Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 177, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Sep 5, 2021, 3:24 PM MST for Graham County, Greenlee County, Arizona. It was in force for 66 min. 7 reports 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
- Sep 5, 2021, 3:24 PM MST (22:24 UTC)
- Expired
- Sep 5, 2021, 4:30 PM MST
- In force
- 66 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), 146 km from the middle of the area, began a volume at 22:26 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 |
|---|---|---|---|
| Sep 5, 3:40 PM MST | HAIL 1 | 1 W Safford, AZ | PUBLIC REPORTED 1 INCH HAIL IN SAFFORD. |
| Sep 5, 3:45 PM MST | TSTM WND DMG | 1 W Safford, AZ | BUILDING DESTROYED WITH SIGNIFICANT ROOF FAILURE. METAL BEAMS APPEARED TO BE BENT IN PICTURES. TIMES ESTIMATED BASED ON REPORTS. |
| Sep 5, 3:45 PM MST | TSTM WND DMG | Safford, AZ | TIME ESTIMATED BASED ON PUBLIC REPORT. WELL BUILT METAL SIGN DESTROYED. |
| Sep 5, 3:56 PM MST | TSTM WND GST 68 | 4 Ene Safford, AZ | KSAD MEASURED THUNDERSTORM WIND GUSTS TO 68 MPH. |
| Sep 5, 4:10 PM MST | TSTM WND DMG | 5 S Safford, AZ | LARGE RV CLOSE TO 50 FEET LONG FLIPPED OVER FROM STRONG WINDS. TIMES ESTIMATED. |
| Sep 5, 4:10 PM MST | TSTM WND DMG | 5 S Safford, AZ | ROOF PEELED OFF SHED OR BARN. TIME ESTIMATED OFF REPORTS. |
| Sep 5, 4:15 PM MST | TSTM WND DMG | 1 Ene Thatcher, AZ | WIDESPREAD DAMAGE ACROSS THE SAFFORD AREA. ROOF DAMAGE, STRUCTURE DAMAGE, NUMEROUS TREES SNAPPED OR UPROOTED, NUMEROUS POWERLINES DOWN, AND OTHER DAMAGE. TIMES ESTIMATED. |
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, 10.4 hours before the alert went out and 144 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
- 1016 J/kg
- Mixed-layer CIN
- -184 J/kg
- Mixed-layer LCL
- 1856 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
526
WUUS55 KTWC 052224
SVRTWC
AZC009-011-052330-
/O.NEW.KTWC.SV.W.0177.210905T2224Z-210905T2330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
324 PM MST Sun Sep 5 2021
The National Weather Service in Tucson has issued a
* Severe Thunderstorm Warning for...
East central Graham County in southeastern Arizona...
West central Greenlee County in southeastern Arizona...
* Until 430 PM MST.
* At 324 PM MST, a severe thunderstorm was located 8 miles northeast
of Safford Regional Airport, or 11 miles northeast of Safford,
moving south 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...
Safford, Thatcher, Solomon, Roper Lake State Park, Safford Regional
Airport, Pima, Central and Swift Trail Junction.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3303 10980 3308 10960 3302 10941 3274 10934
3271 10963 3280 10997
TIME...MOT...LOC 2224Z 021DEG 9KT 3294 10955
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
JRM4 follow-up statements
093
WWUS55 KTWC 052236
SVSTWC
Severe Weather Statement
National Weather Service Tucson AZ
336 PM MST Sun Sep 5 2021
AZC009-011-052330-
/O.CON.KTWC.SV.W.0177.000000T0000Z-210905T2330Z/
Graham-Greenlee-
336 PM MST Sun Sep 5 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM MST
FOR EAST CENTRAL GRAHAM AND WEST CENTRAL GREENLEE COUNTIES...
At 335 PM MST, a severe thunderstorm was located near Safford
Regional Airport, or 7 miles northeast of Safford. Another severe
thunderstorm is developing over Safford. Both storms are moving
southwest at 15 mph.
HAZARD...70 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect considerable
tree damage. Wind damage is also likely to mobile homes,
roofs, and outbuildings.
Locations impacted include...
Safford, Thatcher, Solomon, Roper Lake State Park, Safford Regional
Airport, Pima, Central and Swift Trail Junction.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3303 10980 3308 10960 3302 10941 3274 10934
3271 10963 3280 10997
TIME...MOT...LOC 2235Z 036DEG 11KT 3291 10961
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
JRM554
WWUS55 KTWC 052247
SVSTWC
Severe Weather Statement
National Weather Service Tucson AZ
347 PM MST Sun Sep 5 2021
AZC009-011-052330-
/O.CON.KTWC.SV.W.0177.000000T0000Z-210905T2330Z/
Graham-Greenlee-
347 PM MST Sun Sep 5 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM MST
FOR EAST CENTRAL GRAHAM AND WEST CENTRAL GREENLEE COUNTIES...
At 347 PM MST, a severe thunderstorm was located over Safford
Regional Airport, or near Safford, moving south at 10 mph.
HAZARD...70 mph wind gusts and ping pong ball size hail.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
considerable tree damage. Wind damage is also likely to
mobile homes, roofs, and outbuildings.
Locations impacted include...
Safford, Thatcher, Solomon, Roper Lake State Park, Safford Regional
Airport, Pima, Central and Swift Trail Junction.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
This is a dangerous storm, producing large hail driven by severe
winds! SEEK SHELTER NOW inside a sturdy structure and stay away from
windows! If you are caught outdoors, cover your head and neck.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3296 10978 3302 10959 3302 10941 3274 10934
3271 10963 3280 10997
TIME...MOT...LOC 2247Z 021DEG 9KT 3288 10962
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
JRM880
WWUS55 KTWC 052303
SVSTWC
Severe Weather Statement
National Weather Service Tucson AZ
403 PM MST Sun Sep 5 2021
AZC011-052311-
/O.CAN.KTWC.SV.W.0177.000000T0000Z-210905T2330Z/
Greenlee-
403 PM MST Sun Sep 5 2021
...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL GREENLEE COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the area. Therefore, the warning has been cancelled.
LAT...LON 3287 10989 3288 10967 3284 10947 3273 10942
3271 10963 3280 10997
TIME...MOT...LOC 2301Z 028DEG 10KT 3279 10973
$$
AZC009-052330-
/O.CON.KTWC.SV.W.0177.000000T0000Z-210905T2330Z/
Graham-
403 PM MST Sun Sep 5 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM MST
FOR CENTRAL GRAHAM COUNTY...
At 401 PM MST, a severe thunderstorm was located over Roper Lake
State Park, or near Safford, moving southwest at 10 mph.
HAZARD...70 mph wind gusts and quarter size hail.
SOURCE...Radar indicated. At 348 PM, a wind gust to 68 mph was
reported at Safford Airport. Other gusts near 60 mph were
also reported around the area.
IMPACT...Hail damage to vehicles is expected. Expect considerable
tree damage. Wind damage is also likely to mobile homes,
roofs, and outbuildings.
Locations impacted include...
Safford, Thatcher, Solomon, Roper Lake State Park, Safford Regional
Airport, Central and Swift Trail Junction.
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 3287 10989 3288 10967 3284 10947 3273 10942
3271 10963 3280 10997
TIME...MOT...LOC 2301Z 028DEG 10KT 3279 10973
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
JRM771
WWUS55 KTWC 052320
SVSTWC
Severe Weather Statement
National Weather Service Tucson AZ
420 PM MST Sun Sep 5 2021
AZC009-052330-
/O.EXP.KTWC.SV.W.0177.000000T0000Z-210905T2330Z/
Graham-
420 PM MST Sun Sep 5 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL GRAHAM COUNTY WILL
EXPIRE AT 430 PM MST...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with this thunderstorm.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Tucson.
LAT...LON 3287 10989 3288 10967 3284 10947 3273 10942
3271 10963 3280 10997
TIME...MOT...LOC 2320Z 021DEG 9KT 3275 10975
$$
JRMThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 11:52 AM MST | Special Weather Statement | TWC | Santa Cruz | 23 min |
| Sep 5, 12:12 PM MST | Special Weather Statement | TWC | Cochise | 33 min |
| Sep 5, 12:24 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 51 min |
| Sep 5, 12:37 PM MST | Areal Flood Advisory | TWC | Cochise | 7 min |
| Sep 5, 12:44 PM MST | Flash Flood Warning | TWC | Cochise | 106 min |
| Sep 5, 12:58 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 19 min |
| Sep 5, 1:02 PM MST | Severe Thunderstorm Warning | TWC | Pima, Santa Cruz | 43 min |
| Sep 5, 1:26 PM MST | Areal Flood Advisory | TWC | Santa Cruz | 2 hr |
| Sep 5, 2:10 PM MST | Special Weather Statement | TWC | Santa Cruz | 50 min |
| Sep 5, 2:15 PM MST | Special Weather Statement | TWC | Graham | 45 min |
| Sep 5, 2:25 PM MST | Special Weather Statement | TWC | Santa Cruz | 50 min |
| Sep 5, 2:29 PM MST | Severe Thunderstorm Warning | TWC | Graham, Greenlee | 61 min |
| Sep 5, 2:31 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Pima | 44 min |
| Sep 5, 2:34 PM MST | Special Weather Statement | TWC | Graham | 41 min |
| Sep 5, 2:54 PM MST | Areal Flood Advisory | TWC | Pima | 111 min |
| Sep 5, 3:08 PM MST | Severe Thunderstorm Warning | TWC | Pima, Santa Cruz | 37 min |
| Sep 5, 3:13 PM MST | Flash Flood Warning | TWC | Pima | 2 hr |
| Sep 5, 3:15 PM MST | Tornado Warning | TWC | Pima | 15 min |
| Sep 5, 3:22 PM MST | Dust Storm Warning | TWC | Pima | 113 min |
| Sep 5, 3:37 PM MST | Severe Thunderstorm Warning | TWC | Pima, Santa Cruz | 53 min |
| Sep 5, 3:40 PM MST | Severe Thunderstorm Warning | TWC | Pima | 50 min |
| Sep 5, 3:41 PM MST | Flash Flood Warning | TWC | Graham | 2 hr |
| Sep 5, 3:52 PM MST | Severe Thunderstorm Warning | TWC | Pima | 38 min |
| Sep 5, 3:55 PM MST | Areal Flood Advisory | TWC | Pima | 2 hr |
| Sep 5, 4:00 PM MST | Severe Thunderstorm Warning | TWC | Graham | 45 min |
| Sep 5, 4:06 PM MST | Areal Flood Advisory | TWC | Pima | 114 min |
| Sep 5, 4:12 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Sep 5, 4:16 PM MST | Severe Thunderstorm Warning | TWC | Pima | 59 min |
| Sep 5, 4:30 PM MST | Severe Thunderstorm Warning | TWC | Pima | 45 min |
| Sep 5, 4:42 PM MST | Dust Storm Warning | TWC | Pima, Pinal | 93 min |
| Sep 5, 4:42 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Graham | 63 min |
| Sep 5, 4:47 PM MST | Severe Thunderstorm Warning | TWC | Pima, Pinal | 43 min |
| Sep 5, 4:48 PM MST | Flash Flood Warning | TWC | Pima | 117 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.