Alert archive / Arizona / Special Weather Statements in 2021
Special Weather Statement, NWS Tucson, AZ
NWS Tucson, AZ issued this special weather statement at Aug 8, 2021, 2:54 PM MST for Greenlee County, Arizona. It was in force for 36 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
- Aug 8, 2021, 2:54 PM MST (21:54 UTC)
- Expired
- Aug 8, 2021, 3:30 PM MST
- In force
- 36 min
- Issued by
- NWS Tucson, AZ
- Hail
- 0.50 in
- Wind
- 40
County Greenlee County, AZ
The radar
The Tucson radar (KEMX), 164 km from the middle of the area, began a volume at 21:56 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, 9.9 hours before the alert went out and 165 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
- 359 J/kg
- Mixed-layer CIN
- -232 J/kg
- Mixed-layer LCL
- 1832 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -31 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
943
WWUS85 KTWC 082154
SPSTWC
Special Weather Statement
National Weather Service Tucson AZ
254 PM MST Sun Aug 8 2021
AZZ509-510-082230-
Upper Gila River and Aravaipa Valleys including Clifton/Safford-White
Mountains of Graham and Greenlee Counties including Hannagan Meadow-
254 PM MST Sun Aug 8 2021
...A strong thunderstorm will impact portions of east central Graham
and central Greenlee Counties through 330 PM MST...
At 254 PM MST, Doppler radar was tracking a strong thunderstorm near
Morenci, or 7 miles southwest of Clifton. This storm was nearly
stationary.
HAZARD...Winds in excess of 40 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Clifton, Morenci, Three Way and Guthrie.
This includes the following highways...
Route 75 near mile marker 398.
Route 191 between mile markers 137 and 165, and between mile markers
167 and 168.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3283 10949 3307 10945 3305 10920 3281 10926
TIME...MOT...LOC 2154Z 280DEG 2KT 3297 10939
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH
$$
KJSThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 5:46 PM MST | Special Weather Statement | TWC | 44 min | |
| Aug 7, 5:54 PM MST | Special Weather Statement | TWC | Greenlee | 36 min |
| Aug 7, 6:19 PM MST | Areal Flood Advisory | TWC | Pima | 116 min |
| Aug 8, 2:48 PM MST | Severe Thunderstorm Warning | TWC | Pima | 42 min |
| Aug 8, 3:08 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Aug 8, 3:42 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 33 min |
| Aug 8, 3:46 PM MST | Special Weather Statement | TWC | 44 min | |
| Aug 8, 4:11 PM MST | Special Weather Statement | TWC | Pima | 49 min |
| Aug 8, 4:12 PM MST | Special Weather Statement | TWC | Santa Cruz | 33 min |
| Aug 8, 4:19 PM MST | Severe Thunderstorm Warning | TWC | Santa Cruz | 86 min |
| Aug 8, 4:21 PM MST | Flash Flood Warning | TWC | Cochise | 114 min |
| Aug 8, 4:21 PM MST | Severe Thunderstorm Warning | TWC | Santa Cruz | 84 min |
| Aug 8, 4:26 PM MST | Areal Flood Advisory | TWC | Pima | 2 hr |
| Aug 8, 4:33 PM MST | Special Weather Statement | TWC | Cochise | 27 min |
| Aug 8, 4:48 PM MST | Flash Flood Warning | TWC | Santa Cruz | 3 hr |
Nearby
Special Weather Statements in Arizona, 2021Every special weather statement 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.