Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 199, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Sep 30, 2021, 12:13 AM MST for Pima County, Arizona. It was in force for 47 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, 12:13 AM MST (07:13 UTC)
- Expired
- Sep 30, 2021, 1:00 AM MST
- In force
- 47 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), 88 km from the middle of the area, began a volume at 07:14 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 nearest sounding before it
Tuscon, AZ (KTUS), launched 00:00Z, 7.2 hours before the alert went out and 66 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.
517
WUUS55 KTWC 300713
SVRTWC
AZC019-300800-
/O.NEW.KTWC.SV.W.0199.210930T0713Z-210930T0800Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
1213 AM MST Thu Sep 30 2021
The National Weather Service in Tucson has issued a
* Severe Thunderstorm Warning for...
Central Pima County in southeastern Arizona...
* Until 100 AM MST.
* At 1212 AM MST, a severe thunderstorm was located near Kitt Peak,
or 16 miles east of Sells, moving east at 15 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...
Kitt Peak, San Pedro and Pan Tak.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3191 11170 3209 11170 3212 11134 3184 11137
TIME...MOT...LOC 0712Z 268DEG 14KT 3200 11162
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$1 follow-up statement
178
WWUS55 KTWC 300758
SVSTWC
Severe Weather Statement
National Weather Service Tucson AZ
1258 AM MST Thu Sep 30 2021
AZC019-300808-
/O.EXP.KTWC.SV.W.0199.000000T0000Z-210930T0800Z/
Pima-
1258 AM MST Thu Sep 30 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL PIMA COUNTY WILL
EXPIRE AT 100 AM MST...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.
LAT...LON 3191 11170 3209 11170 3212 11134 3184 11137
TIME...MOT...LOC 0758Z 280DEG 5KT 3200 11150
$$The 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, 12:24 AM MST | Areal Flood Advisory | TWC | Pima, Pinal | 3 hr |
| Sep 30, 12:40 AM MST | Severe Thunderstorm Warning | TWC | Pinal | 50 min |
| 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.