Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 189, NWS Tucson, AZ

September 7, 2021Cochise County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Sep 7, 2021, 5:18 PM MST for Cochise County, Arizona. It was in force for 42 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: Sep 7, 2021, 5:18 PM MST (00:18 UTC)
Expired: Sep 7, 2021, 6:00 PM MST
In force: 42 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), 117 km from the middle of the area, began a volume at 00:19 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
Sep 7, 5:44 PM MST	HAIL 1	Douglas, AZ

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 00:00Z, 0.3 hours before the alert went out and 154 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: 2033 J/kg
Mixed-layer CIN: -116 J/kg
Mixed-layer LCL: 2247 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 32 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted.

251 
WUUS55 KTWC 080018
SVRTWC
AZC003-080100-
/O.NEW.KTWC.SV.W.0189.210908T0018Z-210908T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
518 PM MST Tue Sep 7 2021

The National Weather Service in Tucson has issued a

* Severe Thunderstorm Warning for...
  South central Cochise County in southeastern Arizona...

* Until 600 PM MST.

* At 518 PM MST, a severe thunderstorm was located 7 miles northeast
  of Douglas, moving west 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...
  Douglas, Bisbee-Douglas Airport and Pirtleville. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3153 10962 3148 10931 3133 10933 3134 10967
TIME...MOT...LOC 0018Z 098DEG 9KT 3140 10941 

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

$$

GL

1 follow-up statement

845 
WWUS55 KTWC 080036
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
536 PM MST Tue Sep 7 2021

AZC003-080100-
/O.CON.KTWC.SV.W.0189.000000T0000Z-210908T0100Z/
Cochise-
536 PM MST Tue Sep 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM MST
FOR SOUTH CENTRAL COCHISE COUNTY...

At 536 PM MST, a severe thunderstorm was located near Douglas, 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...
Douglas, Bisbee-Douglas Airport and Pirtleville. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3153 10962 3148 10938 3133 10939 3134 10967
TIME...MOT...LOC 0036Z 103DEG 15KT 3141 10951 

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

$$

GL

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 7, 5:13 PM MST	Special Weather Statement	TWC	Cochise	47 min
Sep 7, 5:53 PM MST	Severe Thunderstorm Warning	TWC	Cochise	67 min
Sep 7, 6:20 PM MST	Severe Thunderstorm Warning	TWC	Cochise	55 min
Sep 7, 6:43 PM MST	Severe Thunderstorm Warning	TWC	Cochise	32 min
Sep 7, 7:15 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Santa Cruz	25 min
Sep 7, 7:44 PM MST	Special Weather Statement	TWC	Cochise	46 min
Sep 7, 7:56 PM MST	Severe Thunderstorm Warning	TWC	Cochise	49 min
Sep 7, 8:47 PM MST	Special Weather Statement	TWC	Cochise	43 min
Sep 8, 4:45 PM MST	Special Weather Statement	TWC		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.