Alert archive / Arizona / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 21, NWS Phoenix, AZ

July 19, 2009La Paz County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 19, 2009, 7:20 PM MST for La Paz County, Arizona. It was in force for 70 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 19, 2009, 7:20 PM MST (02:20 UTC)
Expired: Jul 19, 2009, 8:30 PM MST
In force: 70 min
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon

County La Paz County, AZ

The radar

The Yuma radar (KYUX), 155 km from the middle of the area, began a volume at 02:23 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, 2.3 hours before the alert went out and 183 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: 57 J/kg
Mixed-layer CIN: -109 J/kg
Mixed-layer LCL: 3770 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 41 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.

000 
WUUS55 KPSR 200220
SVRPSR
AZC012-200330-
/O.NEW.KPSR.SV.W.0021.090720T0220Z-090720T0330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
720 PM MST SUN JUL 19 2009

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL LA PAZ COUNTY IN WEST CENTRAL ARIZONA...

* UNTIL 830 PM MST

* AT 718 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  IN ADDITION...DENSE BLOWING DUST MAY ACCOMPANY THIS
  SEVERE STORM.  THIS STORM WAS LOCATED NEAR VICKSBURG JUNCTION...OR
  39 MILES SOUTHEAST OF PARKER...AND MOVING NORTH AT 10 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO      
  BRENDA AND HIGHWAY 60 NEAR VICKSBURG JUNCTION. 

LAT...LON 3371 11405 3384 11412 3395 11372 3366 11360
      3360 11393
TIME...MOT...LOC 0219Z 146DEG 3KT 3372 11381

$$

CJB

2 follow-up statements

000 
WWUS55 KPSR 200257
SVSPSR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
757 PM MST SUN JUL 19 2009

AZC012-200330-
/O.CON.KPSR.SV.W.0021.000000T0000Z-090720T0330Z/
LA PAZ AZ-
757 PM MST SUN JUL 19 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM MST
FOR CENTRAL LA PAZ COUNTY...

AT 754 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES WEST OF
VICKSBURG...OR 37 MILES SOUTHEAST OF PARKER...MOVING NORTHWEST AT 5 
MPH. NO SEVERE WEATHER REPORTED HAVE BEEN RECEIVED WITH THIS STORM 
SO FAR.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BRENDA
AND STATE ROUTE 60 NEAR VICKSBURG JCT.

LAT...LON 3371 11405 3384 11412 3395 11372 3366 11360
      3360 11393
TIME...MOT...LOC 0256Z 146DEG 3KT 3375 11383

$$

CJB

000 
WWUS55 KPSR 200339
SVSPSR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
839 PM MST SUN JUL 19 2009

AZC012-200349-
/O.EXP.KPSR.SV.W.0021.000000T0000Z-090720T0330Z/
LA PAZ AZ-
839 PM MST SUN JUL 19 2009

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL LA PAZ COUNTY HAS
EXPIRED...

THE THUNDERSTORM OVER CENTRAL LA PAZ COUNTY...IN THE VICINITY OF 
VICKSBURG AND BRENDA...HAD WEAKENED TO BELOW SEVERE LIMITS AND THUS 
THE WARNING WAS ALLOWED TO EXPIRE.

LAT...LON 3371 11405 3384 11412 3395 11372 3366 11360
      3360 11393
TIME...MOT...LOC 0257Z 146DEG 3KT 3375 11383

$$

CJB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 5:20 PM MST	Severe Thunderstorm Warning	PSR	La Paz	55 min
Jul 19, 6:06 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	54 min
Jul 19, 6:20 PM MST	Severe Thunderstorm Warning	PSR	La Paz	55 min
Jul 19, 6:51 PM MST	Special Weather Statement	PSR		54 min
Jul 19, 6:58 PM MST	Areal Flood Advisory	PSR	La Paz	107 min
Jul 19, 7:09 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	66 min
Jul 19, 7:35 PM MST	Dust Storm Warning	PSR		85 min
Jul 19, 7:39 PM MST	Areal Flood Advisory	PSR	Maricopa	111 min
Jul 19, 8:04 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	56 min
Jul 19, 8:48 PM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	117 min
Jul 19, 10:03 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	57 min
Jul 19, 10:49 PM MST	Areal Flood Advisory	PSR	Maricopa	116 min
Jul 19, 11:25 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa	65 min
Jul 20, 12:31 AM MST	Areal Flood Advisory	PSR	Gila, Maricopa	119 min
Jul 20, 2:10 AM MST	Areal Flood Advisory	PSR	Gila, Maricopa	3 hr
Jul 20, 4:48 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Maricopa	42 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2009 Every severe thunderstorm warning in 2009

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.