Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 87, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 16, 2021, 10:14 PM MST for Gila County, Maricopa County, Pinal County, Arizona. It was in force for 46 min. 16 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 16, 2021, 10:14 PM MST (05:14 UTC)
- Expired
- Aug 16, 2021, 11:00 PM MST
- In force
- 46 min
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Hail
- 1.0 in
- Wind
- 70.0 mph
Counties Gila County, AZ, Maricopa County, AZ, Pinal County, AZ
The radar
The Phoenix radar (KIWA), 24 km from the middle of the area, began a volume at 05:14 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 16, 10:20 PM MST | TSTM WND DMG | 4 Nnw Florence Junction, AZ | MATURE LEMON TREE UPROOTED AND SOME LAWN FURNITURE DAMAGED/DISPLACED. MOSTLY SMALLER TREES PULLED OUT OF THE GROUND OR BROKEN - LIMBS. 8 TO 10 TREES. TWO MATURE OCOTILLOS WERE UPROOTED AND ONE OLDER SAGUARO PULLED OUT OF THE GROUND. TIME ESTIMATED FROM RADAR. |
| Aug 16, 10:40 PM MST | TSTM WND GST 73 | 10 Ese Queen Creek, AZ | SRP MESONET STATION QUAIL. |
| Aug 16, 10:41 PM MST | HAIL 0.75 | 10 N Fountain Hills, AZ | DELAYED REPORT. HAILSTONES UP TO 3/4 INCH IN DIAMETER REPORTED NEAR 150TH ST. AND RIO VERDE DRIVE. |
| Aug 16, 10:46 PM MST | TSTM WND GST 54 | 5 Nw East Mesa, AZ | *** DELAYED REPORT ** MESONET STATION SRP FALCON SUBSTATION. |
| Aug 16, 10:50 PM MST | TSTM WND DMG | 6 Se Queen Creek, AZ | *** DELAYED REPORT *** MULTIPLE REPORTS OF TREES DOWN AND A TRAMPOLINE ALONG HUNT HWY. BETWEEN GARY RD. AND BELLA VISTA RD. A FENCE WAS DESTROYED BY A DOWNED TREE NEAR HUNT HWY. AND GANTZEL RD. TIME ESTIMATED FROM RADAR. |
| Aug 16, 10:50 PM MST | TSTM WND DMG | 8 Wnw Florence, AZ | *** DELAYED REPORT *** ONE LARGE TREE ABOUT 4 FEET IN DIAMETER UPROOTED NEAR OASIS LN AND HUNT HWY. TIME ESTIMATED FROM RADAR. |
| Aug 16, 10:53 PM MST | TSTM WND GST 52 | 3 Ene Deer Valley, AZ | *** DELAYED REPORT *** ASOS STATION KDVT PHOENIX DEER VALLEY. |
| Aug 16, 10:53 PM MST | TSTM WND GST 69 | Sky Harbor Airport, AZ | ASOS STATION KPHX PHOENIX SKY HRBR. |
| Aug 16, 10:55 PM MST | TSTM WND GST 68 | 1 S Tempe, AZ | *** DELAYED REPORT *** MEASURED FROM HANDHELD ANEMOMETER. |
| Aug 16, 10:55 PM MST | TSTM WND GST 68 | 1 S Tempe, AZ | |
| Aug 16, 10:56 PM MST | TSTM WND GST 59 | 9 Se Queen Creek, AZ | |
| Aug 16, 11:00 PM MST | TSTM WND DMG | 4 Ne Sun Lakes, AZ | *** DELAYED REPORT *** PHOTO FROM SOCIAL MEDIA SHOWS MULTIPLE TREES UPROOTED (MOSTLY PALO VERDE) ACROSS THE COOPER RD. BETWEEN OCOTILLO RD. AND QUEEN CREEK RD. TIME ESTIMATED FROM RADAR. |
| Aug 16, 11:00 PM MST | HAIL 0.5 | 2 Nnw Queen Creek, AZ | *** DELAYED REPORT ***. |
| Aug 16, 11:05 PM MST | TSTM WND DMG | 3 E Chandler, AZ | *** DELAYED REPORT *** PHOTO FROM SOCIAL MEDIA SHOWS MULTIPLE TREES DOWN INCLUDING ONE LARGE TREE BLOCKING ROADWAY REQUIRING REMOVAL BY LARGE PICKUP TRUCK. |
| Aug 16, 11:08 PM MST | TSTM WND DMG | 2 Nne Sun Lakes, AZ | *** DELAYED REPORT *** SIX-INCH DIAMETER TREE LIMB BROKEN OFF PALO VERDE TREE. |
| Aug 16, 11:10 PM MST | TSTM WND DMG | 5 E Glendale, AZ | *** DELAYED REPORT *** PHOTO FROM SOCIAL MEDIA SHOWS LARGE TREE UPROOTED. TIME ESTIMATED USING RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 16, 3:54 PM MST | Severe Thunderstorm Watch | SPC | 10 hr |
The nearest sounding before it
Phoenix, AZ (KPSR), launched 00:00Z, 5.2 hours before the alert went out and 40 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
- 2667 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1942 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
090
WUUS55 KPSR 170514
SVRPSR
AZC007-013-021-170600-
/O.NEW.KPSR.SV.W.0087.210817T0514Z-210817T0600Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Phoenix AZ
1014 PM MST Mon Aug 16 2021
The National Weather Service in Phoenix has issued a
* Severe Thunderstorm Warning for...
Gila County in east central Arizona...
Maricopa County in south central Arizona...
Pinal County in southeastern Arizona...
* Until 1100 PM MST.
* At 1014 PM MST, severe thunderstorms were located along a line
extending from near Camp Creek to near Rio Verde to near Apache
Junction to near Gold Canyon to near Superior, moving southwest at
30 mph.
HAZARD...70 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect considerable
tree damage. Wind damage is also likely to mobile homes,
roofs, and outbuildings.
* Locations impacted include...
Phoenix, Mesa, Chandler, Glendale, Scottsdale, Gilbert, Tempe,
Apache Junction, Florence, Fountain Hills, Paradise Valley,
Coolidge, Superior, East Mesa and Sunflower.
This includes the following highways...
AZ Interstate 10 between mile markers 143 and 185.
AZ Interstate 17 between mile markers 195 and 241.
AZ Route 51 between mile markers 1 and 15.
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 these storms. 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 these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3400 11163 3385 11143 3357 11134 3345 11120
3325 11088 3321 11092 3324 11094 3290 11144
3300 11176 3309 11194 3336 11209 3371 11222
3405 11215
TIME...MOT...LOC 0514Z 044DEG 25KT 3391 11177 3372 11160 3340 11159
3331 11141 3320 11108
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
SDBThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 5:15 PM MST | Special Weather Statement | PSR | Gila | 45 min |
| Aug 16, 5:46 PM MST | Special Weather Statement | PSR | 44 min | |
| Aug 16, 6:07 PM MST | Special Weather Statement | PSR | Gila | 38 min |
| Aug 16, 6:14 PM MST | Severe Thunderstorm Warning | PSR | Gila | 46 min |
| Aug 16, 6:37 PM MST | Special Weather Statement | PSR | Pinal | 53 min |
| Aug 16, 6:55 PM MST | Flash Flood Warning | PSR | Gila | 6 hr |
| Aug 16, 8:24 PM MST | Special Weather Statement | PSR | 51 min | |
| Aug 16, 8:41 PM MST | Flash Flood Warning | PSR | Maricopa | 5 hr |
| Aug 16, 8:53 PM MST | Special Weather Statement | PSR | Gila | 52 min |
| Aug 16, 9:08 PM MST | Special Weather Statement | PSR | Gila | 52 min |
| Aug 16, 9:22 PM MST | Severe Thunderstorm Warning | PSR | Gila, Maricopa, Pinal | 38 min |
| Aug 16, 9:41 PM MST | Severe Thunderstorm Warning | PSR | Gila, Maricopa, Pinal | 49 min |
| Aug 16, 9:49 PM MST | Severe Thunderstorm Warning | PSR | Gila, Maricopa | 41 min |
| Aug 16, 10:01 PM MST | Flash Flood Warning | PSR | Gila | 4 hr |
| Aug 16, 10:01 PM MST | Special Weather Statement | PSR | 44 min | |
| Aug 16, 10:05 PM MST | Flash Flood Warning | PSR | Gila | 4 hr |
| Aug 16, 10:22 PM MST | Flash Flood Warning | PSR | Gila | 10 hr |
| Aug 16, 10:28 PM MST | Flash Flood Warning | PSR | Gila, Maricopa, Pinal | 10 hr |
| Aug 16, 10:36 PM MST | Flash Flood Warning | PSR | Gila, Maricopa | 10 hr |
| Aug 16, 10:38 PM MST | Dust Storm Advisory | PSR | Maricopa, Pinal | 67 min |
| Aug 16, 10:48 PM MST | Flash Flood Warning | PSR | Maricopa, Pinal | 9 hr |
| Aug 16, 10:54 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 51 min |
| Aug 16, 10:58 PM MST | Flash Flood Warning | PSR | Maricopa | 7 hr |
| Aug 16, 11:04 PM MST | Dust Storm Warning | PSR | Maricopa, Pinal | 56 min |
| Aug 16, 11:07 PM MST | Flash Flood Warning | PSR | Maricopa, Pinal | 7 hr |
| Aug 16, 11:16 PM MST | Flash Flood Warning | PSR | Maricopa | 7 hr |
| Aug 16, 11:26 PM MST | Flash Flood Warning | PSR | Maricopa, Pinal | 8 hr |
| Aug 16, 11:31 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 44 min |
| Aug 16, 11:41 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 49 min |
| Aug 16, 11:47 PM MST | Dust Storm Warning | PSR | Maricopa | 58 min |
| Aug 16, 11:50 PM MST | Special Weather Statement | PSR | 40 min | |
| Aug 16, 11:52 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 38 min |
| Aug 16, 11:56 PM MST | Flash Flood Warning | PSR | Pinal | 7 hr |
| Aug 16, 11:59 PM MST | Flash Flood Warning | PSR | Maricopa | 6 hr |
| Aug 17, 12:01 AM MST | Dust Storm Warning | PSR | Maricopa, Pinal | 59 min |
| Aug 17, 12:09 AM MST | Flash Flood Warning | PSR | Maricopa, Pinal | 8 hr |
| Aug 17, 12:32 AM MST | Special Weather Statement | PSR | 43 min | |
| Aug 17, 12:36 AM MST | Special Weather Statement | PSR | Maricopa | 24 min |
| Aug 17, 4:05 AM MST | Areal Flood Advisory | PSR | Maricopa | 4 hr |
| Aug 17, 4:26 AM MST | Flash Flood Warning | PSR | Maricopa | 6 hr |
| Aug 17, 5:29 AM MST | Special Weather Statement | PSR | Maricopa | 76 min |
| Aug 17, 5:35 AM MST | Flash Flood Warning | PSR | Maricopa | 6 hr |
| Aug 17, 6:26 AM MST | Flash Flood Warning | PSR | Gila, Pinal | 5 hr |
| Aug 17, 8:42 AM MST | Areal Flood Warning | PSR | Gila | 5 days |
| Aug 17, 4:46 PM MST | Special Weather Statement | PSR | 44 min |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.