Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 211, NWS Tucson, AZ

October 5, 2021Graham County, Greenlee County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Oct 5, 2021, 6:11 PM MST for Graham County, Greenlee County, Arizona. It was in force for 48 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: Oct 5, 2021, 6:11 PM MST (01:11 UTC)
Expired: Oct 5, 2021, 6:59 PM MST
In force: 48 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Graham County, AZ, Greenlee County, AZ

The radar

The Tucson radar (KEMX), 151 km from the middle of the area, began a volume at 01:14 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 watch it was issued in

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

Issued	Product	Office	Lasted
Oct 5, 11:46 AM MST	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Tuscon, AZ (KTUS), launched 00:00Z, 1.2 hours before the alert went out and 161 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: 364 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 2251 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

681 
WUUS55 KTWC 060111
SVRTWC
AZC009-011-060215-
/O.NEW.KTWC.SV.W.0211.211006T0111Z-211006T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
611 PM MST Tue Oct 5 2021

The National Weather Service in Tucson has issued a

* Severe Thunderstorm Warning for...
  Southeastern Graham County in southeastern Arizona...
  Southeastern Greenlee County in southeastern Arizona...

* Until 715 PM MST.

* At 611 PM MST, a severe thunderstorm was located 17 miles north of
  Bowie, or 24 miles southeast of Safford, moving northeast 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...
  Duncan, York and Franklin. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3246 10940 3260 10961 3291 10919 3272 10904
      3267 10905
TIME...MOT...LOC 0111Z 225DEG 24KT 3258 10943 

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

$$

GL

2 follow-up statements

440 
WWUS55 KTWC 060150
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
650 PM MST Tue Oct 5 2021

AZC009-011-060215-
/O.CON.KTWC.SV.W.0211.000000T0000Z-211006T0215Z/
Graham-Greenlee-
650 PM MST Tue Oct 5 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM MST
FOR SOUTHEASTERN GRAHAM AND SOUTHEASTERN GREENLEE COUNTIES...

At 649 PM MST, a severe thunderstorm was located 14 miles southeast
of Solomon, or 18 miles southeast of Safford, moving north at 30 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Duncan, York and Franklin. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3246 10940 3260 10961 3291 10919 3272 10904
      3267 10905
TIME...MOT...LOC 0149Z 201DEG 28KT 3269 10943 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

GL

288 
WWUS55 KTWC 060159
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
659 PM MST Tue Oct 5 2021

AZC009-011-060209-
/O.CAN.KTWC.SV.W.0211.000000T0000Z-211006T0215Z/
Graham-Greenlee-
659 PM MST Tue Oct 5 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN GRAHAM AND
SOUTHEASTERN GREENLEE COUNTIES IS CANCELLED...
                
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 has been cancelled.  However gusty winds and
heavy rain are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 800 PM MST for
southeastern Arizona.

LAT...LON 3246 10940 3260 10961 3291 10919 3272 10904
      3267 10905
TIME...MOT...LOC 0152Z 225DEG 24KT 3274 10937 

$$

GL

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 5, 5:06 PM MST	Severe Thunderstorm Warning	TWC	Graham, Pinal	35 min
Oct 5, 5:18 PM MST	Severe Thunderstorm Warning	TWC	Cochise	27 min
Oct 5, 5:26 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham	49 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.