Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 187, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Sep 5, 2021, 5:18 PM MST for Cochise County, Graham County, 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
- Sep 5, 2021, 5:18 PM MST (00:18 UTC)
- Expired
- Sep 5, 2021, 6:00 PM MST
- In force
- 42 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Cochise County, AZ, Graham County, AZ, Pima County, AZ
The radar
The Tucson radar (KEMX), 53 km from the middle of the area, began a volume at 00:21 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
Phoenix, AZ (KPSR), launched 00:00Z, 0.3 hours before the alert went out and 205 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
- 48 J/kg
- Mixed-layer CIN
- -147 J/kg
- Mixed-layer LCL
- 3562 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
615 WUUS55 KTWC 060018 SVRTWC AZC003-009-019-060100- /O.NEW.KTWC.SV.W.0187.210906T0018Z-210906T0100Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Tucson AZ 518 PM MST Sun Sep 5 2021 The National Weather Service in Tucson has issued a * Severe Thunderstorm Warning for... East central Pima County in southeastern Arizona... Southwestern Graham County in southeastern Arizona... Northwestern Cochise County in southeastern Arizona... * Until 600 PM MST. * At 518 PM MST, a severe thunderstorm was located 20 miles west of Willcox, moving southwest at 30 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Saguaro National Park East, Muleshoe Ranch Preserve, Texas Canyon and Cascabel. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Wind damage with this storm may occur before any rain or lightning. Do not wait for the sound of thunder before taking cover. SEEK SHELTER IMMEDIATELY inside a sturdy structure and stay away from windows. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3244 11033 3221 10990 3194 11019 3227 11064 TIME...MOT...LOC 0018Z 039DEG 24KT 3233 11018 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...0.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ JRM
2 follow-up statements
656
WWUS55 KTWC 060037
SVSTWC
Severe Weather Statement
National Weather Service Tucson AZ
537 PM MST Sun Sep 5 2021
AZC009-060046-
/O.CAN.KTWC.SV.W.0187.000000T0000Z-210906T0100Z/
Graham-
537 PM MST Sun Sep 5 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN GRAHAM COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3235 11015 3223 11002 3194 11019 3227 11064
3236 11018
TIME...MOT...LOC 0036Z 039DEG 24KT 3224 11027
$$
AZC003-019-060100-
/O.CON.KTWC.SV.W.0187.000000T0000Z-210906T0100Z/
Pima-Cochise-
537 PM MST Sun Sep 5 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM MST
FOR EAST CENTRAL PIMA AND NORTHWESTERN COCHISE COUNTIES...
At 536 PM MST, a severe thunderstorm was located 19 miles northwest
of Dragoon, or 19 miles north of Benson, moving southwest at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Saguaro National Park East, Muleshoe Ranch Preserve and Cascabel.
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 3235 11015 3223 11002 3194 11019 3227 11064
3236 11018
TIME...MOT...LOC 0036Z 039DEG 24KT 3224 11027
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
JRM721
WWUS55 KTWC 060054
SVSTWC
Severe Weather Statement
National Weather Service Tucson AZ
554 PM MST Sun Sep 5 2021
AZC003-019-060103-
/O.EXP.KTWC.SV.W.0187.000000T0000Z-210906T0100Z/
Pima-Cochise-
554 PM MST Sun Sep 5 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL PIMA AND
NORTHWESTERN COCHISE COUNTIES WILL EXPIRE AT 600 PM MST...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds are still possible with this thunderstorm.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Tucson.
LAT...LON 3235 11015 3223 11002 3194 11019 3227 11064
3236 11018
TIME...MOT...LOC 0053Z 039DEG 24KT 3214 11036
$$
JRMThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 5:01 PM MST | Severe Thunderstorm Warning | TWC | Graham, Pinal | 59 min |
| Sep 5, 5:09 PM MST | Flash Flood Warning | TWC | Pima | 111 min |
| Sep 5, 5:37 PM MST | Dust Storm Advisory | TWC | Pima, Pinal | 95 min |
| Sep 5, 5:41 PM MST | Flash Flood Warning | TWC | Pinal | 2 hr |
| Sep 5, 5:58 PM MST | Severe Thunderstorm Warning | TWC | Pima, Pinal | 47 min |
| Sep 5, 6:02 PM MST | Special Weather Statement | TWC | 43 min | |
| Sep 5, 6:39 PM MST | Areal Flood Advisory | TWC | Pima, Pinal | 2 hr |
| Sep 5, 7:05 PM MST | Special Weather Statement | TWC | Pima | 40 min |
| Sep 5, 10:09 PM MST | Areal Flood Advisory | TWC | Pima | 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.