Alert archive / Nevada / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 26, NWS Las Vegas, NV

July 22, 2021Clark County, Nevada

NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 22, 2021, 1:31 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: Jul 22, 2021, 1:31 PM PDT (20:31 UTC)
Expired: Jul 22, 2021, 2:15 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), 62 km from the middle of the area, began a volume at 20:29 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, 8.5 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: 112 J/kg
Mixed-layer CIN: -243 J/kg
Mixed-layer LCL: 2637 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: -4 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

011 
WUUS55 KVEF 222031
SVRVEF
NVC003-222115-
/O.NEW.KVEF.SV.W.0026.210722T2031Z-210722T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Las Vegas NV
131 PM PDT Thu Jul 22 2021

The National Weather Service in Las Vegas has issued a

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

* Until 215 PM PDT.

* At 131 PM PDT, a severe thunderstorm was located over North Las
  Vegas Airport, or over Las Vegas, moving northeast 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, Aliante, Nellis AFB, Downtown Las
  Vegas, Lone Mountain, The Strip, East Las Vegas, Summerlin, Spring
  Valley, Paradise, North Las Vegas Airport and Stratosphere Tower.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3611 11522 3621 11532 3636 11518 3621 11500
TIME...MOT...LOC 2031Z 238DEG 18KT 3619 11521 

HAIL...<.75IN
WIND...60MPH
 
$$

SC

2 follow-up statements

997 
WWUS55 KVEF 222058
SVSVEF

Severe Weather Statement
National Weather Service Las Vegas NV
158 PM PDT Thu Jul 22 2021

NVC003-222115-
/O.CON.KVEF.SV.W.0026.000000T0000Z-210722T2115Z/
Clark NV-
158 PM PDT Thu Jul 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM PDT
FOR CENTRAL CLARK COUNTY...

At 156 PM PDT, a severe thunderstorm was located over Aliante, moving
northeast at 20 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs and trees.

Locations impacted include...
North Las Vegas, Aliante and Nellis AFB.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3611 11522 3621 11532 3636 11518 3621 11500
TIME...MOT...LOC 2056Z 197DEG 18KT 3632 11517 

HAIL...<.75IN
WIND...60MPH
 
$$

SC

876 
WWUS55 KVEF 222111
SVSVEF

Severe Weather Statement
National Weather Service Las Vegas NV
211 PM PDT Thu Jul 22 2021

NVC003-222120-
/O.EXP.KVEF.SV.W.0026.000000T0000Z-210722T2115Z/
Clark NV-
211 PM PDT Thu Jul 22 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CLARK COUNTY WILL
EXPIRE AT 215 PM PDT...
        
The storm which prompted the warning in the Northern portion of the 
Las Vegas Valley has weakened below severe limits, and has exited 
the warned area. Therefore, the warning will be allowed to expire.

Remember, a Severe Thunderstorm Warning still remains in effect for 
the south and eastern portions of the Las Vegas Valley including 
Anthem, Green Valley and Henderson.

LAT...LON 3611 11522 3621 11532 3636 11518 3621 11500
TIME...MOT...LOC 2110Z 238DEG 18KT 3636 11510 

$$

SC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 10:18 AM PDT	Flash Flood Watch	VEF	Clark, Lincoln, Nye	11 hr
Jul 22, 12:53 PM PDT	Severe Thunderstorm Warning	VEF	Clark	26 min
Jul 22, 1:35 PM PDT	Flash Flood Warning Considerable damage threat	VEF	Lincoln	3 hr
Jul 22, 1:36 PM PDT	Flash Flood Warning Considerable damage threat	VEF	Clark	3 hr
Jul 22, 1:49 PM PDT	Severe Thunderstorm Warning	VEF	Clark	41 min
Jul 22, 2:20 PM PDT	Flash Flood Warning Considerable damage threat	VEF	Clark	3 hr
Jul 22, 2:32 PM PDT	Flash Flood Warning Considerable damage threat	VEF	Clark	3 hr
Jul 22, 3:03 PM PDT	Severe Thunderstorm Warning	VEF	Clark, Lincoln	42 min
Jul 22, 3:21 PM PDT	Flash Flood Warning Considerable damage threat	VEF	Clark, Lincoln	3 hr
Jul 22, 4:09 PM PDT	Severe Thunderstorm Warning	VEF	Clark	51 min

Nearby

Severe Thunderstorm Warnings in Nevada, 2021 Every 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.