Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 200, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Sep 30, 2021, 12:40 AM MST for Pinal 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 30, 2021, 12:40 AM MST (07:40 UTC)
- Expired
- Sep 30, 2021, 1:30 AM MST
- In force
- 50 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Pinal County, AZ
The radar
The Phoenix radar (KIWA), 92 km from the middle of the area, began a volume at 07:41 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 00:00Z, 7.7 hours before the alert went out and 103 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
- 314 J/kg
- Mixed-layer CIN
- -91 J/kg
- Mixed-layer LCL
- 2898 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
759
WUUS55 KTWC 300740
SVRTWC
AZC021-300830-
/O.NEW.KTWC.SV.W.0200.210930T0740Z-210930T0830Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
1240 AM MST Thu Sep 30 2021
The National Weather Service in Tucson has issued a
* Severe Thunderstorm Warning for...
Northeastern Pinal County in southeastern Arizona...
* Until 130 AM MST.
* At 1240 AM MST, a severe thunderstorm was located over Kearny, or 9
miles west of Hayden, moving east 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...
Kearny, Dudleyville, Aravaipa Canyon Wilderness, Kelvin and San
Carlos Reservoir.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3298 11078 3303 11073 3307 11073 3308 11069
3314 11064 3313 11059 3316 11053 3318 11053
3318 11050 3290 11047 3288 11102 3316 11107
3325 11095
TIME...MOT...LOC 0740Z 251DEG 20KT 3305 11094
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RH2 follow-up statements
838
WWUS55 KTWC 300808
SVSTWC
Severe Weather Statement
National Weather Service Tucson AZ
108 AM MST Thu Sep 30 2021
AZC021-300830-
/O.CON.KTWC.SV.W.0200.000000T0000Z-210930T0830Z/
Pinal-
108 AM MST Thu Sep 30 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 AM MST
FOR NORTHEASTERN PINAL COUNTY...
At 108 AM MST, a severe thunderstorm was located over Christmas,
moving east at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Kearny, Dudleyville, Aravaipa Canyon Wilderness and San Carlos
Reservoir.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3298 11078 3303 11073 3307 11073 3308 11069
3314 11064 3313 11059 3316 11053 3318 11053
3318 11050 3290 11047 3288 11093 3313 11094
3325 11095
TIME...MOT...LOC 0808Z 251DEG 20KT 3310 11076
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RH388
WWUS55 KTWC 300828
SVSTWC
Severe Weather Statement
National Weather Service Tucson AZ
128 AM MST Thu Sep 30 2021
AZC021-300837-
/O.EXP.KTWC.SV.W.0200.000000T0000Z-210930T0830Z/
Pinal-
128 AM MST Thu Sep 30 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PINAL COUNTY WILL
EXPIRE AT 130 AM 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.
LAT...LON 3298 11078 3303 11073 3307 11073 3308 11069
3314 11064 3313 11059 3316 11053 3318 11053
3318 11050 3290 11047 3288 11093 3313 11094
3325 11095
TIME...MOT...LOC 0827Z 251DEG 20KT 3313 11066
$$
RHThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 29, 11:08 PM MST | Flash Flood Warning | TWC | Pima | 112 min |
| Sep 29, 11:25 PM MST | Areal Flood Advisory | TWC | Pima | 3 hr |
| Sep 29, 11:51 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Sep 29, 11:57 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 48 min |
| Sep 30, 12:13 AM MST | Severe Thunderstorm Warning | TWC | Pima | 47 min |
| Sep 30, 12:24 AM MST | Areal Flood Advisory | TWC | Pima, Pinal | 3 hr |
| Sep 30, 12:57 AM MST | Special Weather Statement | TWC | Pinal | 33 min |
| Sep 30, 3:21 AM MST | Special Weather Statement | TWC | 39 min | |
| Sep 30, 4:05 AM MST | Areal Flood Advisory | TWC | Cochise | 115 min |
| Sep 30, 12:58 PM MST | Special Weather Statement | TWC | Santa Cruz | 47 min |
| Sep 30, 2:23 PM MST | Areal Flood Advisory | TWC | Cochise | 97 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.