Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 5, NWS Tucson, AZ

June 29, 2021Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jun 29, 2021, 3:20 PM MST for Pima County, Arizona. It was in force for 40 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
Jun 29, 2021, 3:20 PM MST (22:20 UTC)
Expired
Jun 29, 2021, 4:00 PM MST
In force
40 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), 129 km from the middle of the area, began a volume at 22:21 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, 10.3 hours before the alert went out and 104 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 2021-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 133 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 2021-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 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
133 J/kg
Mixed-layer CIN
-378 J/kg
Mixed-layer LCL
1898 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
63 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

677 
WUUS55 KTWC 292220
SVRTWC
AZC019-292300-
/O.NEW.KTWC.SV.W.0005.210629T2220Z-210629T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
320 PM MST Tue Jun 29 2021

The National Weather Service in Tucson has issued a

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

* Until 400 PM MST.

* At 320 PM MST, a severe thunderstorm was located 7 miles northwest
  of Sells along Highway 86, moving south 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.

* Locations impacted include...
  Gu Oidak, No:ligk, Cababi, San Luis - Sells District and Rincon. 

This includes Route 86 between mile markers 99 and 111.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3216 11200 3210 11185 3185 11194 3195 11216
TIME...MOT...LOC 2220Z 016DEG 10KT 3200 11198 

HAIL...1.00IN
WIND...60MPH
 
$$
2 follow-up statements
683 
WWUS55 KTWC 292237
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
337 PM MST Tue Jun 29 2021

AZC019-292300-
/O.CON.KTWC.SV.W.0005.000000T0000Z-210629T2300Z/
Pima-
337 PM MST Tue Jun 29 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM MST
FOR CENTRAL PIMA COUNTY...

At 336 PM MST, a severe thunderstorm was located 7 miles northwest of
Sells, moving southwest at 5 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Gu Oidak, No:ligk, Cababi, San Luis - Sells District and Rincon. 

This includes Route 86 between mile markers 99 and 111.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3216 11200 3210 11185 3185 11194 3195 11216
TIME...MOT...LOC 2236Z 028DEG 5KT 3198 11199 

HAIL...<.75IN
WIND...60MPH
 
$$
910 
WWUS55 KTWC 292252
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
352 PM MST Tue Jun 29 2021

AZC019-292300-
/O.EXP.KTWC.SV.W.0005.000000T0000Z-210629T2300Z/
Pima-
352 PM MST Tue Jun 29 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL PIMA COUNTY WILL
EXPIRE AT 400 PM MST...
    
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning will be allowed to expire. However gusty 
winds are still possible with localized areas of blowing dust. 

LAT...LON 3216 11200 3210 11185 3185 11194 3195 11216
TIME...MOT...LOC 2250Z 016DEG 10KT 3196 11200 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 29, 2:23 PM MSTSpecial Weather StatementTWCPima37 min
Jun 29, 3:07 PM MSTSpecial Weather StatementTWCPima38 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.