Alert archive / Arizona / Special Weather Statements in 2021
Special Weather Statement, NWS Phoenix, AZ
NWS Phoenix, AZ issued this special weather statement at Jul 21, 2021, 10:11 PM MST for Pinal County, Arizona. It was in force for 49 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 21, 2021, 10:11 PM MST (05:11 UTC)
- Expired
- Jul 21, 2021, 11:00 PM MST
- In force
- 49 min
- Issued by
- NWS Phoenix, AZ
County Pinal County, AZ
The radar
The Phoenix radar (KIWA), 44 km from the middle of the area, began a volume at 05:11 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, 5.2 hours before the alert went out and 76 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
- 760 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 3156 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -21 m²/s²
- 0-3 km storm-relative helicity
- 10 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted.
716
WWUS85 KPSR 220511
SPSPSR
Special Weather Statement
National Weather Service Phoenix AZ
1011 PM MST Wed Jul 21 2021
AZZ552-553-555-220600-
Northwest Pinal County AZ-Apache Junction/Gold Canyon AZ-Superior AZ-
1011 PM MST Wed Jul 21 2021
...SIGNIFICANT WEATHER ADVISORY FOR PINAL COUNTY UNTIL 1100 PM MST...
At 1011 PM MST, Doppler radar was tracking a strong thunderstorm 7
miles south of Boyce Thompson Arboretum, or 9 miles southwest of
Superior, moving west at 10 mph.
Wind gusts up to 50 mph will be possible with this storm.
Locations impacted include...
Florence, Florence Junction, Queen Valley, Boyce Thompson Arboretum,
Gold Camp and Valley Farms.
This includes the following highways...
US Highway 60 between mile markers 205 and 223.
AZ Route 79 between mile markers 129 and 150.
AZ Route 177 between mile markers 163 and 165.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 3315 11109 3300 11130 3297 11135 3296 11150
3339 11142 3325 11107 3323 11107
TIME...MOT...LOC 0511Z 086DEG 7KT 3317 11119
$$
CKThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 5:37 PM MST | Special Weather Statement | PSR | Yuma | 38 min |
| Jul 21, 5:41 PM MST | Special Weather Statement | PSR | 49 min | |
| Jul 21, 6:18 PM MST | Severe Thunderstorm Warning | PSR | La Paz, Yuma | 42 min |
| Jul 21, 6:20 PM MST | Special Weather Statement | PSR | Gila | 40 min |
| Jul 21, 6:47 PM MST | Special Weather Statement | PSR | 43 min | |
| Jul 21, 6:59 PM MST | Special Weather Statement | PSR | Yuma | 46 min |
| Jul 21, 7:06 PM MST | Areal Flood Advisory | PSR | Gila | 3 hr |
| Jul 21, 7:10 PM MST | Special Weather Statement | PSR | La Paz | 50 min |
| Jul 21, 7:17 PM MST | Areal Flood Advisory | PSR | Yuma | 44 min |
| Jul 21, 7:40 PM MST | Dust Storm Warning | PSR | Yuma | 35 min |
| Jul 21, 8:01 PM MST | Flash Flood Warning | PSR | Yuma | 4 hr |
| Jul 21, 8:13 PM MST | Dust Storm Advisory | PSR | Yuma | 47 min |
| Jul 21, 9:06 PM MST | Dust Storm Advisory | PSR | Maricopa, Pinal | 39 min |
| Jul 21, 10:06 PM MST | Dust Storm Advisory | PSR | Maricopa, Pinal | 39 min |
| Jul 21, 10:23 PM MST | Special Weather Statement | PSR | Maricopa | 37 min |
| Jul 21, 10:25 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 16 min |
| Jul 21, 10:39 PM MST | Special Weather Statement | PSR | 36 min | |
| Jul 21, 10:51 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 24 min |
| Jul 21, 11:12 PM MST | Special Weather Statement | PSR | 48 min | |
| Jul 21, 11:15 PM MST | Special Weather Statement | PSR | Pinal | 45 min |
| Jul 22, 12:28 AM MST | Flash Flood Warning | PSR | Maricopa | 4 hr |
| Jul 22, 12:32 AM MST | Areal Flood Advisory | PSR | Maricopa | 118 min |
| Jul 22, 3:06 PM MST | Special Weather Statement | PSR | 54 min | |
| Jul 22, 3:43 PM MST | Special Weather Statement | PSR | Maricopa | 47 min |
| Jul 22, 3:58 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 33 min |
| Jul 22, 4:30 PM MST | Dust Storm Advisory | PSR | Yuma | 41 min |
| Jul 22, 4:53 PM MST | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Jul 22, 4:00 PM MST | Special Weather Statement | PSR | Imperial | 60 min |
| Jul 22, 4:40 PM MST | Areal Flood Advisory | PSR | Imperial | 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.