Alert archive / Arizona / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 13, NWS Las Vegas, NV

July 27, 2014Mohave County, Arizona; Clark County, Nevada

NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 27, 2014, 2:12 PM MST for Mohave County, Arizona; Clark County, Nevada. It was in force for 48 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 27, 2014, 2:12 PM MST (21:12 UTC)
Expired
Jul 27, 2014, 3:00 PM MST
In force
48 min
Issued by
NWS Las Vegas, NV
Area
Storm-based polygon

Counties Mohave County, AZ, Clark County, NV

The radar

The Las Vegas radar (KESX), 83 km from the middle of the area, began a volume at 21:11 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, 9.2 hours before the alert went out and 136 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 12:00Z on 2014-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 401 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Las Vegas, NV at 12:00Z on 2014-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 square meters per square second.193958Sfc1 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
401 J/kg
Mixed-layer CIN
-258 J/kg
Mixed-layer LCL
2861 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-10 m²/s²
0-3 km storm-relative helicity
-4 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.

914 
WUUS55 KVEF 272112
SVRVEF
AZC015-NVC003-272200-
/O.NEW.KVEF.SV.W.0013.140727T2112Z-140727T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
212 PM MST SUN JUL 27 2014

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL MOHAVE COUNTY IN NORTHWEST ARIZONA...
  EAST CENTRAL CLARK COUNTY IN SOUTHERN NEVADA...

* UNTIL 300 PM MST/300 PM PDT/.

* AT 211 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 6 MILES
  EAST OF MEADVIEW...OR 44 MILES SOUTHEAST OF OVERTON...AND WAS
  MOVING NORTHWEST AT 15 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MEADVIEW AND SOUTH COVE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM WILL AFFECT LAKE MEAD. IF OUT IN OPEN WATERS...HEAD TO
SHORE IF THERE IS TIME...OTHERWISE DROP ANCHOR AND TAKE COVER IN THE
BOAT CABIN. STAY AWAY FROM METAL AND ALL ELECTRICAL COMPONENTS.
LIGHTNING KILLS!

&&

LAT...LON 3611 11427 3627 11400 3598 11379 3582 11407
TIME...MOT...LOC 2113Z 150DEG 11KT 3603 11398

$$

DSB
2 follow-up statements
086 
WWUS55 KVEF 272130
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
230 PM MST SUN JUL 27 2014

AZC015-NVC003-272200-
/O.CON.KVEF.SV.W.0013.000000T0000Z-140727T2200Z/
MOHAVE AZ-CLARK NV-
230 PM MST SUN JUL 27 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM
MST/300 PM PDT/ FOR EAST CENTRAL CLARK AND CENTRAL MOHAVE COUNTIES...

AT 227 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 6 MILES SOUTHEAST OF SOUTH COVE...OR 41 MILES SOUTHEAST OF
OVERTON...MOVING NORTHWEST AT 15 MPH.

LOCATIONS IMPACTED INCLUDE...
SOUTH COVE
MEADVIEW

LAT...LON 3611 11427 3627 11400 3598 11379 3582 11407
TIME...MOT...LOC 2130Z 150DEG 11KT 3608 11401

$$

DSB
113 
WWUS55 KVEF 272158
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
258 PM MST SUN JUL 27 2014

AZC015-NVC003-272207-
/O.EXP.KVEF.SV.W.0013.000000T0000Z-140727T2200Z/
MOHAVE AZ-CLARK NV-
258 PM MST SUN JUL 27 2014

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CLARK AND CENTRAL
MOHAVE COUNTIES WILL EXPIRE AT 300 PM MST/300 PM PDT/...

THE STORM THAT PROMPTED THE WARNING HAS WEAKENED.  GUSTY WINDS AND 
SMALL HAIL ARE STILL POSSIBLE WITH THIS STORM.

LAT...LON 3611 11427 3627 11400 3598 11379 3582 11407
TIME...MOT...LOC 2157Z 150DEG 11KT 3615 11406

$$

DSB

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 27, 11:41 AM MSTFlash Flood WarningVEFMohave3 hr
Jul 26, 5:27 PM MSTAreal Flood AdvisoryVEFLincoln2 hr
Jul 26, 7:20 PM MSTAreal Flood AdvisoryVEFClark3 hr
Jul 27, 2:28 PM MSTFlash Flood WarningVEFClark3 hr
Jul 27, 2:34 PM MSTFlash Flood WarningVEFClark5 hr
Jul 27, 2:48 PM MSTFlash Flood WarningVEFClark3 hr
Jul 27, 3:36 PM MSTAreal Flood AdvisoryVEFClark3 hr
Jul 27, 4:30 PM MSTFlash Flood WarningVEFClark2 hr

Nearby

Severe Thunderstorm Warnings in Arizona, 2014Severe Thunderstorm Warnings in Nevada, 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.