Alert archive / Arizona / Special Weather Statements in 2021
Special Weather Statement, NWS Tucson, AZ
NWS Tucson, AZ issued this special weather statement at Aug 7, 2021, 5:46 PM MST. It was in force for 44 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 7, 2021, 5:46 PM MST (00:46 UTC)
- Expired
- Aug 7, 2021, 6:30 PM MST
- In force
- 44 min
- Issued by
- NWS Tucson, AZ
- Hail
- 0.50 in
- Wind
- 40
The radar
The Phoenix radar (KIWA), 132 km from the middle of the area, began a volume at 00:49 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
Phoenix, AZ (KPSR), launched 00:00Z, 0.8 hours before the alert went out and 133 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
- 717 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 3053 m above ground
- 0-6 km bulk shear
- 2 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- 6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
577
WWUS85 KTWC 080046
SPSTWC
Special Weather Statement
National Weather Service Tucson AZ
546 PM MST Sat Aug 7 2021
AZZ502-080130-
Tohono O'odham Nation including Sells-
546 PM MST Sat Aug 7 2021
...A strong thunderstorm will impact portions of north central Pima
County through 630 PM MST...
At 546 PM MST, Doppler radar was tracking a strong thunderstorm over
Hickiwan, or 24 miles east of Ajo, moving southeast at 35 mph.
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...
Hickiwan, San Simon, Vaya Chin and San Simon West.
This includes Route 86 between mile markers 64 and 84.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3229 11260 3245 11251 3247 11229 3216 11224
3220 11259
TIME...MOT...LOC 0046Z 294DEG 31KT 3234 11246
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH
$$
SingerThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 2:54 PM MST | Special Weather Statement | TWC | Greenlee | 36 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.