Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 103, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Sep 5, 2021, 5:04 PM MST for Gila County, Pinal County, Arizona. It was in force for 41 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
- Sep 5, 2021, 5:04 PM MST (00:04 UTC)
- Expired
- Sep 5, 2021, 5:45 PM MST
- In force
- 41 min
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Gila County, AZ, Pinal County, AZ
The radar
The Phoenix radar (KIWA), 86 km from the middle of the area, began a volume at 00:04 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, 0.1 hours before the alert went out and 117 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
- 48 J/kg
- Mixed-layer CIN
- -147 J/kg
- Mixed-layer LCL
- 3562 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
670
WUUS55 KPSR 060004
SVRPSR
AZC007-021-060045-
/O.NEW.KPSR.SV.W.0103.210906T0004Z-210906T0045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Phoenix AZ
504 PM MST Sun Sep 5 2021
The National Weather Service in Phoenix has issued a
* Severe Thunderstorm Warning for...
Gila County in east central Arizona...
Pinal County in southeastern Arizona...
* Until 545 PM MST.
* At 504 PM MST, severe thunderstorms were located along a line
extending from 9 miles southeast of Superior to near Christmas,
moving south at 30 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Hayden and Christmas.
This includes the following highways...
AZ Route 77 between mile markers 135 and 141, near mile marker 143,
and between mile markers 146 and 159.
AZ Route 177 between mile markers 137 and 162.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3314 11059 3315 11063 3308 11070 3307 11073
3304 11072 3299 11077 3299 11079 3324 11094
3315 11110 3329 11104 3317 11055
TIME...MOT...LOC 0004Z 019DEG 27KT 3317 11103 3303 11073
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Iniguez1 follow-up statement
010
WWUS55 KPSR 060036
SVSPSR
Severe Weather Statement
National Weather Service Phoenix AZ
536 PM MST Sun Sep 5 2021
AZC007-021-060045-
/O.EXP.KPSR.SV.W.0103.000000T0000Z-210906T0045Z/
Gila AZ-Pinal AZ-
536 PM MST Sun Sep 5 2021
...THE SEVERE THUNDERSTORM WARNING FOR GILA AND PINAL COUNTIES WILL
EXPIRE AT 545 PM MST...
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire. However gusty winds are still possible with
these thunderstorms.
LAT...LON 3314 11059 3315 11063 3308 11070 3307 11073
3304 11072 3299 11077 3299 11079 3324 11094
3315 11110 3329 11104 3317 11055
TIME...MOT...LOC 0035Z 019DEG 27KT 3296 11112 3282 11082
$$
SDBThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 5:36 PM MST | Flash Flood Warning | PSR | Gila | 4 hr |
| Sep 5, 5:43 PM MST | Dust Storm Advisory | PSR | Maricopa, Pinal | 89 min |
| Sep 6, 12:12 PM MST | Excessive Heat Warning | PSR | La Paz, Maricopa | 3 days |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.