Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 190, NWS Tucson, AZ

September 7, 2021Cochise County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Sep 7, 2021, 5:53 PM MST for Cochise County, Arizona. It was in force for 67 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: Sep 7, 2021, 5:53 PM MST (00:53 UTC)
Expired: Sep 7, 2021, 7:00 PM MST
In force: 67 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Cochise County, AZ

The radar

The Tucson radar (KEMX), 93 km from the middle of the area, began a volume at 00:53 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, 5:57 PM MST	HAIL 1.75	9 Nw Pirtleville, AZ
Sep 7, 5:57 PM MST	HAIL 1.75	9 Nw Pirtleville, AZ	CORRECTS PREVIOUS HAIL REPORT FROM 9 NW PIRTLEVILLE.

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, 0.9 hours before the alert went out and 132 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.

950 
WUUS55 KTWC 080053
SVRTWC
AZC003-080200-
/O.NEW.KTWC.SV.W.0190.210908T0053Z-210908T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
553 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 700 PM MST.

* At 553 PM MST, a severe thunderstorm was located near
  Bisbee-Douglas Airport, or 9 miles northwest of Douglas, moving
  west at 20 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Bisbee, Naco, 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 3133 11002 3160 10997 3150 10952 3133 10957
TIME...MOT...LOC 0053Z 102DEG 19KT 3144 10965 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

GL

3 follow-up statements

071 
WWUS55 KTWC 080104
SVSTWC

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

AZC003-080200-
/O.CON.KTWC.SV.W.0190.000000T0000Z-210908T0200Z/
Cochise-
604 PM MST Tue Sep 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM MST
FOR SOUTH CENTRAL COCHISE COUNTY...

At 602 PM MST, a severe thunderstorm was located near Bisbee-Douglas 
Airport, or 12 miles northwest of Douglas, moving west at 20 mph. At 
557 PM MST...a trained weather spotter reported golfball sized hail 
2 miles west of the Bisbee-Douglas Airport.

HAZARD...Golf ball size hail.

SOURCE...Trained weather spotters.

IMPACT...People and animals outdoors will be injured. Expect damage 
         to roofs, siding, windows, and vehicles.

Locations impacted include...
Bisbee, Naco, 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 3133 11002 3160 10997 3150 10952 3133 10957
TIME...MOT...LOC 0102Z 102DEG 19KT 3145 10971 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

416 
WWUS55 KTWC 080118
SVSTWC

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

AZC003-080200-
/O.CON.KTWC.SV.W.0190.000000T0000Z-210908T0200Z/
Cochise-
618 PM MST Tue Sep 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM MST
FOR SOUTH CENTRAL COCHISE COUNTY...

At 617 PM MST, a severe thunderstorm was located 7 miles northeast of
Bisbee, moving west at 20 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Bisbee and Naco. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

LAT...LON 3133 11002 3160 10997 3154 10973 3133 10976
TIME...MOT...LOC 0117Z 102DEG 19KT 3147 10980 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

GL

522 
WWUS55 KTWC 080138
SVSTWC

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

AZC003-080200-
/O.CON.KTWC.SV.W.0190.000000T0000Z-210908T0200Z/
Cochise-
638 PM MST Tue Sep 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM MST
FOR SOUTH CENTRAL COCHISE COUNTY...

At 637 PM MST, a severe thunderstorm was located near Bisbee, moving
west at 25 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Bisbee and Naco. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

LAT...LON 3157 10998 3153 10986 3133 10988 3133 11002
TIME...MOT...LOC 0137Z 098DEG 23KT 3145 10999 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 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, 5:18 PM MST	Severe Thunderstorm Warning	TWC	Cochise	42 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.