Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 194, NWS Tucson, AZ

September 7, 2021Cochise County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Sep 7, 2021, 7:56 PM MST for Cochise County, Arizona. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Sep 7, 2021, 7:56 PM MST (02:56 UTC)
Expired: Sep 7, 2021, 8:45 PM MST
In force: 49 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

County Cochise County, AZ

The radar

The Tucson radar (KEMX), 81 km from the middle of the area, began a volume at 02:57 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.

The nearest sounding before it

Tuscon, AZ (KTUS), launched 00:00Z, 2.9 hours before the alert went out and 120 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.

826 
WUUS55 KTWC 080256
SVRTWC
AZC003-080345-
/O.NEW.KTWC.SV.W.0194.210908T0256Z-210908T0345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
756 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 845 PM MST.

* At 756 PM MST, a severe thunderstorm was located near 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...
  Sierra Vista, Bisbee, Hereford, Naco and Palominas. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3151 10983 3134 10983 3133 11020 3146 11019
TIME...MOT...LOC 0256Z 083DEG 17KT 3140 10998 

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

$$

2 follow-up statements

097 
WWUS55 KTWC 080314
SVSTWC

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

AZC003-080345-
/O.CON.KTWC.SV.W.0194.000000T0000Z-210908T0345Z/
Cochise-
814 PM MST Tue Sep 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM MST
FOR SOUTH CENTRAL COCHISE COUNTY...

At 813 PM MST, a severe thunderstorm was located near Hereford, or 8
miles west 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...
Sierra Vista, Bisbee, Hereford, Naco and Palominas. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3151 10983 3134 10983 3133 11020 3146 11019
TIME...MOT...LOC 0313Z 085DEG 17KT 3142 11006 

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

$$

040 
WWUS55 KTWC 080343
SVSTWC

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

AZC003-080351-
/O.EXP.KTWC.SV.W.0194.000000T0000Z-210908T0345Z/
Cochise-
843 PM MST Tue Sep 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL COCHISE COUNTY
WILL EXPIRE AT 845 PM MST...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However small hail
and heavy rain are still possible with this thunderstorm.

LAT...LON 3151 10983 3134 10983 3133 11020 3146 11019
TIME...MOT...LOC 0341Z 089DEG 17KT 3144 11008 

$$

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, 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, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.