Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 76, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Jul 19, 2021, 4:06 PM MST for Graham County, Greenlee County, Arizona. It was in force for 39 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 19, 2021, 4:06 PM MST (23:06 UTC)
- Expired
- Jul 19, 2021, 4:45 PM MST
- In force
- 39 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Graham County, AZ, Greenlee County, AZ
The radar
The Tucson radar (KEMX), 183 km from the middle of the area, began a volume at 23:06 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, 11.1 hours before the alert went out and 178 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
- 59 J/kg
- Mixed-layer CIN
- -237 J/kg
- Mixed-layer LCL
- 1706 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -28 m²/s²
- 0-3 km storm-relative helicity
- 25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
990
WUUS55 KTWC 192306
SVRTWC
AZC009-011-192345-
/O.NEW.KTWC.SV.W.0076.210719T2306Z-210719T2345Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
406 PM MST Mon Jul 19 2021
The National Weather Service in Tucson has issued a
* Severe Thunderstorm Warning for...
Central Graham County in southeastern Arizona...
West central Greenlee County in southeastern Arizona...
* Until 445 PM MST.
* At 406 PM MST, a severe thunderstorm was located 11 miles northwest
of Morenci, or 13 miles northwest of Clifton, moving west 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.
* This severe thunderstorm will remain over mainly remote areas of
central Graham and west central Greenlee Counties.
This includes Route 191 between mile markers 174 and 186.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3320 10929 3308 10932 3311 10968 3336 10959
TIME...MOT...LOC 2306Z 101DEG 10KT 3319 10942
HAIL...1.00IN
WIND...60MPH
$$
JRM2 follow-up statements
909 WWUS55 KTWC 192326 SVSTWC Severe Weather Statement National Weather Service Tucson AZ 426 PM MST Mon Jul 19 2021 AZC009-011-192345- /O.CON.KTWC.SV.W.0076.000000T0000Z-210719T2345Z/ Graham-Greenlee- 426 PM MST Mon Jul 19 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM MST FOR CENTRAL GRAHAM AND WEST CENTRAL GREENLEE COUNTIES... At 425 PM MST, a severe thunderstorm was located 14 miles northwest of Morenci, or 16 miles northwest of Clifton, moving west at 10 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. This severe thunderstorm will remain over mainly remote areas of central Graham and west central Greenlee Counties. This includes Route 191 between mile markers 179 and 180. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3319 10936 3309 10939 3311 10968 3336 10959 TIME...MOT...LOC 2325Z 101DEG 10KT 3320 10948 HAIL...0.75IN WIND...60MPH $$ JRM
339
WWUS55 KTWC 192339
SVSTWC
Severe Weather Statement
National Weather Service Tucson AZ
439 PM MST Mon Jul 19 2021
AZC009-011-192349-
/O.EXP.KTWC.SV.W.0076.000000T0000Z-210719T2345Z/
Graham-Greenlee-
439 PM MST Mon Jul 19 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL GRAHAM AND WEST
CENTRAL GREENLEE COUNTIES WILL EXPIRE AT 445 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.
LAT...LON 3319 10936 3309 10939 3311 10968 3336 10959
TIME...MOT...LOC 2339Z 101DEG 10KT 3321 10952
$$
JRMThe 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, 6:12 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Graham | 48 min |
| 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 |
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.