Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 72, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Jul 18, 2021, 6:12 PM MST for Cochise County, Graham County, Arizona. It was in force for 48 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
- Jul 18, 2021, 6:12 PM MST (01:12 UTC)
- Expired
- Jul 18, 2021, 7:00 PM MST
- In force
- 48 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Cochise County, AZ, Graham County, AZ
The radar
The Tucson radar (KEMX), 89 km from the middle of the area, began a volume at 01:13 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, 1.2 hours before the alert went out and 232 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
- 1031 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 2190 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- -20 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
The text
As transmitted.
522
WUUS55 KTWC 190112
SVRTWC
AZC003-009-190200-
/O.NEW.KTWC.SV.W.0072.210719T0112Z-210719T0200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
612 PM MST Sun Jul 18 2021
The National Weather Service in Tucson has issued a
* Severe Thunderstorm Warning for...
Southern Graham County in southeastern Arizona...
Northern Cochise County in southeastern Arizona...
* Until 700 PM MST.
* At 612 PM MST, a severe thunderstorm was located near Willcox,
moving north at 10 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...
Willcox.
This includes the following highways...
Interstate 10 between mile markers 336 and 347.
Route 186 between mile markers 327 and 328.
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 3230 10973 3221 10989 3241 11004 3251 10985
TIME...MOT...LOC 0112Z 165DEG 10KT 3233 10986
HAIL...1.00IN
WIND...60MPH
$$
AH2 follow-up statements
892
WWUS55 KTWC 190128
SVSTWC
Severe Weather Statement
National Weather Service Tucson AZ
628 PM MST Sun Jul 18 2021
AZC003-009-190200-
/O.CON.KTWC.SV.W.0072.000000T0000Z-210719T0200Z/
Graham-Cochise-
628 PM MST Sun Jul 18 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM MST
FOR SOUTHERN GRAHAM AND NORTHERN COCHISE COUNTIES...
At 628 PM MST, a severe thunderstorm was located 10 miles north of
Willcox, moving north at 15 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Willcox.
This includes the following highways...
Interstate 10 between mile markers 340 and 347.
Route 186 near mile marker 327.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3230 10973 3224 10988 3243 11001 3251 10985
TIME...MOT...LOC 0128Z 178DEG 12KT 3240 10985
HAIL...1.00IN
WIND...60MPH
$$
AH925
WWUS55 KTWC 190151
SVSTWC
Severe Weather Statement
National Weather Service Tucson AZ
651 PM MST Sun Jul 18 2021
AZC003-009-190200-
/O.EXP.KTWC.SV.W.0072.000000T0000Z-210719T0200Z/
Graham-Cochise-
651 PM MST Sun Jul 18 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN GRAHAM AND NORTHERN
COCHISE COUNTIES WILL EXPIRE AT 700 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.
LAT...LON 3230 10973 3224 10988 3243 11001 3251 10985
TIME...MOT...LOC 0150Z 165DEG 10KT 3245 10987
$$
AHThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 5:06 PM MST | Special Weather Statement | TWC | 39 min | |
| Jul 18, 5:10 PM MST | Special Weather Statement | TWC | Cochise | 35 min |
| Jul 18, 5:27 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Graham | 48 min |
| Jul 18, 5:30 PM MST | Flash Flood Warning | TWC | Cochise | 3 hr |
| Jul 18, 5:37 PM MST | Flash Flood Warning | TWC | Cochise, Graham, Greenlee | 3 hr |
| Jul 18, 5:42 PM MST | Areal Flood Advisory | TWC | Cochise, Santa Cruz | 3 hr |
| Jul 18, 5:46 PM MST | Special Weather Statement | TWC | 44 min | |
| Jul 18, 6:01 PM MST | Special Weather Statement | TWC | Cochise | 59 min |
| Jul 18, 6:02 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Santa Cruz | 43 min |
| Jul 18, 6:06 PM MST | Flash Flood Warning | TWC | Cochise | 2 hr |
| Jul 18, 6:11 PM MST | Areal Flood Advisory | TWC | Santa Cruz | 3 hr |
| Jul 18, 6:24 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Pima | 36 min |
| Jul 18, 6:33 PM MST | Flash Flood Warning | TWC | Cochise, Graham | 3 hr |
| Jul 18, 6:39 PM MST | Special Weather Statement | TWC | 66 min | |
| Jul 18, 6:43 PM MST | Areal Flood Advisory | TWC | Cochise, Graham, Pima | 3 hr |
| Jul 18, 7:00 PM MST | Flash Flood Warning | TWC | Cochise, Pima | 3 hr |
| Jul 18, 7:07 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Pima | 38 min |
| Jul 18, 7:23 PM MST | Areal Flood Advisory | TWC | Cochise, Pima, Santa Cruz | 3 hr |
| Jul 18, 7:29 PM MST | Severe Thunderstorm Warning | TWC | Pima | 61 min |
| Jul 18, 7:36 PM MST | Special Weather Statement | TWC | Cochise | 39 min |
| Jul 18, 7:45 PM MST | Areal Flood Advisory | TWC | Cochise | 3 hr |
| Jul 18, 7:51 PM MST | Special Weather Statement | TWC | 39 min | |
| Jul 18, 8:20 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Jul 18, 9:30 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Jul 19, 3:23 PM MST | Special Weather Statement | TWC | Greenlee | 22 min |
| Jul 19, 4:03 PM MST | Areal Flood Advisory | TWC | Greenlee | 3 hr |
| Jul 19, 4:06 PM MST | Severe Thunderstorm Warning | TWC | Graham, Greenlee | 39 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.