Alert archive / Arizona / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 21, NWS Phoenix, AZ

July 29, 2003La Paz County, Maricopa County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 29, 2003, 5:44 PM MST for La Paz County, Maricopa County, Arizona. It was in force for 31 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 29, 2003, 5:44 PM MST (00:44 UTC)
Expired: Jul 29, 2003, 6:15 PM MST
In force: 31 min
Issued by: NWS Phoenix, AZ
Area: Counties, with a storm outline in the text

Counties La Paz County, AZ, Maricopa County, AZ

The radar

The Phoenix radar (KIWA), 163 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 29, 4:00 PM MST	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Phoenix, AZ (KPSR), launched 00:00Z, 0.7 hours before the alert went out and 132 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: 523 J/kg
Mixed-layer CIN: -98 J/kg
Mixed-layer LCL: 2122 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WUUS55 KPSR 300044
SVRPSR
AZC012-013-300115-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
530 PM MST TUE JUL 29 2003

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN MARICOPA COUNTY IN SOUTH CENTRAL ARIZONA
  EXTREME EAST CENTRAL LA PAZ COUNTY IN WEST CENTRAL ARIZONA

* UNTIL 615 PM MST

* AT 523 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  A SEVERE THUNDERSTORM ABOUT 27 MILES WEST OF WICKENBURG...MOVING
  WEST AT 15 MPH.

  THE WARNING INCLUDES THE COMMUNITIES OF AGUILA...GLADEN...AND
  PORTIONS OF HIGHWAY 60 TOWARD WENDEN.

DAMAGING MICROBURST WINDS ARE LIKELY WITH THIS STORM. VERY HEAVY RAIN
IS ALSO POSSIBLE. TAKE COVER IN A SUBSTANTIAL SHELTER UNTIL THE STORM
PASSES.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE
FOR DAMAGING WIND...LARGE HAIL...AND DEADLY LIGHTNING. PEOPLE OUTSIDE
SHOULD TAKE SHELTER...PREFERABLY IN A STRONG BUILDING AWAY FROM
WINDOWS.

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM MST
TUESDAY EVENING FOR SOUTHWESTERN ARIZONA.

LAT...LON 3389 11339 3379 11320 3399 11305 3400 11331

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 5:33 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Maricopa	42 min
Jul 29, 6:02 PM MST	Severe Thunderstorm Warning	PSR	Gila	28 min
Jul 29, 6:15 PM MST	Severe Thunderstorm Warning	PSR	La Paz	45 min
Jul 29, 7:03 PM MST	Severe Thunderstorm Warning	PSR	La Paz	42 min
Jul 29, 7:31 PM MST	Severe Thunderstorm Warning	PSR	Pinal	44 min
Jul 29, 7:56 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	64 min
Jul 29, 9:04 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	41 min
Jul 30, 4:17 PM MST	Severe Thunderstorm Warning	PSR	Gila	43 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2003 Every severe thunderstorm warning in 2003

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.