Alert archive / Arizona / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 71, NWS Las Vegas, NV

July 3, 2011Mohave County, Arizona; Clark County, Nevada

NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 3, 2011, 7:06 PM MST for Mohave County, Arizona; Clark County, Nevada. It was in force for 54 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 3, 2011, 7:06 PM MST (02:06 UTC)
Expired: Jul 3, 2011, 8:00 PM MST
In force: 54 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), 28 km from the middle of the area, began a volume at 02:07 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.

What was reported inside it

Time	Report	Where	Remark
Jul 3, 7:12 PM MST	TSTM WND GST 51	1 Nnw East Las Vegas, NV	A SPOTTER MEASURED A 51 MPH THUNDERSTORM GUST IN EAST LAS VEGAS.
Jul 3, 7:15 PM MST	TSTM WND DMG	4 Wsw East Las Vegas, NV	LAS VEGAS AREA BROADCAST MEDIA REPORTD THAT A TREE FELL ON A CAR AND DAMAGED IT NEAR RUSSELL ROAD. THE TIME OF THIS EVENT IS ESTIMATED.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Las Vegas, NV (KVEF), launched 00:00Z, 2.1 hours before the alert went out and 72 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: 5387 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 43 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.

195 
WUUS55 KVEF 040206
SVRVEF
AZC015-NVC003-040300-
/O.NEW.KVEF.SV.W.0071.110704T0206Z-110704T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
706 PM PDT SUN JUL 3 2011

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

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

* UNTIL 800 PM PDT/800 PM MST/.

* AT 705 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN
  EXCESS OF 70 MPH.  THIS STORM WAS LOCATED 8 MILES SOUTHEAST OF
  ANTHEM...OR 11 MILES SOUTH OF HENDERSON...AND MOVING SOUTHEAST AT
  30 MPH.

* LOCATIONS IMPACTED INCLUDE...BOULDER CITY...GREEN VALLEY...
  HENDERSON...RAILROAD PASS...ANTHEM...BLACK MTN...EAST LAS VEGAS...
  FLAMINGO AND BOULDER HIGHWAY...HENDERSON EXECUTIVE AIRPORT...
  MCCARRAN INTERNATIONAL AIRPORT...SAM BOYD STADIUM...SAM'S TOWN...
  SEVEN HILLS...SILVERADO RANCH...UNLV AND WINDMILL AND GREEN VALLEY
  PARKWAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. NEARLY CONTINUOUS CLOUD TO GROUND
LIGHTNING IS OCCURRING WITH THIS STORM. IF CAUGHT OUTDOORS...SEEK
SHELTER IN A STURDY BUILDING UNTIL THE STORM PASSES.

IN ADDITION TO HEAVY RAINFALL AND LIGHTNING...THIS STORM HAS A
HISTORY OF PRODUCING DESTRUCTIVE WINDS OF NEARLY 60 MPH.

&&

LAT...LON 3613 11489 3585 11469 3564 11477 3582 11520
      3611 11517
TIME...MOT...LOC 0206Z 297DEG 26KT 3587 11501

$$

STACHELSKI

2 follow-up statements

291 
WWUS55 KVEF 040230
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
730 PM PDT SUN JUL 3 2011

AZC015-NVC003-040300-
/O.CON.KVEF.SV.W.0071.000000T0000Z-110704T0300Z/
MOHAVE AZ-CLARK NV-
730 PM PDT SUN JUL 3 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM
PDT/800 PM MST/ FOR CENTRAL CLARK AND EXTREME WEST CENTRAL MOHAVE
COUNTIES...

AT 725 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE WINDS
IN EXCESS OF 70 MPH.  THIS STORM WAS LOCATED 12 MILES SOUTH OF
BOULDER CITY...MOVING SOUTHEAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF THE INDICATED COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO HEAVY RAINFALL AND LIGHTNING...THIS STORM HAS A
HISTORY OF PRODUCING DESTRUCTIVE WINDS OF 70 MPH.

&&

LAT...LON 3613 11489 3585 11469 3564 11477 3582 11520
      3611 11517
TIME...MOT...LOC 0230Z 297DEG 26KT 3579 11482

$$

STACHELSKI

919 
WWUS55 KVEF 040251
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
751 PM PDT SUN JUL 3 2011

AZC015-NVC003-040301-
/O.EXP.KVEF.SV.W.0071.000000T0000Z-110704T0300Z/
MOHAVE AZ-CLARK NV-
751 PM PDT SUN JUL 3 2011

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CLARK AND EXTREME WEST
CENTRAL MOHAVE COUNTIES WILL EXPIRE AT 800 PM PDT/800 PM MST/...

THUNDERSTORMS HAVE WEAKENED OVER THE SOUTHEAST PORTION OF THE LAS 
VEGAS VALLEY. THEREFORE THE SEVERE THUNDERSTORM WARNING IN EFFECT 
FOR THIS AREA WILL BE ALLOWED TO EXPIRE.

LAT...LON 3613 11489 3585 11469 3564 11477 3582 11520
      3611 11517
TIME...MOT...LOC 0251Z 297DEG 26KT 3572 11465

$$

STACHELSKI

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 5:43 PM MST	Flash Flood Warning	VEF	Mohave	45 min
Jul 3, 9:40 PM MST	Flash Flood Warning	VEF	Mohave	80 min
Jul 3, 9:46 PM MST	Areal Flood Advisory	VEF		119 min
Jul 3, 9:59 PM MST	Severe Thunderstorm Warning	VEF	Mohave	46 min
Jul 3, 10:18 PM MST	Severe Thunderstorm Warning	VEF	Mohave	42 min
Jul 3, 6:41 PM MST	Flash Flood Warning	VEF	Clark	2 hr
Jul 3, 6:53 PM MST	Flash Flood Warning	VEF	Clark	64 min
Jul 3, 7:40 PM MST	Flash Flood Warning	VEF	Clark	95 min
Jul 4, 3:48 PM MST	Flash Flood Warning	VEF	Esmeralda, Lincoln, Nye	117 min
Jul 4, 4:35 PM MST	Flash Flood Warning	VEF	Esmeralda, Nye	115 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2011 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.