Alert archive / Arizona / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 21, NWS Phoenix, AZ

August 16, 2013Maricopa County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 16, 2013, 4:30 PM MST for Maricopa County, Arizona. It was in force for 60 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 16, 2013, 4:30 PM MST (23:30 UTC)
Expired: Aug 16, 2013, 5:30 PM MST
In force: 60 min
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon

County Maricopa County, AZ

The radar

The Phoenix radar (KIWA), 69 km from the middle of the area, began a volume at 23:32 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 12:00Z, 11.5 hours before the alert went out and 57 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: 64 J/kg
Mixed-layer CIN: -381 J/kg
Mixed-layer LCL: 3217 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 9 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

339 
WUUS55 KPSR 162330
SVRPSR
AZC013-170030-
/O.NEW.KPSR.SV.W.0021.130816T2330Z-130817T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
430 PM MST FRI AUG 16 2013

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN MARICOPA COUNTY IN SOUTH CENTRAL ARIZONA...
  THIS INCLUDES THE CITY OF FOUNTAIN HILLS...

* UNTIL 530 PM MST

* AT 423 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR CAMP CREEK...OR 15 MILES
  NORTH OF SCOTTSDALE...AND MOVING SOUTHEAST AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO   
MCDOWELL MOUNTAIN PARK...DESERT MOUNTAIN AND RIO VERDE. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS AND DEADLY CLOUD TO GROUND LIGHTNING.
MOVE TO SHELTER INSIDE A STRONG BUILDING. STAY AWAY FROM WINDOWS.

&&

LAT...LON 3401 11176 3401 11173 3384 11152 3356 11175
      3392 11193 3401 11177
TIME...MOT...LOC 2329Z 326DEG 13KT 3388 11176

$$

DEWEY

2 follow-up statements

817 
WWUS55 KPSR 162359
SVSPSR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
459 PM MST FRI AUG 16 2013

AZC013-170030-
/O.CON.KPSR.SV.W.0021.000000T0000Z-130817T0030Z/
MARICOPA AZ-
459 PM MST FRI AUG 16 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM MST
FOR NORTHEASTERN MARICOPA COUNTY...

AT 455 PM MST...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED
6 MILES NORTH OF RIO VERDE...OR 12 MILES WEST OF ROUND VALLEY...
MOVING SOUTHEAST AT 15 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
MCDOWELL MOUNTAIN PARK AND FOUNTAIN HILLS

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE.

&&

LAT...LON 3401 11176 3401 11173 3384 11152 3356 11175
      3392 11193 3401 11177
TIME...MOT...LOC 2359Z 326DEG 13KT 3379 11169

$$

DEWEY

790 
WWUS55 KPSR 170010
SVSPSR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
510 PM MST FRI AUG 16 2013

AZC013-170019-
/O.CAN.KPSR.SV.W.0021.000000T0000Z-130817T0030Z/
MARICOPA AZ-
510 PM MST FRI AUG 16 2013

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MARICOPA COUNTY
IS CANCELLED...

THE STORM NEAR CAMP CREEK AND DESERT MOUNTAIN HAS WEAKENED AND 
THEREFORE THE WARNING HAS BEEN CANCELLED EARLY.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE.

LAT...LON 3401 11176 3401 11173 3384 11152 3356 11175
      3392 11193 3401 11177
TIME...MOT...LOC 0009Z 326DEG 13KT 3376 11167

$$

DEWEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 15, 5:05 PM MST	Special Weather Statement	PSR	Pinal	40 min
Aug 15, 5:36 PM MST	Areal Flood Advisory	PSR	Gila	3 hr
Aug 16, 3:50 AM MST	Excessive Heat Warning	PSR		3 days
Aug 16, 3:13 PM MST	Special Weather Statement	PSR	Gila	47 min
Aug 16, 3:40 PM MST	Areal Flood Advisory	PSR	Gila, Maricopa	3 hr
Aug 16, 4:02 PM MST	Special Weather Statement	PSR		58 min
Aug 16, 4:04 PM MST	Special Weather Statement	PSR		56 min
Aug 16, 4:05 PM MST	Special Weather Statement	PSR		40 min
Aug 16, 4:10 PM MST	Special Weather Statement	PSR	La Paz	65 min
Aug 16, 4:18 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	57 min
Aug 16, 4:33 PM MST	Special Weather Statement	PSR	Gila	57 min
Aug 16, 4:45 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr

Nearby

Severe Thunderstorm Warnings in Arizona, 2013 Every severe thunderstorm warning in 2013

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.