Alert archive / Nevada / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 21, NWS Las Vegas, NV

July 18, 2015Clark County, Nevada

NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 18, 2015, 12:28 PM PDT for Clark County, Nevada. It was in force for 32 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 18, 2015, 12:28 PM PDT (19:28 UTC)
Expired
Jul 18, 2015, 1:00 PM PDT
In force
32 min
Issued by
NWS Las Vegas, NV
Area
Storm-based polygon

County Clark County, NV

The radar

The Las Vegas radar (KESX), 40 km from the middle of the area, began a volume at 19:31 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, 7.5 hours before the alert went out and 75 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 2015-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 512 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 2015-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 84 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
512 J/kg
Mixed-layer CIN
-180 J/kg
Mixed-layer LCL
2251 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
84 m²/s²
0-3 km storm-relative helicity
72 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.

192 
WUUS55 KVEF 181928
SVRVEF
NVC003-182000-
/O.NEW.KVEF.SV.W.0021.150718T1928Z-150718T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
1228 PM PDT SAT JUL 18 2015

THE NATIONAL WEATHER SERVICE IN LAS VEGAS  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL CLARK COUNTY IN SOUTHERN NEVADA...

* UNTIL 100 PM PDT

* AT 1227 PM PDT...DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS 
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE 
  STORMS WERE LOCATED NEAR JEAN AND PRIMM...AND MOVING NORTHEAST AT 
  55 MPH.

* LOCATIONS IMPACTED INCLUDE...
  JEAN...PRIMM AND GOODSPRINGS. 

THIS INCLUDES INTERSTATE 15 IN NEVADA BETWEEN MILE MARKERS 1 AND 22.
 
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 3561 11539 3562 11540 3578 11546 3594 11527
      3576 11506
TIME...MOT...LOC 1927Z 240DEG 49KT 3580 11525 

$$

STACHELSKI
2 follow-up statements
889 
WWUS55 KVEF 181943
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1243 PM PDT SAT JUL 18 2015

NVC003-182000-
/O.CON.KVEF.SV.W.0021.000000T0000Z-150718T2000Z/
CLARK NV-
1243 PM PDT SAT JUL 18 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 PM PDT
FOR CENTRAL CLARK COUNTY...

AT 1241 PM PDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM
WAS LOCATED NORTHEAST OF JEAN AND WAS MOVING NORTHEAST AT 55 MPH.

LOCATIONS IMPACTED INCLUDE...
JEAN
GOODSPRINGS
INTERSTATE 15 BETWEEN MILE MARKERS 11 AND 22. 

THIS INCLUDES INTERSTATE 15 IN NEVADA BETWEEN MILE MARKERS 4 AND 22.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

&&

LAT...LON 3566 11539 3568 11542 3578 11546 3594 11527
      3576 11506
TIME...MOT...LOC 1941Z 240DEG 49KT 3590 11503 

$$

STACHELSKI
441 
WWUS55 KVEF 182002
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
102 PM PDT SAT JUL 18 2015

NVC003-182012-
/O.EXP.KVEF.SV.W.0021.000000T0000Z-150718T2000Z/
CLARK NV-
102 PM PDT SAT JUL 18 2015

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CLARK COUNTY HAS
EXPIRED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF 
THE WARNED AREA NEAR JEAN. THEREFORE THIS WARNING HAS BEEN ALLOWED 
TO EXPIRE.

LAT...LON 3566 11539 3568 11542 3578 11546 3594 11527
      3576 11506
TIME...MOT...LOC 1959Z 240DEG 49KT 3590 11503 

$$

STACHELSKI

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 17, 10:27 PM PDTSevere Thunderstorm WarningVEFClark48 min
Jul 17, 10:35 PM PDTFlash Flood WarningVEFClark115 min
Jul 18, 12:27 AM PDTFlash Flood WarningVEFClark3 hr
Jul 18, 11:27 AM PDTSevere Thunderstorm WarningVEFClark, Lincoln33 min
Jul 18, 12:10 PM PDTFlash Flood WarningVEFClark, Lincoln3 hr
Jul 18, 12:45 PM PDTSevere Thunderstorm WarningVEFClark44 min
Jul 18, 12:57 PM PDTSevere Thunderstorm WarningVEFClark33 min
Jul 18, 1:23 PM PDTFlash Flood WarningVEFClark6 hr
Jul 18, 1:26 PM PDTFlash Flood WarningVEFLincoln5 hr
Jul 18, 1:27 PM PDTSevere Thunderstorm WarningVEFClark58 min

Nearby

Severe Thunderstorm Warnings in Nevada, 2015Every severe thunderstorm warning in 2015

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.