Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 80, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 15, 2021, 11:44 PM MST for Maricopa County, Arizona. It was in force for 32 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 15, 2021, 11:44 PM MST (06:44 UTC)
- Expired
- Aug 16, 2021, 12:16 AM MST
- In force
- 32 min
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Maricopa County, AZ
The radar
The Phoenix radar (KIWA), 47 km from the middle of the area, began a volume at 06:43 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, 6.7 hours before the alert went out and 20 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
- 1548 J/kg
- Mixed-layer CIN
- -94 J/kg
- Mixed-layer LCL
- 2123 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- -22 m²/s²
- 0-3 km storm-relative helicity
- 56 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
497
WUUS55 KPSR 160644
SVRPSR
AZC013-160730-
/O.NEW.KPSR.SV.W.0080.210816T0644Z-210816T0730Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Phoenix AZ
1144 PM MST Sun Aug 15 2021
The National Weather Service in Phoenix has issued a
* Severe Thunderstorm Warning for...
Maricopa County in south central Arizona...
* Until 1230 AM MST.
* At 1143 PM MST, a severe thunderstorm was located over Laveen,
moving southwest at 5 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Phoenix, Glendale, Avondale, Tolleson, Laveen, Cashion, Phoenix
International Raceway, Downtown Phoenix, South Phoenix, Arizona
State Fairgrounds and Komatke.
This includes the following highways...
AZ Interstate 10 between mile markers 131 and 146, and between mile
markers 149 and 150.
AZ Interstate 17 between mile markers 195 and 202.
US Highway 60 between mile markers 157 and 160.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3344 11202 3332 11211 3328 11219 3331 11220
3329 11220 3329 11221 3342 11239 3354 11220
TIME...MOT...LOC 0643Z 040DEG 6KT 3345 11217
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
SDB1 follow-up statement
014
WWUS55 KPSR 160716
SVSPSR
Severe Weather Statement
National Weather Service Phoenix AZ
1216 AM MST Mon Aug 16 2021
AZC013-160726-
/O.CAN.KPSR.SV.W.0080.000000T0000Z-210816T0730Z/
Maricopa AZ-
1216 AM MST Mon Aug 16 2021
...THE SEVERE THUNDERSTORM WARNING FOR MARICOPA COUNTY IS
CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds and
heavy rain are still possible with this thunderstorm.
LAT...LON 3344 11202 3332 11211 3328 11219 3331 11220
3329 11220 3329 11221 3342 11239 3354 11220
TIME...MOT...LOC 0710Z 040DEG 6KT 3341 11221
$$
SDBThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 7:49 PM MST | Special Weather Statement | PSR | Gila | 56 min |
| Aug 15, 8:26 PM MST | Severe Thunderstorm Warning | PSR | Gila | 49 min |
| Aug 15, 9:14 PM MST | Severe Thunderstorm Warning | PSR | Gila, Maricopa, Pinal | 46 min |
| Aug 15, 9:18 PM MST | Special Weather Statement | PSR | Gila | 42 min |
| Aug 15, 9:58 PM MST | Severe Thunderstorm Warning | PSR | Gila, Maricopa, Pinal | 47 min |
| Aug 15, 10:14 PM MST | Flash Flood Warning | PSR | Gila | 4 hr |
| Aug 15, 10:31 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 44 min |
| Aug 15, 10:45 PM MST | Special Weather Statement | PSR | Pinal | 45 min |
| Aug 15, 10:50 PM MST | Flash Flood Warning | PSR | Gila, Maricopa, Pinal | 6 hr |
| Aug 15, 10:55 PM MST | Dust Storm Advisory | PSR | Maricopa, Pinal | 65 min |
| Aug 15, 10:58 PM MST | Areal Flood Advisory | PSR | Maricopa, Pinal | 3 hr |
| Aug 15, 11:14 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 46 min |
| Aug 15, 11:31 PM MST | Special Weather Statement | PSR | Maricopa | 44 min |
| Aug 15, 11:37 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 38 min |
| Aug 15, 11:45 PM MST | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Aug 16, 12:18 AM MST | Special Weather Statement | PSR | 42 min | |
| Aug 16, 12:49 AM MST | Severe Thunderstorm Warning | PSR | La Paz, Maricopa | 56 min |
| Aug 16, 1:33 AM MST | Flash Flood Warning | PSR | La Paz, Maricopa | 6 hr |
| Aug 16, 1:47 AM MST | Special Weather Statement | PSR | La Paz | 58 min |
| Aug 16, 1:54 AM MST | Severe Thunderstorm Warning | PSR | La Paz | 66 min |
| Aug 16, 2:22 AM MST | Special Weather Statement | PSR | La Paz | 68 min |
| Aug 16, 2:53 AM MST | Flash Flood Warning | PSR | La Paz | 5 hr |
| Aug 16, 3:08 AM MST | Dust Storm Advisory | PSR | La Paz, Yuma | 2 hr |
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.