Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 123, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Aug 8, 2021, 2:48 PM MST for Pima County, Arizona. It was in force for 42 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
- Aug 8, 2021, 2:48 PM MST (21:48 UTC)
- Expired
- Aug 8, 2021, 3:30 PM MST
- In force
- 42 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
County Pima County, AZ
The radar
The Tucson radar (KEMX), 87 km from the middle of the area, began a volume at 21:48 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, 9.8 hours before the alert went out and 73 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
- 359 J/kg
- Mixed-layer CIN
- -232 J/kg
- Mixed-layer LCL
- 1832 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -31 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
541
WUUS55 KTWC 082148
SVRTWC
AZC019-082230-
/O.NEW.KTWC.SV.W.0123.210808T2148Z-210808T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
248 PM MST Sun Aug 8 2021
The National Weather Service in Tucson has issued a
* Severe Thunderstorm Warning for...
Central Pima County in southeastern Arizona...
* Until 330 PM MST.
* At 248 PM MST, a severe thunderstorm was located 10 miles south of
Kitt Peak, or 21 miles east of Sells, and is nearly stationary.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* This severe thunderstorm will remain over mainly remote areas of
central Pima County.
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 3177 11163 3190 11162 3191 11144 3173 11144
TIME...MOT...LOC 2148Z 273DEG 1KT 3182 11154
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
JRM2 follow-up statements
690 WWUS55 KTWC 082209 SVSTWC Severe Weather Statement National Weather Service Tucson AZ 309 PM MST Sun Aug 8 2021 AZC019-082230- /O.CON.KTWC.SV.W.0123.000000T0000Z-210808T2230Z/ Pima- 309 PM MST Sun Aug 8 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM MST FOR CENTRAL PIMA COUNTY... At 309 PM MST, a severe thunderstorm was located 10 miles south of Kitt Peak, or 21 miles east of Sells, and is nearly stationary. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. This severe thunderstorm will remain over mainly remote areas of central Pima County. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3177 11163 3190 11162 3191 11144 3173 11144 TIME...MOT...LOC 2209Z 273DEG 1KT 3182 11153 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...0.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ JRM
112
WWUS55 KTWC 082222
SVSTWC
Severe Weather Statement
National Weather Service Tucson AZ
322 PM MST Sun Aug 8 2021
AZC019-082231-
/O.EXP.KTWC.SV.W.0123.000000T0000Z-210808T2230Z/
Pima-
322 PM MST Sun Aug 8 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL PIMA COUNTY WILL
EXPIRE AT 330 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 gusty
winds and heavy rain are still possible with this thunderstorm.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Tucson.
LAT...LON 3177 11163 3190 11162 3191 11144 3173 11144
TIME...MOT...LOC 2221Z 273DEG 1KT 3182 11153
$$
JRMThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 5:46 PM MST | Special Weather Statement | TWC | 44 min | |
| Aug 7, 5:54 PM MST | Special Weather Statement | TWC | Greenlee | 36 min |
| Aug 7, 6:19 PM MST | Areal Flood Advisory | TWC | Pima | 116 min |
| Aug 8, 2:54 PM MST | Special Weather Statement | TWC | Greenlee | 36 min |
| Aug 8, 3:08 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Aug 8, 3:42 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 33 min |
| Aug 8, 3:46 PM MST | Special Weather Statement | TWC | 44 min | |
| Aug 8, 4:11 PM MST | Special Weather Statement | TWC | Pima | 49 min |
| Aug 8, 4:12 PM MST | Special Weather Statement | TWC | Santa Cruz | 33 min |
| Aug 8, 4:19 PM MST | Severe Thunderstorm Warning | TWC | Santa Cruz | 86 min |
| Aug 8, 4:21 PM MST | Flash Flood Warning | TWC | Cochise | 114 min |
| Aug 8, 4:21 PM MST | Severe Thunderstorm Warning | TWC | Santa Cruz | 84 min |
| Aug 8, 4:26 PM MST | Areal Flood Advisory | TWC | Pima | 2 hr |
| Aug 8, 4:33 PM MST | Special Weather Statement | TWC | Cochise | 27 min |
| Aug 8, 4:48 PM MST | Flash Flood Warning | TWC | Santa Cruz | 3 hr |
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.