Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 184, NWS Tucson, AZ

September 5, 2021Cochise County, Graham County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Sep 5, 2021, 4:42 PM MST for Cochise County, Graham County, Arizona. It was in force for 63 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 5, 2021, 4:42 PM MST (23:42 UTC)
Expired
Sep 5, 2021, 5:45 PM MST
In force
63 min
Issued by
NWS Tucson, AZ
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Cochise County, AZ, Graham County, AZ

The radar

The Tucson radar (KEMX), 87 km from the middle of the area, began a volume at 23:44 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 12:00Z, 11.7 hours before the alert went out and 89 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-pSkew-T log-p diagram, Tuscon, AZ at 12:00Z on 2021-09-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1016 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tuscon, AZ at 12:00Z on 2021-09-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1016 J/kg
Mixed-layer CIN
-184 J/kg
Mixed-layer LCL
1856 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
20 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

909 
WUUS55 KTWC 052342
SVRTWC
AZC003-009-060045-
/O.NEW.KTWC.SV.W.0184.210905T2342Z-210906T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
442 PM MST Sun Sep 5 2021

The National Weather Service in Tucson has issued a

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

* Until 545 PM MST.

* At 441 PM MST, a severe thunderstorm was located 21 miles southwest
  of Roper Lake State Park, or 23 miles northwest of Willcox, moving
  southwest at 15 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...
  Bonita.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Tucson.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 3265 11007 3254 10975 3220 10991 3243 11035
TIME...MOT...LOC 2341Z 037DEG 11KT 3256 11000 

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

$$

JRM
3 follow-up statements
748 
WWUS55 KTWC 060003
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
503 PM MST Sun Sep 5 2021

AZC003-009-060045-
/O.CON.KTWC.SV.W.0184.000000T0000Z-210906T0045Z/
Graham-Cochise-
503 PM MST Sun Sep 5 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM MST
FOR SOUTH CENTRAL GRAHAM AND NORTH CENTRAL COCHISE COUNTIES...

At 503 PM MST, a severe thunderstorm was located 21 miles northwest
of Willcox, moving southwest 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.

This severe thunderstorm will remain over mainly remote areas of
south central Graham and north central Cochise Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Tucson.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3258 11009 3243 10980 3220 10991 3243 11035
TIME...MOT...LOC 0003Z 037DEG 10KT 3247 11010 

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

$$

JRM
223 
WWUS55 KTWC 060016 RRA
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
516 PM MST Sun Sep 5 2021

AZC003-009-060045-
/O.CON.KTWC.SV.W.0184.000000T0000Z-210906T0045Z/
Graham-Cochise-
516 PM MST Sun Sep 5 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM MST
FOR SOUTHERN GRAHAM AND NORTH CENTRAL COCHISE COUNTIES...

At 515 PM MST, a severe thunderstorm was located 20 miles west of
Willcox, moving southwest at 30 mph.

HAZARD...60 mph wind gusts and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

This severe thunderstorm will remain over mainly remote areas of
southern Graham and north central Cochise Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3252 11016 3234 10984 3220 10991 3243 11035
TIME...MOT...LOC 0015Z 039DEG 24KT 3235 11016 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...OBSERVED
MAX WIND GUST...60 MPH

$$

JRM
303 
WWUS55 KTWC 060035
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
535 PM MST Sun Sep 5 2021

AZC003-009-060045-
/O.EXP.KTWC.SV.W.0184.000000T0000Z-210906T0045Z/
Graham-Cochise-
535 PM MST Sun Sep 5 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN GRAHAM AND NORTH
CENTRAL COCHISE COUNTIES WILL EXPIRE AT 545 PM MST...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Tucson.

LAT...LON 3252 11016 3234 10984 3220 10991 3243 11035
TIME...MOT...LOC 0035Z 037DEG 11KT 3231 11019 

$$

JRM

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 5, 11:52 AM MSTSpecial Weather StatementTWCSanta Cruz23 min
Sep 5, 12:12 PM MSTSpecial Weather StatementTWCCochise33 min
Sep 5, 12:24 PM MSTSevere Thunderstorm WarningTWCCochise51 min
Sep 5, 12:37 PM MSTAreal Flood AdvisoryTWCCochise7 min
Sep 5, 12:44 PM MSTFlash Flood Warning Considerable damage threatTWCCochise106 min
Sep 5, 12:58 PM MSTSevere Thunderstorm WarningTWCCochise19 min
Sep 5, 1:02 PM MSTSevere Thunderstorm WarningTWCPima, Santa Cruz43 min
Sep 5, 1:26 PM MSTAreal Flood AdvisoryTWCSanta Cruz2 hr
Sep 5, 2:10 PM MSTSpecial Weather StatementTWCSanta Cruz50 min
Sep 5, 2:15 PM MSTSpecial Weather StatementTWCGraham45 min
Sep 5, 2:25 PM MSTSpecial Weather StatementTWCSanta Cruz50 min
Sep 5, 2:29 PM MSTSevere Thunderstorm WarningTWCGraham, Greenlee61 min
Sep 5, 2:31 PM MSTSevere Thunderstorm WarningTWCCochise, Pima44 min
Sep 5, 2:34 PM MSTSpecial Weather StatementTWCGraham41 min
Sep 5, 2:54 PM MSTAreal Flood AdvisoryTWCPima111 min
Sep 5, 3:08 PM MSTSevere Thunderstorm Warning Considerable damage threatTWCPima, Santa Cruz37 min
Sep 5, 3:13 PM MSTFlash Flood Warning Considerable damage threatTWCPima2 hr
Sep 5, 3:15 PM MSTTornado WarningTWCPima15 min
Sep 5, 3:22 PM MSTDust Storm WarningTWCPima113 min
Sep 5, 3:24 PM MSTSevere Thunderstorm WarningTWCGraham, Greenlee66 min
Sep 5, 3:37 PM MSTSevere Thunderstorm WarningTWCPima, Santa Cruz53 min
Sep 5, 3:40 PM MSTSevere Thunderstorm Warning Considerable damage threatTWCPima50 min
Sep 5, 3:41 PM MSTFlash Flood Warning Considerable damage threatTWCGraham2 hr
Sep 5, 3:52 PM MSTSevere Thunderstorm WarningTWCPima38 min
Sep 5, 3:55 PM MSTAreal Flood AdvisoryTWCPima2 hr
Sep 5, 4:00 PM MSTSevere Thunderstorm Warning Considerable damage threatTWCGraham45 min
Sep 5, 4:06 PM MSTAreal Flood AdvisoryTWCPima114 min
Sep 5, 4:12 PM MSTFlash Flood Warning Considerable damage threatTWCPima3 hr
Sep 5, 4:16 PM MSTSevere Thunderstorm Warning Considerable damage threatTWCPima59 min
Sep 5, 4:30 PM MSTSevere Thunderstorm WarningTWCPima45 min
Sep 5, 4:42 PM MSTDust Storm WarningTWCPima, Pinal93 min
Sep 5, 4:47 PM MSTSevere Thunderstorm WarningTWCPima, Pinal43 min
Sep 5, 4:48 PM MSTFlash Flood WarningTWCPima117 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2021Every 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.