Alert archive / Arizona / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 21, NWS Las Vegas, NV

August 3, 2014Mohave County, Arizona

NWS Las Vegas, NV issued this severe thunderstorm warning at Aug 3, 2014, 5:41 PM MST for Mohave County, Arizona. It was in force for 49 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, 2014, 5:41 PM MST (00:41 UTC)
Expired
Aug 3, 2014, 6:30 PM MST
In force
49 min
Issued by
NWS Las Vegas, NV
Area
Storm-based polygon

County Mohave County, AZ

The radar

The Las Vegas radar (KESX), 108 km from the middle of the area, began a volume at 00:43 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, 0.7 hours before the alert went out and 203 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 2014-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 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 2014-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1593 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
33 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.

076 
WUUS55 KVEF 040041
SVRVEF
AZC015-040130-
/O.NEW.KVEF.SV.W.0021.140804T0041Z-140804T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
541 PM MST SUN AUG 3 2014

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

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

* UNTIL 630 PM MST.

* AT 535 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 6 MILES SOUTH OF YUCCA...AND WAS
  MOVING NORTH AT 15 MPH.

* LOCATIONS IMPACTED INCLUDE...
  YUCCA AND OATMAN.

THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 13 AND 37.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM WILL PRODUCE HIGH WINDS WHICH CAN BRING DOWN TREES AND
POWER LINES AND CAUSE BLOWING DUST. ALSO...LIGHTNING CAN KILL! TAKE
COVER IN A STURDY BUILDING AND STAY AWAY FROM WINDOWS UNTIL THE STORM
PASSES.

REPORT SEVERE WEATHER TO THE LAS VEGAS NATIONAL WEATHER SERVICE VIA
FACEBOOK OR TWITTER.

&&

LAT...LON 3504 11446 3505 11394 3465 11408 3468 11425
TIME...MOT...LOC 0041Z 161DEG 12KT 3479 11418

$$

STACHELSKI
2 follow-up statements
052 
WWUS55 KVEF 040047
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
547 PM MST SUN AUG 3 2014

AZC015-040130-
/O.CON.KVEF.SV.W.0021.000000T0000Z-140804T0130Z/
MOHAVE AZ-
547 PM MST SUN AUG 3 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM MST
FOR SOUTHWESTERN MOHAVE COUNTY...

AT 545 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE 
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS 
LOCATED NEAR YUCCA...MOVING NORTH AT 15 MPH. BE ALERT FOR BLOWING 
DUST REDUCING VISIBILITY!

LOCATIONS IMPACTED INCLUDE...
YUCCA AND OATMAN.

THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 13 AND 37.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM WILL PRODUCE HIGH WINDS WHICH CAN BRING DOWN TREES AND
POWER LINES AND CAUSE BLOWING DUST. ALSO...LIGHTNING CAN KILL! TAKE
COVER IN A STURDY BUILDING AND STAY AWAY FROM WINDOWS UNTIL THE STORM
PASSES.

REPORT SEVERE WEATHER TO THE LAS VEGAS NATIONAL WEATHER SERVICE VIA 
FACEBOOK OR TWITTER.

&&

LAT...LON 3473 11412 3468 11425 3504 11446 3505 11394
TIME...MOT...LOC 0047Z 161DEG 12KT 3481 11419

$$

STACHELSKI
294 
WWUS55 KVEF 040134
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
634 PM MST SUN AUG 3 2014

AZC015-040144-
/O.EXP.KVEF.SV.W.0021.000000T0000Z-140804T0130Z/
MOHAVE AZ-
634 PM MST SUN AUG 3 2014

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN MOHAVE COUNTY HAS
EXPIRED...

THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 13 AND 37.

THE STORM HAS WEAKENED AND DROPPED BELOW SEVERE LEVELS. THUS THE 
WARNING WAS ALLOWED TO EXPIRE.

LAT...LON 3473 11412 3468 11425 3504 11446 3505 11394
TIME...MOT...LOC 0047Z 161DEG 12KT 3481 11419

$$

STACHELSKI

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 5:07 PM MSTSevere Thunderstorm WarningVEFMohave53 min
Aug 3, 5:14 PM MSTSevere Thunderstorm WarningVEFMohave46 min
Aug 3, 6:34 PM MSTAreal Flood WarningVEFMohave12 hr
Aug 3, 7:24 PM MSTFlash Flood WarningVEFMohave3 hr
Aug 3, 9:19 PM MSTFlash Flood WarningVEFMohave3 hr
Aug 4, 4:58 PM MSTAreal Flood AdvisoryVEFMohave3 hr

Nearby

Severe Thunderstorm Warnings in Arizona, 2014Every severe thunderstorm warning in 2014

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.