Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 206, NWS Tucson, AZ

October 5, 2021Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Oct 5, 2021, 3:38 PM MST for Pima County, Arizona. It was in force for 52 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, 3:38 PM MST (22:38 UTC)
Expired: Oct 5, 2021, 4:30 PM MST
In force: 52 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Pima County, AZ

The radar

The Tucson radar (KEMX), 43 km from the middle of the area, began a volume at 22:38 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, 10.6 hours before the alert went out and 15 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: 4 J/kg
Mixed-layer CIN: -376 J/kg
Mixed-layer LCL: 2029 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 114 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

464 
WUUS55 KTWC 052238
SVRTWC
AZC019-052330-
/O.NEW.KTWC.SV.W.0206.211005T2238Z-211005T2330Z/

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

The National Weather Service in Tucson has issued a

* Severe Thunderstorm Warning for...
  Northeastern Pima County in southeastern Arizona...

* Until 430 PM MST.

* At 338 PM MST, a severe thunderstorm was located near and 
  southwest of Davis-Monthan Air Force Base, 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...
  Tucson, Catalina, Davis-Monthan Air Force Base, Tanque Verde, Mount
  Lemmon/Summerhaven, Sabino Canyon Recreation Area, Catalina
  Foothills, Tucson International Airport, Saguaro National Park
  East, Rita Ranch.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3211 11079 3212 11097 3249 11088 3245 11046
TIME...MOT...LOC 2238Z 208DEG 21KT 3221 11085 

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

$$

Meyer

2 follow-up statements

380 
WWUS55 KTWC 052300
SVSTWC

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

AZC019-052330-
/O.CON.KTWC.SV.W.0206.000000T0000Z-211005T2330Z/
Pima-
400 PM MST Tue Oct 5 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM MST
FOR NORTHEASTERN PIMA COUNTY...

At 357 PM MST, a severe thunderstorm was located near eastern and 
northeastern Tucson, moving northeast 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...
Tucson, Catalina, Tanque Verde, Mount Lemmon/Summerhaven, Sabino 
Canyon Recreation Area, Catalina Foothills, Saguaro National Park 
East, Seven Falls and Redington.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3211 11079 3212 11097 3249 11088 3245 11046
TIME...MOT...LOC 2257Z 207DEG 18KT 3226 11082 

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

$$

Meyer

574 
WWUS55 KTWC 052321
SVSTWC

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

AZC019-052330-
/O.EXP.KTWC.SV.W.0206.000000T0000Z-211005T2330Z/
Pima-
421 PM MST Tue Oct 5 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PIMA COUNTY WILL
EXPIRE AT 430 PM MST...
        
The storm which prompted the warning near eastern Tucson has 
weakened below severe limits, and has exited the warned area. 
Therefore, the warning will be allowed to expire.

LAT...LON 3211 11079 3212 11097 3249 11088 3245 11046
TIME...MOT...LOC 2320Z 208DEG 21KT 3234 11077 

$$

Meyer

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 5, 12:41 PM MST	Special Weather Statement	TWC	Cochise	49 min
Oct 5, 12:54 PM MST	Severe Thunderstorm Warning	TWC	Cochise	36 min
Oct 5, 1:27 PM MST	Severe Thunderstorm Warning	TWC	Cochise	48 min
Oct 5, 1:58 PM MST	Severe Thunderstorm Warning Considerable damage threat	TWC	Cochise, Graham	47 min
Oct 5, 2:48 PM MST	Severe Thunderstorm Warning	TWC	Cochise	42 min
Oct 5, 3:23 PM MST	Severe Thunderstorm Warning Considerable damage threat	TWC	Cochise	52 min
Oct 5, 3:32 PM MST	Special Weather Statement	TWC	Graham	58 min
Oct 5, 4:18 PM MST	Severe Thunderstorm Warning	TWC	Graham	30 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.