Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 196, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Sep 26, 2021, 1:40 PM MST for Pima County, Santa Cruz County, Arizona. It was in force for 50 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 26, 2021, 1:40 PM MST (20:40 UTC)
- Expired
- Sep 26, 2021, 2:30 PM MST
- In force
- 50 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Pima County, AZ, Santa Cruz County, AZ
The radar
The Tucson radar (KEMX), 40 km from the middle of the area, began a volume at 20:43 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, 8.7 hours before the alert went out and 62 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.
- Mixed-layer CAPE
- 252 J/kg
- Mixed-layer CIN
- -123 J/kg
- Mixed-layer LCL
- 1157 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
532
WUUS55 KTWC 262040
SVRTWC
AZC019-023-262130-
/O.NEW.KTWC.SV.W.0196.210926T2040Z-210926T2130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
140 PM MST Sun Sep 26 2021
The National Weather Service in Tucson has issued a
* Severe Thunderstorm Warning for...
Southeastern Pima County in southeastern Arizona...
Northeastern Santa Cruz County in southeastern Arizona...
* Until 230 PM MST.
* At 140 PM MST, a severe thunderstorm was located 7 miles south of
Green Valley, moving east 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...
Green Valley, Tubac, Patagonia, Sonoita, Patagonia Lake State Park,
Tumacacori, Amado, Madera Canyon and Arivaca Junction.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3142 11074 3156 11105 3167 11118 3179 11116
3189 11084 3152 11053
TIME...MOT...LOC 2040Z 254DEG 17KT 3174 11103
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
KRG2 follow-up statements
767
WWUS55 KTWC 262059
SVSTWC
Severe Weather Statement
National Weather Service Tucson AZ
159 PM MST Sun Sep 26 2021
AZC019-023-262130-
/O.CON.KTWC.SV.W.0196.000000T0000Z-210926T2130Z/
Pima-Santa Cruz-
159 PM MST Sun Sep 26 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM MST
FOR EAST CENTRAL PIMA AND NORTHEASTERN SANTA CRUZ COUNTIES...
At 158 PM MST, a severe thunderstorm was located 8 miles southeast of
Green Valley, moving east at 20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Green Valley, Tubac, Patagonia, Sonoita, Amado, Madera Canyon and
Arivaca Junction.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3145 11068 3154 11091 3155 11103 3156 11103
3166 11107 3179 11111 3189 11084 3152 11053
TIME...MOT...LOC 2058Z 254DEG 17KT 3176 11093
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
KRG225
WWUS55 KTWC 262125
SVSTWC
Severe Weather Statement
National Weather Service Tucson AZ
225 PM MST Sun Sep 26 2021
AZC019-023-262135-
/O.EXP.KTWC.SV.W.0196.000000T0000Z-210926T2130Z/
Pima-Santa Cruz-
225 PM MST Sun Sep 26 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL PIMA AND
NORTHEASTERN SANTA CRUZ COUNTIES WILL EXPIRE AT 230 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
is still possible with this thunderstorm.
LAT...LON 3145 11068 3154 11091 3155 11103 3156 11103
3166 11107 3179 11111 3189 11084 3152 11053
TIME...MOT...LOC 2125Z 254DEG 17KT 3179 11079
$$
KRGThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 25, 5:03 PM MST | Areal Flood Advisory | TWC | Cochise | 3 hr |
| Sep 25, 6:27 PM MST | Areal Flood Advisory | TWC | Cochise, Graham, Pima, Pinal | 3 hr |
| Sep 25, 6:46 PM MST | Flash Flood Warning | TWC | Pima, Pinal | 3 hr |
| Sep 25, 7:17 PM MST | Areal Flood Advisory | TWC | Pima | 3 hr |
| Sep 26, 11:51 AM MST | Special Weather Statement | TWC | Cochise | 39 min |
| Sep 26, 11:57 AM MST | Severe Thunderstorm Warning | TWC | Cochise | 28 min |
| Sep 26, 12:20 PM MST | Special Weather Statement | TWC | 40 min | |
| Sep 26, 12:44 PM MST | Special Weather Statement | TWC | Santa Cruz | 46 min |
| Sep 26, 12:58 PM MST | Special Weather Statement | TWC | Cochise | 47 min |
| Sep 26, 1:21 PM MST | Special Weather Statement | TWC | 39 min | |
| Sep 26, 2:18 PM MST | Special Weather Statement | TWC | Santa Cruz | 42 min |
| Sep 26, 2:33 PM MST | Areal Flood Advisory | TWC | Pima, Santa Cruz | 104 min |
| Sep 26, 2:56 PM MST | Severe Thunderstorm Warning | TWC | Pima | 49 min |
| Sep 26, 3:43 PM MST | Special Weather Statement | TWC | Santa Cruz | 47 min |
| Sep 26, 4:24 PM MST | Special Weather Statement | TWC | Pima | 51 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.