Alert archive / Arizona / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 113, NWS Las Vegas, NV

July 31, 2011Mohave County, Arizona

NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 31, 2011, 3:23 PM MST for Mohave County, Arizona. It was in force for 39 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 31, 2011, 3:23 PM MST (22:23 UTC)
Expired: Jul 31, 2011, 4:02 PM MST
In force: 39 min
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon

County Mohave County, AZ

The radar

The Las Vegas radar (KESX), 72 km from the middle of the area, began a volume at 22:25 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

Las Vegas, NV (KVEF), launched 12:00Z, 10.4 hours before the alert went out and 155 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: 8 J/kg
Mixed-layer CIN: -233 J/kg
Mixed-layer LCL: 2632 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 20 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.

367 
WUUS55 KVEF 312223
SVRVEF
AZC015-312315-
/O.NEW.KVEF.SV.W.0113.110731T2223Z-110731T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
323 PM MST SUN JUL 31 2011

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL MOHAVE COUNTY IN NORTHWEST ARIZONA...

* UNTIL 415 PM MST.

* AT 320 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED OVER
  CENTRAL MOHAVE COUNTY...OR 22 MILES NORTH OF KINGMAN...AND MOVING
  NORTH AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF THE
  INDICATED COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM IS CAPABLE OF PRODUCING DAMAGING WINDS WHICH CAN BRING
DOWN TREES AND POWER LINES AND CAUSE SIGNIFICANT BLOWING DUST AND
DEBRIS. IN ADDITION...HAIL AND LIGHTNING ARE LIKELY. LIGHTNING CAN
KILL! TAKE COVER IN A SUBSTANTIAL SHELTER AND STAY AWAY FROM WINDOWS
UNTIL THE STORM PASSES.

REPORT SEVERE WEATHER BY POSTING YOUR REPORT TO THE LAS VEGAS
NATIONAL WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS.

&&

LAT...LON 3574 11420 3569 11392 3544 11401 3543 11416
TIME...MOT...LOC 2224Z 186DEG 21KT 3555 11405

$$
KENNEDY

1 follow-up statement

252 
WWUS55 KVEF 312302
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
402 PM MST SUN JUL 31 2011

AZC015-312311-
/O.CAN.KVEF.SV.W.0113.000000T0000Z-110731T2315Z/
MOHAVE AZ-
402 PM MST SUN JUL 31 2011

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MOHAVE COUNTY IS
CANCELLED...

THUNDERSTORMS NORTH OF CHLORIDE AND WEST OF DOLAN SPRINGS HAVE 
WEAKENED TO BELOW SEVERE LEVELS AT THIS TIME. THEREFORE THE SEVERE 
THUNDERSTORM WARNING FOR THIS AREA WILL BE CANCELLED.

LAT...LON 3574 11420 3569 11392 3544 11401 3543 11416
TIME...MOT...LOC 2301Z 186DEG 21KT 3577 11402

$$

KENNEDY

The office that day

Everything else NWS Las Vegas, NV issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 30, 5:46 PM MST	Areal Flood Advisory	VEF	Mohave	89 min
Jul 31, 12:27 PM MST	Areal Flood Advisory	VEF	Mohave	93 min
Jul 31, 3:14 PM MST	Areal Flood Advisory	VEF	Mohave	3 hr
Jul 31, 3:19 PM MST	Severe Thunderstorm Warning	VEF	Mohave	41 min
Jul 31, 3:57 PM MST	Severe Thunderstorm Warning	VEF	Mohave	48 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2011 Every severe thunderstorm warning in 2011

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.