Alert archive / Nevada / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 71, NWS Las Vegas, NV

August 22, 2016Clark County, Nevada

NWS Las Vegas, NV issued this severe thunderstorm warning at Aug 22, 2016, 7:45 PM PDT for Clark County, Nevada. It was in force for 45 min. 3 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: Aug 22, 2016, 7:45 PM PDT (02:45 UTC)
Expired: Aug 22, 2016, 8:30 PM PDT
In force: 45 min
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon

County Clark County, NV

The radar

The Las Vegas radar (KESX), 68 km from the middle of the area, began a volume at 02:46 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
Aug 22, 7:54 PM PDT	TSTM WND GST 67	Nellis Afb, NV	NELLIS AFB MEASURED A PEAK WIND GUST OF 67 MPH. .
Aug 22, 8:00 PM PDT	TSTM WND DMG	2 W Nellis Afb, NV	NV ENERGY REPORTED AS MANY AS 6900 CUSTOMERS WITHOUT POWER IN NORTHEAST LAS VEGAS VALLEY. TIME ESTIMATED FROM NELLIS AFB WIND REPORT.
Aug 22, 8:10 PM PDT	TSTM WND DMG	5 Wnw Sam Boyd Stadium, NV	TREE ONE TO TWO FEET IN DIAMETER SNAPPED FROM HIGH WINDS AT CHAPARRAL HIGH SCHOOL. REPORT RELAYED VIA SOCIAL MEDIA. TIME ESTIMATED FROM RADAR.

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, 2.8 hours before the alert went out and 37 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: 472 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 3384 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

823 
WUUS55 KVEF 230245
SVRVEF
NVC003-230330-
/O.NEW.KVEF.SV.W.0071.160823T0245Z-160823T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
745 PM PDT MON AUG 22 2016

THE NATIONAL WEATHER SERVICE IN LAS VEGAS  HAS ISSUED A

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

* UNTIL 830 PM PDT

* AT 744 PM PDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS
  OF 60 MPH. THIS STORM WAS LOCATED NEAR NELLIS AFB...OR NEAR THE
  MOTOR SPEEDWAY...AND MOVING SOUTHEAST AT 50 MPH. THIS REPLACES THE
  PREVIOUS SEVERE THUNDERSTORM WARNING.

* LOCATIONS IMPACTED INCLUDE...
  LAS VEGAS...NORTH LAS VEGAS...THE STRIP...NELLIS AFB...
  THE MOTOR SPEEDWAY...ALIANTE...EAST LAS VEGAS...
  DOWNTOWN LAS VEGAS...CENTENNIAL HILLS...SPRING VALLEY...
  LONE MOUNTAIN...SUMMERLIN...PARADISE...ENTERPRISE...
  NORTH LAS VEGAS AIRPORT...FLOYD LAMB STATE PARK...
  MCCARRAN INTERNATIONAL AIRPORT...GASS PK...
  STRATOSPHERE TOWER AND UNLV.

THIS INCLUDES INTERSTATE 15 IN NEVADA BETWEEN MILE MARKERS 60 AND 63.
 
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 3628 11533 3652 11505 3626 11480 3605 11521
TIME...MOT...LOC 0244Z 303DEG 45KT 3633 11505 

$$

JS

2 follow-up statements

681 
WWUS55 KVEF 230306
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
806 PM PDT MON AUG 22 2016

NVC003-230330-
/O.CON.KVEF.SV.W.0071.000000T0000Z-160823T0330Z/
CLARK NV-
806 PM PDT MON AUG 22 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM PDT
FOR NORTH CENTRAL CLARK COUNTY...

AT 805 PM PDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING
WINDS IN EXCESS OF 60 MPH. THIS STORM HAS A HISTORY OF PRODUCING
DIME TO QUARTER SIZED HAIL AND WINDS IN EXCESS OF 60 MPH.

LOCATIONS IMPACTED INCLUDE...
LAS VEGAS...NORTH LAS VEGAS...THE STRIP...NELLIS AFB...
THE MOTOR SPEEDWAY...ALIANTE...EAST LAS VEGAS...DOWNTOWN LAS VEGAS...
CENTENNIAL HILLS...SPRING VALLEY...LONE MOUNTAIN...SUMMERLIN...
PARADISE...ENTERPRISE...NORTH LAS VEGAS AIRPORT...
FLOYD LAMB STATE PARK...MCCARRAN INTERNATIONAL AIRPORT...GASS PK...
STRATOSPHERE TOWER AND UNLV.

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 3628 11533 3652 11505 3626 11480 3605 11521
TIME...MOT...LOC 0305Z 303DEG 45KT 3619 11478 

$$

JS

816 
WWUS55 KVEF 230335
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
835 PM PDT MON AUG 22 2016

NVC003-230343-
/O.EXP.KVEF.SV.W.0071.000000T0000Z-160823T0330Z/
CLARK NV-
835 PM PDT MON AUG 22 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL CLARK COUNTY HAS
EXPIRED...
        
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IS IN EFFECT
FOR PORTIONS OF THE VALLEY AND LAKE MEAD RECREATION AREA. 

LAT...LON 3628 11533 3652 11505 3626 11480 3605 11521
TIME...MOT...LOC 0330Z 303DEG 45KT 3619 11478 

$$

JS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 22, 6:03 PM PDT	Areal Flood Advisory	VEF	Lincoln	3 hr
Aug 22, 6:20 PM PDT	Flash Flood Warning	VEF	Clark	3 hr
Aug 22, 6:45 PM PDT	Flash Flood Warning	VEF	Lincoln	3 hr
Aug 22, 6:57 PM PDT	Flash Flood Warning	VEF	Clark	4 hr
Aug 22, 7:09 PM PDT	Severe Thunderstorm Warning	VEF	Clark	36 min
Aug 22, 7:20 PM PDT	Flash Flood Warning	VEF	Clark	3 hr
Aug 22, 7:37 PM PDT	Severe Thunderstorm Warning	VEF	Clark	19 min
Aug 22, 8:19 PM PDT	Severe Thunderstorm Warning	VEF	Clark	41 min
Aug 22, 8:22 PM PDT	Flash Flood Warning	VEF	Clark, Lincoln	3 hr
Aug 22, 8:31 PM PDT	Flash Flood Warning	VEF	Clark	3 hr
Aug 22, 8:54 PM PDT	Severe Thunderstorm Warning	VEF	Clark	51 min
Aug 22, 9:42 PM PDT	Severe Thunderstorm Warning	VEF	Clark	33 min
Aug 22, 10:13 PM PDT	Areal Flood Advisory	VEF	Clark	3 hr
Aug 22, 11:16 PM PDT	Areal Flood Advisory	VEF	Clark	119 min
Aug 23, 2:24 AM PDT	Areal Flood Warning	VEF	Clark	24 hr
Aug 23, 3:07 PM PDT	Severe Thunderstorm Warning	VEF	Lincoln	38 min
Aug 23, 4:40 PM PDT	Severe Thunderstorm Warning	VEF	Lincoln	35 min
Aug 23, 4:56 PM PDT	Severe Thunderstorm Warning	VEF	Lincoln	34 min

Nearby

Severe Thunderstorm Warnings in Nevada, 2016 Every severe thunderstorm warning in 2016

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.