	18 hr
Aug 10, 11:00 AM MST	Areal Flood Advisory	TWC	Cochise, Pima, Pinal	2 hr
Aug 10, 11:09 AM MST	Areal Flood Advisory	TWC	Cochise, Graham	111 min
Aug 10, 11:41 AM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	3 hr
Aug 10, 12:52 PM MST	Special Weather Statement	TWC	Cochise	38 min
Aug 10, 1:38 PM MST	Special Weather Statement	TWC	Cochise	52 min
Aug 10, 1:43 PM MST	Areal Flood Advisory	TWC	Cochise	3 hr
Aug 10, 1:46 PM MST	Areal Flood Advisory	TWC	Cochise	119 min
Aug 10, 1:58 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	3 hr
Aug 10, 2:00 PM MST	Special Weather Statement	TWC		45 min
Aug 10, 2:08 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	2 hr
Aug 10, 2:39 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	3 hr
Aug 10, 3:41 PM MST	Special Weather Statement	TWC	Santa Cruz	34 min
Aug 10, 4:38 PM MST	Special Weather Statement	TWC	Santa Cruz	52 min
Aug 10, 4:39 PM MST	Special Weather Statement	TWC	Pima	36 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.