Alert archive / Arizona / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 21, NWS Phoenix, AZ

July 16, 2017Pinal County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 16, 2017, 5:48 PM MST for Pinal County, Arizona. It was in force for 57 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 16, 2017, 5:48 PM MST (00:48 UTC)
Expired: Jul 16, 2017, 6:45 PM MST
In force: 57 min
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Pinal County, AZ

The radar

The Phoenix radar (KIWA), 55 km from the middle of the area, began a volume at 00:48 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, 0.8 hours before the alert went out and 84 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 629 J/kg
Mixed-layer CIN: -116 J/kg
Mixed-layer LCL: 2295 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 62 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

685 
WUUS55 KPSR 170048
SVRPSR
AZC021-170145-
/O.NEW.KPSR.SV.W.0021.170717T0048Z-170717T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Phoenix AZ
548 PM MST SUN JUL 16 2017

The National Weather Service in Phoenix has issued a

* Severe Thunderstorm Warning for...
  Pinal County in southeastern Arizona...

* Until 645 PM MST

* At 548 PM MST, a severe thunderstorm was located over Superior,
  moving southwest at 15 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations impacted include...
  Superior, Boyce Thompson Arboretum and Queen Valley. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3324 11097 3309 11118 3336 11134 3339 11109
      3325 11095
TIME...MOT...LOC 0048Z 048DEG 11KT 3327 11109 

HAIL...1.00IN
WIND...60MPH
 
$$

Hirsch

1 follow-up statement

762 
WWUS55 KPSR 170107
SVSPSR

Severe Weather Statement
National Weather Service Phoenix AZ
607 PM MST SUN JUL 16 2017

AZC021-170145-
/O.CON.KPSR.SV.W.0021.000000T0000Z-170717T0145Z/
Pinal AZ-
607 PM MST SUN JUL 16 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM MST
FOR PINAL COUNTY...

At 607 PM MST, a severe thunderstorm was located over Superior,
moving southwest at 10 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Superior, Boyce Thompson Arboretum and Queen Valley. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3324 11097 3309 11118 3336 11134 3339 11109
      3325 11095
TIME...MOT...LOC 0107Z 049DEG 11KT 3326 11112 

HAIL...1.00IN
WIND...60MPH
 
$$

Hirsch

The office that day

Everything else NWS Phoenix, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 16, 5:19 PM MST	Special Weather Statement	PSR	Pinal	56 min
Jul 16, 6:16 PM MST	Blowing Dust Advisory	PSR	Maricopa, Pinal	104 min
Jul 16, 6:36 PM MST	Special Weather Statement	PSR		39 min
Jul 16, 6:46 PM MST	Special Weather Statement	PSR	Pinal	59 min
Jul 16, 7:48 PM MST	Special Weather Statement	PSR	Pinal	57 min
Jul 16, 7:52 PM MST	Severe Thunderstorm Warning	PSR	Pinal	38 min
Jul 16, 8:12 PM MST	Special Weather Statement	PSR	Pinal	48 min
Jul 16, 9:12 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa	33 min
Jul 16, 9:35 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	25 min
Jul 16, 10:06 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	24 min
Jul 16, 10:08 PM MST	Special Weather Statement	PSR	Maricopa	52 min
Jul 16, 10:20 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	25 min
Jul 16, 10:29 PM MST	Flash Flood Warning	PSR	Maricopa, Pinal	3 hr
Jul 16, 10:33 PM MST	Special Weather Statement	PSR	Maricopa	72 min
Jul 16, 10:46 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	29 min
Jul 16, 10:53 PM MST	Dust Storm Warning	PSR	Maricopa, Pinal	88 min
Jul 16, 11:08 PM MST	Special Weather Statement	PSR	Maricopa	82 min
Jul 16, 11:25 PM MST	Flash Flood Warning	PSR	Gila	3 hr
Jul 16, 11:51 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr

Nearby

Severe Thunderstorm Warnings in Arizona, 2017 Every severe thunderstorm warning in 2017

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.