Alert archive / Arizona / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 33, NWS Las Vegas, NV

August 3, 2012Mohave County, Arizona

NWS Las Vegas, NV issued this severe thunderstorm warning at Aug 3, 2012, 9:09 PM MST for Mohave County, Arizona. It was in force for 51 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 3, 2012, 9:09 PM MST (04:09 UTC)
Expired
Aug 3, 2012, 10:00 PM MST
In force
51 min
Issued by
NWS Las Vegas, NV
Area
Storm-based polygon

County Mohave County, AZ

The radar

The Las Vegas radar (KESX), 104 km from the middle of the area, began a volume at 04:12 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 00:00Z, 4.2 hours before the alert went out and 168 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-pSkew-T log-p diagram, Las Vegas, NV at 00:00Z on 2012-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 35 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Las Vegas, NV at 00:00Z on 2012-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
35 J/kg
Mixed-layer CIN
-98 J/kg
Mixed-layer LCL
3971 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
10 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.

252 
WUUS55 KVEF 040409
SVRVEF
AZC015-040500-
/O.NEW.KVEF.SV.W.0033.120804T0409Z-120804T0500Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
909 PM MST FRI AUG 3 2012

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

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

* UNTIL 1000 PM MST.

* AT 903 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 7 MILES SOUTH OF GRAND CANYON   
SKYWALK...AND WAS MOVING WEST AT 15   MPH.

* LOCATIONS IMPACTED INCLUDE...BRAND CANYON SKYWALK...GRAND CANYON 
RANCH...AND BUCK AND DOW AND DIAMOND BAR ROADS.

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 BY USING THE TWITTER
HASHTAG...NWSVEGAS.

&&

LAT...LON 3579 11365 3584 11403 3609 11391 3594 11358
TIME...MOT...LOC 0408Z 105DEG 24KT 3592 11385

$$
KENNEDY
2 follow-up statements
321 
WWUS55 KVEF 040427
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
927 PM MST FRI AUG 3 2012

AZC015-040500-
/O.CON.KVEF.SV.W.0033.000000T0000Z-120804T0500Z/
MOHAVE AZ-
927 PM MST FRI AUG 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM MST
FOR CENTRAL MOHAVE COUNTY...

AT 920 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 65 MPH.  THIS STORM WAS LOCATED JUST EAST OF GRAND CANYON 
RANCH AND WILL PASS DIRECTLY OVER GRAND CANYON RANCH. THIS DANGEROUS 
STORM IS MOVING WEST AT 20 MPH.

LOCATIONS IMPACTED INCLUDE...LOCATIONS IMPACTED INCLUDE...GRAND 
CANYON RANCH...BUCK AND DOW AND DIAMOND BAR ROADS...AND THE GRAND 
CANYON SKYWALK.

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 BY USING THE TWITTER
HASHTAG...NWSVEGAS.

&&

LAT...LON 3579 11365 3584 11403 3609 11391 3594 11358
TIME...MOT...LOC 0423Z 105DEG 24KT 3595 11397

$$

KENNEDY
968 
WWUS55 KVEF 040500
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1000 PM MST FRI AUG 3 2012

AZC015-040503-
/O.EXP.KVEF.SV.W.0033.000000T0000Z-120804T0500Z/
MOHAVE AZ-
1000 PM MST FRI AUG 3 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MOHAVE COUNTY NEAR 
GRAND CANYON RANCH WILL EXPIRE AT 1000 PM MST.

ALTHOUGH THERE IS NO LONGER A THREAT OF SEVERE WEATHER WITH WINDS IN 
EXCESS OF 65 MPH...WINDS WILL LIKELY REMAIN GUSTY THROUGH 1030 
PM...ALONG WITH LIGHT TO MODERATE RAIN SHOWERS AND INTERMITTENT 
LIGHTNING NEAR GRAND CANYON RANCH AND GRAND CANYON SKYWALK.

LAT...LON 3579 11365 3584 11403 3609 11391 3594 11358
TIME...MOT...LOC 0453Z 105DEG 24KT 3600 11421

$$

KENNEDY

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 5:38 PM MSTSevere Thunderstorm WarningVEFMohave37 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2012Every severe thunderstorm warning in 2012

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.