Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 25, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Jul 9, 2021, 4:58 PM MST for Graham County, Pinal County, Arizona. It was in force for 19 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 9, 2021, 4:58 PM MST (23:58 UTC)
- Expired
- Jul 9, 2021, 5:17 PM MST
- In force
- 19 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Graham County, AZ, Pinal County, AZ
The radar
The Tucson radar (KEMX), 87 km from the middle of the area, began a volume at 00:02 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, 12.0 hours before the alert went out and 65 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
- 1372 J/kg
- Mixed-layer CIN
- -170 J/kg
- Mixed-layer LCL
- 1795 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 38 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
589
WUUS55 KTWC 092358
SVRTWC
AZC009-021-100045-
/O.NEW.KTWC.SV.W.0025.210709T2358Z-210710T0045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
458 PM MST Fri Jul 9 2021
The National Weather Service in Tucson has issued a
* Severe Thunderstorm Warning for...
Western Graham County in southeastern Arizona...
Southeastern Pinal County in southeastern Arizona...
* Until 545 PM MST.
* At 457 PM MST, a severe thunderstorm was located 11 miles east of
San Manuel, or 12 miles southeast of Mammoth, moving west at 20
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...
Oracle, Mammoth, San Manuel and Campo Bonito.
This includes Route 77 between mile markers 99 and 119.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3274 11036 3253 11040 3254 11083 3281 11082
TIME...MOT...LOC 2357Z 085DEG 18KT 3265 11045
HAIL...1.00IN
WIND...60MPH
$$1 follow-up statement
433
WWUS55 KTWC 100017
SVSTWC
Severe Weather Statement
National Weather Service Tucson AZ
517 PM MST Fri Jul 9 2021
AZC009-021-100025-
/O.CAN.KTWC.SV.W.0025.000000T0000Z-210710T0045Z/
Graham-Pinal-
517 PM MST Fri Jul 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR WESTERN GRAHAM AND
SOUTHEASTERN PINAL COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However, gusty winds are
still possible with this thunderstorm.
LAT...LON 3274 11036 3253 11040 3254 11083 3281 11082
TIME...MOT...LOC 0011Z 085DEG 18KT 3264 11056
$$The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 5:17 PM MST | Special Weather Statement | TWC | 43 min | |
| Jul 9, 2:52 PM MST | Special Weather Statement | TWC | Santa Cruz | 23 min |
| Jul 9, 3:06 PM MST | Severe Thunderstorm Warning | TWC | Pima | 39 min |
| Jul 9, 3:29 PM MST | Tornado Warning | TWC | Pima | 31 min |
| Jul 9, 3:45 PM MST | Severe Thunderstorm Warning | TWC | Pima | 30 min |
| Jul 9, 3:52 PM MST | Flash Flood Warning | TWC | Pima | 113 min |
| Jul 9, 4:08 PM MST | Severe Thunderstorm Warning | TWC | Pima | 52 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.