Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 4, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Jun 28, 2021, 3:37 PM MST for Graham County, Arizona. It was in force for 38 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 28, 2021, 3:37 PM MST (22:37 UTC)
- Expired
- Jun 28, 2021, 4:15 PM MST
- In force
- 38 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Graham County, AZ
The radar
The Tucson radar (KEMX), 146 km from the middle of the area, began a volume at 22:39 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 28, 4:05 PM MST | TSTM WND DMG | 2 Ese Pima, AZ | REPORTS FROM THE PUBLIC INTO RADIO STATION OF ROOFS BLOWN OFF, BLOCK WALLS AND TREES BLOWN OVER BETWEEN PIMA AND THATCHER. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 10.6 hours before the alert went out and 139 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2852 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- -41 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
099 WUUS55 KTWC 282237 SVRTWC AZC009-282315- /O.NEW.KTWC.SV.W.0004.210628T2237Z-210628T2315Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Tucson AZ 337 PM MST Mon Jun 28 2021 The National Weather Service in Tucson has issued a * Severe Thunderstorm Warning for... Central Graham County in southeastern Arizona... * Until 415 PM MST. * At 336 PM MST, a severe thunderstorm was located near and west of Safford Regional Airport, moving southwest at 15 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Safford, Thatcher, Solomon, Roper Lake State Park, Safford Regional Airport, Pima, Central, Fort Thomas and Swift Trail Junction. This includes the following highways... Route 70 between mile markers 306 and 345. Route 191 between mile markers 116 and 120. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3315 10981 3295 10951 3273 10968 3297 11009 TIME...MOT...LOC 2236Z 030DEG 15KT 3291 10965 HAIL...0.75IN WIND...60MPH $$ Meyer
2 follow-up statements
487 WWUS55 KTWC 282259 SVSTWC Severe Weather Statement National Weather Service Tucson AZ 359 PM MST Mon Jun 28 2021 AZC009-282315- /O.CON.KTWC.SV.W.0004.000000T0000Z-210628T2315Z/ Graham- 359 PM MST Mon Jun 28 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM MST FOR CENTRAL GRAHAM COUNTY... At 354 PM MST, the severe thunderstorm located just north of Thatcher and Safford was beginning to weaken, but remained capable of generating damaging outflow. Movement was to the southwest at 15 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Safford, Thatcher, Solomon, Roper Lake State Park, Safford Regional Airport, and Pima. This includes the following highways... Route 70 between mile markers 306 and 345. Route 191 between mile markers 116 and 120. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3315 10981 3295 10951 3273 10968 3297 11009 TIME...MOT...LOC 2254Z 039DEG 16KT 3286 10975 HAIL...0.75IN WIND...60MPH $$ Meyer
479
WWUS55 KTWC 282317
SVSTWC
Severe Weather Statement
National Weather Service Tucson AZ
417 PM MST Mon Jun 28 2021
AZC009-282326-
/O.EXP.KTWC.SV.W.0004.000000T0000Z-210628T2315Z/
Graham-
417 PM MST Mon Jun 28 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL GRAHAM COUNTY HAS
EXPIRED...
The storm which prompted the warning northwest and west of
Safford has weakened below severe limits, and no longer poses an
immediate threat to life or property. Therefore, the warning has
been allowed to expire. However gusty winds to 45 mph are still
possible with this thunderstorm.
LAT...LON 3315 10981 3295 10951 3273 10968 3297 11009
TIME...MOT...LOC 2316Z 030DEG 15KT 3279 10979
$$
MeyerThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 9:50 AM MST | Blowing Dust Advisory | TWC | Pima, Pinal | 10 hr |
| Jun 28, 2:13 PM MST | Special Weather Statement | TWC | Graham | 62 min |
| Jun 28, 3:15 PM MST | Special Weather Statement | TWC | Graham | 60 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.