Alert archive / Nevada / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 101, NWS Las Vegas, NV

July 10, 2011Clark County, Nevada

NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 10, 2011, 1:57 PM PDT for Clark County, Nevada. It was in force for 34 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 10, 2011, 1:57 PM PDT (20:57 UTC)
Expired: Jul 10, 2011, 2:31 PM PDT
In force: 34 min
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon

County Clark County, NV

The radar

The Las Vegas radar (KESX), 81 km from the middle of the area, began a volume at 20:58 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, 9.0 hours before the alert went out and 52 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3297 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 34 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.

233 
WUUS55 KVEF 102057
SVRVEF
NVC003-102200-
/O.NEW.KVEF.SV.W.0101.110710T2057Z-110710T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
157 PM PDT SUN JUL 10 2011

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

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

* UNTIL 300 PM PDT.

* AT 150 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR NELLIS AIR FORCE BASE...OR
  11 MILES NORTHEAST OF DOWNTOWN LAS VEGAS...AND MOVING NORTHEAST AT
  25 MPH.

* LOCATIONS IMPACTED INCLUDE...NELLIS AIR FORCE BASE AND SUNRISE MTN.

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 3666 11494 3647 11459 3620 11500 3621 11508
      3636 11519
TIME...MOT...LOC 2057Z 219DEG 22KT 3635 11502

$$

STACHELSKI

2 follow-up statements

570 
WWUS55 KVEF 102112
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
212 PM PDT SUN JUL 10 2011

NVC003-102200-
/O.CON.KVEF.SV.W.0101.000000T0000Z-110710T2200Z/
CLARK NV-
212 PM PDT SUN JUL 10 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM PDT
FOR CENTRAL CLARK COUNTY...

AT 205 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED OVER CENTRAL CLARK
COUNTY...OR 17 MILES NORTHEAST OF LAS VEGAS...MOVING NORTHEAST AT 25 
MPH. 

THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF THE INDICATED COUNTY. AREAS ALONG INTERSTATE 15 BETWEEN MILE 
MARKERS 56 AND 78 AND ALONG HIGHWAY 93 BETWEEN MILE MARKER 73 AND 
THE INTERCHANGE WITH INTERSTATE 15 WILL BE AFFECTED BY THIS STORM.

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 3625 11493 3626 11504 3637 11515 3666 11494
      3647 11459
TIME...MOT...LOC 2111Z 219DEG 22KT 3642 11495

$$

STACHELSKI

201 
WWUS55 KVEF 102131
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
231 PM PDT SUN JUL 10 2011

NVC003-102140-
/O.CAN.KVEF.SV.W.0101.000000T0000Z-110710T2200Z/
CLARK NV-
231 PM PDT SUN JUL 10 2011

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

THE THUNDERSTORM WHICH PROMPTED THE SEVERE THUNDERSTORM WARNING 
NORTHEAST OF LAS VEGAS HAS SPLIT AND WEAKENED TO BELOW SEVERE 
LIMITS. THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED 
TO EXPIRE. THUNDERSTORMS CONTINUE TO AFFECT AREAS NORTHEAST OF LAS 
VEGAS...SO BE ALERT IF YOU ARE IN THE AREA OR PLAN TO TRAVEL THROUGH 
IT. 

LAT...LON 3625 11493 3626 11504 3637 11515 3666 11494
      3647 11459
TIME...MOT...LOC 2130Z 219DEG 22KT 3651 11486

$$

STACHELSKI

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 5:41 PM PDT	Severe Thunderstorm Warning	VEF	Clark	49 min
Jul 9, 5:45 PM PDT	Areal Flood Advisory	VEF	Clark	59 min
Jul 10, 12:23 PM PDT	Severe Thunderstorm Warning	VEF	Clark	52 min
Jul 10, 1:02 PM PDT	Severe Thunderstorm Warning	VEF	Clark	43 min
Jul 10, 1:18 PM PDT	Areal Flood Advisory	VEF	Clark	3 hr
Jul 10, 1:26 PM PDT	Areal Flood Advisory	VEF	Clark	3 hr
Jul 10, 1:27 PM PDT	Severe Thunderstorm Warning	VEF	Clark	48 min
Jul 10, 2:43 PM PDT	Severe Thunderstorm Warning	VEF	Clark	47 min
Jul 10, 3:09 PM PDT	Severe Thunderstorm Warning	VEF	Clark	20 min
Jul 10, 3:46 PM PDT	Severe Thunderstorm Warning	VEF	Clark, Lincoln	44 min

Nearby

Severe Thunderstorm Warnings in Nevada, 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.