Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 42, NWS Tucson, AZ

July 10, 2021Cochise County, Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 10, 2021, 7:06 PM MST for Cochise County, Pima County, Arizona. It was in force for 39 min. 2 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, 7:06 PM MST (02:06 UTC)
Expired: Jul 10, 2021, 7:45 PM MST
In force: 39 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cochise County, AZ, Pima County, AZ

The radar

The Tucson radar (KEMX), 43 km from the middle of the area, began a volume at 02:09 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, 7:33 PM MST	TSTM WND GST 73	9 E Tucson, AZ	MESONET STATION CW6532 TUCSON FREEMAN/OLD SPANISH TRL.
Jul 10, 7:43 PM MST	TSTM WND GST 76	9 E Tucson, AZ	MESONET STATION CW6532 TUCSON FREEMAN/OLD SPANISH TRL.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 10, 4:52 PM MST	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Tuscon, AZ (KTUS), launched 00:00Z, 2.1 hours before the alert went out and 41 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: 1025 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 3304 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -32 m²/s²
0-3 km storm-relative helicity: 45 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

197 
WUUS55 KTWC 110206
SVRTWC
AZC003-019-110245-
/O.NEW.KTWC.SV.W.0042.210711T0206Z-210711T0245Z/

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

The National Weather Service in Tucson has issued a

* Severe Thunderstorm Warning for...
  East central Pima County in southeastern Arizona...
  Northwestern Cochise County in southeastern Arizona...

* Until 745 PM MST.

* At 705 PM MST, a severe thunderstorm was located 13 miles northeast
  of Saguaro National Park East, or 25 miles north of Benson, moving
  west at 25 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...
  Tucson, Tanque Verde, Saguaro National Park East and Cascabel. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3238 11026 3198 11035 3217 11079 3240 11072
TIME...MOT...LOC 0205Z 093DEG 27KT 3231 11045 

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

1 follow-up statement

689 
WWUS55 KTWC 110240
SVSTWC

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

AZC003-019-110248-
/O.EXP.KTWC.SV.W.0042.000000T0000Z-210711T0245Z/
Pima-Cochise-
740 PM MST Sat Jul 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL PIMA AND
NORTHWESTERN COCHISE COUNTIES WILL EXPIRE AT 745 PM MST...
  
The storms that prompted this warning had moved farther west and has 
been replaced with a new severe thunderstorm warning.   

Remember...a Severe Thunderstorm Watch remains in effect until 
midnight MST for southeastern Arizona.

LAT...LON 3238 11026 3198 11035 3217 11079 3240 11072
TIME...MOT...LOC 0238Z 093DEG 27KT 3232 11065 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 5:10 PM MST	Flash Flood Warning	TWC	Cochise	2 hr
Jul 10, 5:14 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham	61 min
Jul 10, 5:15 PM MST	Severe Thunderstorm Warning	TWC	Cochise	45 min
Jul 10, 5:23 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	52 min
Jul 10, 5:30 PM MST	Severe Thunderstorm Warning	TWC	Cochise	60 min
Jul 10, 5:42 PM MST	Flash Flood Warning	TWC	Santa Cruz	2 hr
Jul 10, 5:46 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima, Santa Cruz	59 min
Jul 10, 6:05 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	40 min
Jul 10, 6:13 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham	26 min
Jul 10, 6:22 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	53 min
Jul 10, 6:50 PM MST	Special Weather Statement	TWC		25 min
Jul 10, 6:57 PM MST	Dust Storm Warning	TWC	Pima, Santa Cruz	63 min
Jul 10, 6:57 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	48 min
Jul 10, 7:07 PM MST	Dust Storm Warning	TWC	Pima, Pinal	83 min
Jul 10, 7:14 PM MST	Severe Thunderstorm Warning	TWC	Pima	61 min
Jul 10, 7:29 PM MST	Flash Flood Warning	TWC	Cochise, Pima	2 hr
Jul 10, 7:35 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima	55 min
Jul 10, 8:00 PM MST	Dust Storm Warning	TWC	Pima, Pinal	86 min
Jul 10, 8:06 PM MST	Severe Thunderstorm Warning	TWC	Pima	39 min
Jul 10, 8:12 PM MST	Severe Thunderstorm Warning	TWC	Pima	48 min
Jul 10, 8:22 PM MST	Flash Flood Warning	TWC	Pima	113 min
Jul 10, 8:29 PM MST	Severe Thunderstorm Warning	TWC	Pima	61 min
Jul 10, 8:40 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	66 min
Jul 10, 8:41 PM MST	Flash Flood Warning	TWC	Pima	2 hr
Jul 10, 8:48 PM MST	Areal Flood Advisory	TWC	Pima	117 min
Jul 10, 8:51 PM MST	Areal Flood Advisory	TWC	Pima	114 min
Jul 10, 8:51 PM MST	Tornado Warning	TWC	Pima	14 min
Jul 10, 9:45 PM MST	Special Weather Statement	TWC		60 min
Jul 10, 10:03 PM MST	Severe Thunderstorm Warning	TWC	Pima	42 min
Jul 10, 10:20 PM MST	Areal Flood Advisory	TWC	Pima, Pinal	3 hr
Jul 10, 10:36 PM MST	Areal Flood Advisory	TWC	Pima	3 hr
Jul 11, 4:12 PM MST	Special Weather Statement	TWC	Greenlee	33 min
Jul 11, 4:44 PM MST	Special Weather Statement	TWC	Greenlee	46 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.