Alert archive / Arizona / Special Weather Statements in 2021
Special Weather Statement, NWS Phoenix, AZ
NWS Phoenix, AZ issued this special weather statement at Aug 18, 2021, 5:20 PM MST for Gila County, Arizona. It was in force for 40 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 18, 2021, 5:20 PM MST (00:20 UTC)
- Expired
- Aug 18, 2021, 6:00 PM MST
- In force
- 40 min
- Issued by
- NWS Phoenix, AZ
- Hail
- 0.50 in
- Wind
- 40
County Gila County, AZ
The radar
The Phoenix radar (KIWA), 91 km from the middle of the area, began a volume at 00:22 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, 0.3 hours before the alert went out and 120 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
- 510 J/kg
- Mixed-layer CIN
- -174 J/kg
- Mixed-layer LCL
- 1692 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 157 m²/s²
- 0-3 km storm-relative helicity
- 230 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
The text
As transmitted.
415
WWUS85 KPSR 190020
SPSPSR
Special Weather Statement
National Weather Service Phoenix AZ
520 PM MST Wed Aug 18 2021
AZZ558-560-562-563-190100-
Southeast Gila County AZ-San Carlos AZ-Globe/Miami AZ-
Pinal/Superstition Mountains AZ-
520 PM MST Wed Aug 18 2021
...A strong thunderstorm will impact portions of Gila County through
600 PM MST...
At 519 PM MST, Doppler radar was tracking a strong thunderstorm near
Cutter, or 7 miles southeast of Globe, moving northeast at 20 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...
Globe and Cutter.
This includes the following highways...
US Highway 60 between mile markers 251 and 263.
AZ Route 70 between mile markers 253 and 266.
AZ Route 77 between mile markers 157 and 170.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3314 11071 3321 11089 3354 11072 3344 11041
TIME...MOT...LOC 0019Z 204DEG 16KT 3329 11073
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH
$$
CKThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 5:13 PM MST | Flash Flood Warning | PSR | Gila | 4 hr |
| Aug 18, 5:25 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 50 min |
| Aug 18, 5:34 PM MST | Special Weather Statement | PSR | 41 min | |
| Aug 18, 5:39 PM MST | Flash Flood Warning | PSR | Gila | 4 hr |
| Aug 18, 5:40 PM MST | Special Weather Statement | PSR | Maricopa | 50 min |
| Aug 18, 5:43 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 32 min |
| Aug 18, 5:52 PM MST | Special Weather Statement | PSR | 38 min | |
| Aug 18, 6:09 PM MST | Flash Flood Warning | PSR | Maricopa, Pinal | 3 hr |
| Aug 18, 6:14 PM MST | Flash Flood Warning | PSR | Maricopa | 3 hr |
| Aug 18, 6:20 PM MST | Flash Flood Warning | PSR | Gila | 4 hr |
| Aug 18, 6:36 PM MST | Special Weather Statement | PSR | 39 min | |
| Aug 18, 7:20 PM MST | Areal Flood Warning | PSR | Maricopa | 6 hr |
| Aug 18, 7:33 PM MST | Areal Flood Warning | PSR | Maricopa | 6 hr |
| Aug 18, 7:33 PM MST | Areal Flood Warning | PSR | Maricopa | 6 hr |
| Aug 18, 8:57 PM MST | Areal Flood Warning | PSR | Maricopa | 14 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.