Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 29, NWS Tucson, AZ

July 10, 2021Cochise County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 10, 2021, 3:43 PM MST for Cochise County, Arizona. It was in force for 19 min. 1 report 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, 3:43 PM MST (22:43 UTC)
Expired: Jul 10, 2021, 4:02 PM MST
In force: 19 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Cochise County, AZ

The radar

The Tucson radar (KEMX), 53 km from the middle of the area, began a volume at 22:46 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, 4:00 PM MST	HAIL 1	3 Se Sierra Vista, AZ	MOSTLY NICKEL SIZE HAIL WITH QUARTER SIZE HAIL.

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, 10.7 hours before the alert went out and 93 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.

743 
WUUS55 KTWC 102243
SVRTWC
AZC003-102315-
/O.NEW.KTWC.SV.W.0029.210710T2243Z-210710T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
343 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 415 PM MST.

* At 342 PM MST, a severe thunderstorm was located near Sierra Vista,
  and is tracking southwest 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...
  Sierra Vista, Huachuca City, Fort Huachuca and Charleston. 

This includes the following highways...
 Route 90 between mile markers 313 and 329.
 Route 92 between mile markers 322 and 329.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3166 11017 3146 11008 3143 11027 3163 11040
TIME...MOT...LOC 2242Z 073DEG 3KT 3157 11020 

HAIL...0.75IN
WIND...60MPH
 
$$

1 follow-up statement

942 
WWUS55 KTWC 102302
SVSTWC

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

AZC003-102310-
/O.CAN.KTWC.SV.W.0029.000000T0000Z-210710T2315Z/
Cochise-
402 PM MST Sat Jul 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN COCHISE COUNTY IS
CANCELLED...
        
The storm which prompted the warning has weakened below severe 
limits, and was exiting the warned area. Therefore, the warning has 
been cancelled.

LAT...LON 3166 11017 3146 11008 3143 11027 3163 11040
TIME...MOT...LOC 2248Z 073DEG 3KT 3157 11022 

$$

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, 4:03 PM MST	Special Weather Statement	TWC	Graham	42 min
Jul 10, 4:27 PM MST	Severe Thunderstorm Warning	TWC	Cochise	48 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.