Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 30, NWS Tucson, AZ

July 10, 2021Cochise County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 10, 2021, 4:27 PM MST for Cochise County, Arizona. It was in force for 48 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 10, 2021, 4:27 PM MST (23:27 UTC)
Expired: Jul 10, 2021, 5:15 PM MST
In force: 48 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), 59 km from the middle of the area, began a volume at 23:28 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.

What was reported inside it

Time	Report	Where	Remark
Jul 10, 5:01 PM MST	TSTM WND GST 60	2 Nw Sierra Vista, AZ	ASOS STATION KFHU LIBBY FIELD/SIERRA VISTA AIRPORT.
Jul 10, 5:04 PM MST	TSTM WND GST 70	Huachuca City, AZ	PRIVATE WEATHER STATION.
Jul 10, 5:24 PM MST	TSTM WND GST 91	6 Wsw Huachuca City, AZ	ASOS STATION KALK PIONEER AIRFIELD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Tuscon, AZ (KTUS), launched 12:00Z, 11.5 hours before the alert went out and 95 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: 1505 J/kg
Mixed-layer CIN: -302 J/kg
Mixed-layer LCL: 1767 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

918 
WUUS55 KTWC 102327
SVRTWC
AZC003-110015-
/O.NEW.KTWC.SV.W.0030.210710T2327Z-210711T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
427 PM MST Sat Jul 10 2021

The National Weather Service in Tucson has issued a

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

* Until 515 PM MST.

* At 426 PM MST, a cluster of strong to severe thunderstorms was 
  located from just west of Sierra Vista, extending northeast to 
  Charleston and Tombstone with the strong storm near Tombstone. 
  These storms are moving west at 20 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, Whetstone, Huachuca City, Tombstone, Fort Huachuca,
  Pearce-Sunsites, Fairbank and Charleston.

This includes the following highways...
 Route 80 between mile markers 309 and 328.
 Route 82 between mile markers 47 and 67.
 Route 90 between mile markers 306 and 330.
 Route 92 between mile markers 322 and 326.
 Route 191 between mile markers 44 and 47.

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 3194 10977 3171 10975 3139 11044 3171 11043
TIME...MOT...LOC 2326Z 068DEG 16KT 3168 11004 

HAIL...1.00IN
WIND...60MPH
 
$$

GL

1 follow-up statement

404 
WWUS55 KTWC 102346
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
446 PM MST Sat Jul 10 2021

AZC003-110015-
/O.CON.KTWC.SV.W.0030.000000T0000Z-210711T0015Z/
Cochise-
446 PM MST Sat Jul 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM MST
FOR SOUTHWESTERN COCHISE COUNTY...

At 445 PM MST, a cluster of strong to severe thunderstorms continues 
from Sierra Vista, extending northeast to Charleston and Tombstone.
These storms are moving west at 20 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, Whetstone, Huachuca City, Tombstone, Fort Huachuca,
Pearce-Sunsites, Fairbank and Charleston.

This includes the following highways...
 Route 80 between mile markers 309 and 328.
 Route 82 between mile markers 47 and 67.
 Route 90 between mile markers 306 and 330.
 Route 92 between mile markers 322 and 326.
 Route 191 between mile markers 44 and 47.

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 3194 10977 3171 10975 3139 11044 3171 11043
TIME...MOT...LOC 2345Z 068DEG 16KT 3165 11013 

HAIL...1.00IN
WIND...60MPH
 
$$

GL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 5:11 PM MST	Special Weather Statement	TWC		49 min
Jul 9, 6:09 PM MST	Severe Thunderstorm Warning	TWC	Pinal	26 min
Jul 9, 7:54 PM MST	Special Weather Statement	TWC	Graham	36 min
Jul 9, 8:17 PM MST	Severe Thunderstorm Warning	TWC	Graham	43 min
Jul 9, 10:16 PM MST	Special Weather Statement	TWC	Pinal	29 min
Jul 9, 10:55 PM MST	Special Weather Statement	TWC	Pima	35 min
Jul 10, 1:55 PM MST	Blowing Dust Advisory	TWC	Pima, Pinal	9 hr
Jul 10, 3:09 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	51 min
Jul 10, 3:18 PM MST	Special Weather Statement	TWC	Greenlee	42 min
Jul 10, 3:40 PM MST	Special Weather Statement	TWC		35 min
Jul 10, 3:43 PM MST	Severe Thunderstorm Warning	TWC	Cochise	19 min
Jul 10, 4:03 PM MST	Special Weather Statement	TWC	Graham	42 min
Jul 10, 4:32 PM MST	Severe Thunderstorm Warning	TWC	Graham	43 min
Jul 10, 4:39 PM MST	Special Weather Statement	TWC	Santa Cruz	51 min
Jul 10, 4:45 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	45 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.