Alert archive / Nevada / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 73, NWS Las Vegas, NV

September 10, 2021Clark County, Nevada

NWS Las Vegas, NV issued this severe thunderstorm warning at Sep 10, 2021, 2:46 PM PDT for Clark County, Nevada. It was in force for 44 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
Sep 10, 2021, 2:46 PM PDT (21:46 UTC)
Expired
Sep 10, 2021, 3:30 PM PDT
In force
44 min
Issued by
NWS Las Vegas, NV
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Clark County, NV

The radar

The Las Vegas radar (KESX), 58 km from the middle of the area, began a volume at 21:49 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, 9.8 hours before the alert went out and 58 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 2021-09-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 612 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 2021-09-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -19 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
612 J/kg
Mixed-layer CIN
-111 J/kg
Mixed-layer LCL
2841 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
-19 m²/s²
0-3 km storm-relative helicity
27 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

252 
WUUS55 KVEF 102146
SVRVEF
NVC003-102230-
/O.NEW.KVEF.SV.W.0073.210910T2146Z-210910T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Las Vegas NV
246 PM PDT Fri Sep 10 2021

The National Weather Service in Las Vegas has issued a

* Severe Thunderstorm Warning for...
  Central Clark County in southern Nevada...

* Until 330 PM PDT.

* At 245 PM PDT, a severe thunderstorm was located near Lake Las
  Vegas, moving north at 20 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs and trees.

* Locations impacted include...
  Las Vegas, North Las Vegas, Las Vegas Bay, East Las Vegas, Lake Las
  Vegas, Nellis AFB, The Motor Speedway, Paradise, Las Vegas Bay
  Campground, Sunrise Mtn and Frenchman Mtn.

This includes Interstate 15 in Nevada between mile markers 60 and 65.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3611 11480 3609 11508 3639 11518 3640 11475
TIME...MOT...LOC 2145Z 171DEG 18KT 3617 11495 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

BKP
2 follow-up statements
886 
WWUS55 KVEF 102200
SVSVEF

Severe Weather Statement
National Weather Service Las Vegas NV
300 PM PDT Fri Sep 10 2021

NVC003-102230-
/O.CON.KVEF.SV.W.0073.000000T0000Z-210910T2230Z/
Clark NV-
300 PM PDT Fri Sep 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM PDT
FOR CENTRAL CLARK COUNTY...

At 259 PM PDT, a severe thunderstorm was located near The Motor
Speedway, moving north at 20 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs and trees.

Locations impacted include...
Las Vegas, North Las Vegas, Las Vegas Bay, East Las Vegas, Lake Las
Vegas, Nellis AFB, The Motor Speedway, Paradise, Las Vegas Bay
Campground, Sunrise Mtn and Frenchman Mtn.

This includes Interstate 15 in Nevada between mile markers 60 and 65.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3611 11480 3609 11508 3639 11518 3640 11475
TIME...MOT...LOC 2159Z 174DEG 18KT 3624 11495 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

BKP
165 
WWUS55 KVEF 102221
SVSVEF

Severe Weather Statement
National Weather Service Las Vegas NV
321 PM PDT Fri Sep 10 2021

NVC003-102231-
/O.EXP.KVEF.SV.W.0073.000000T0000Z-210910T2230Z/
Clark NV-
321 PM PDT Fri Sep 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CLARK COUNTY WILL
EXPIRE AT 330 PM PDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

LAT...LON 3611 11480 3609 11508 3639 11518 3640 11475
TIME...MOT...LOC 2221Z 171DEG 18KT 3634 11497 

$$

BKP

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 9, 5:11 PM PDTSevere Thunderstorm WarningVEFClark34 min
Sep 10, 1:48 AM PDTExcessive Heat WarningVEF4 days
Sep 10, 1:44 PM PDTSevere Thunderstorm WarningVEFClark46 min

Nearby

Severe Thunderstorm Warnings in Nevada, 2021Every severe thunderstorm warning in 2021

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.