Alert archive / Nevada / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 25, NWS Las Vegas, NV

July 22, 2021Clark County, Nevada

NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 22, 2021, 12:53 PM PDT for Clark County, Nevada. It was in force for 26 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, 12:53 PM PDT (19:53 UTC)
Expired: Jul 22, 2021, 1:19 PM PDT
In force: 26 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), 50 km from the middle of the area, began a volume at 19:58 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, 7.9 hours before the alert went out and 45 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.

811 
WUUS55 KVEF 221953
SVRVEF
NVC003-222030-
/O.NEW.KVEF.SV.W.0025.210722T1953Z-210722T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Las Vegas NV
1253 PM PDT Thu Jul 22 2021

The National Weather Service in Las Vegas has issued a

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

* Until 130 PM PDT.

* At 1251 PM PDT, a severe thunderstorm was located over Mountains
  Edge, outflow winds are moving northeast at 35 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs and trees.

* Locations impacted include...
  Las Vegas, Henderson, North Las Vegas, Southern Highlands,
  Mountains Edge, The Strip, Spring Valley, Green Valley, Downtown
  Las Vegas, Enterprise, East Las Vegas, Sam Boyd Stadium, Paradise,
  Aliante, Blue Diamond, Summerlin, Silverado Ranch, North Las Vegas
  Airport, Mccarran International Airport and Stratosphere Tower.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3594 11539 3600 11541 3630 11519 3610 11496
      3594 11526
TIME...MOT...LOC 1951Z 233DEG 29KT 3602 11530 

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

SC

2 follow-up statements

761 
WWUS55 KVEF 222013
SVSVEF

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

NVC003-222030-
/O.CON.KVEF.SV.W.0025.000000T0000Z-210722T2030Z/
Clark NV-
113 PM PDT Thu Jul 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 PM PDT
FOR SOUTHWESTERN CLARK COUNTY...

At 108 PM PDT, a severe thunderstorm was located near Mountains Edge 
with severe winds extending far away from the thunderstorm. Severe 
winds are moving quickly to the northeast and will impact locations 
that are from this storm.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs and trees.

Locations impacted include...
Las Vegas, Henderson, North Las Vegas, Southern Highlands, Mountains
Edge, The Strip, Spring Valley, Green Valley, Downtown Las Vegas,
Enterprise, East Las Vegas, Sam Boyd Stadium, Paradise, Aliante, Blue
Diamond, Summerlin, Silverado Ranch, North Las Vegas Airport,
Mccarran International Airport and Stratosphere Tower.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Wind damage with this storm will occur before any rain or lightning.
Do not wait for the sound of thunder before taking cover. SEEK
SHELTER IMMEDIATELY inside a sturdy structure and stay away from
windows.

&&

LAT...LON 3594 11539 3600 11541 3630 11519 3610 11496
      3594 11526
TIME...MOT...LOC 2008Z 215DEG 24KT 3612 11521 

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

SC

124 
WWUS55 KVEF 222019
SVSVEF

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

NVC003-222026-
/O.CAN.KVEF.SV.W.0025.000000T0000Z-210722T2030Z/
Clark NV-
119 PM PDT Thu Jul 22 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CLARK COUNTY IS
CANCELLED...
                
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 has been cancelled.  However gusty winds of 
35 to 45 mph are still possible with this thunderstorm. Brief heavy 
downpours are likely across the western portions of the Las Vegas 
Valley including Summerlin through 200 pm.

LAT...LON 3594 11539 3600 11541 3630 11519 3610 11496
      3594 11526
TIME...MOT...LOC 2016Z 233DEG 29KT 3616 11514 

$$

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, 1:31 PM PDT	Severe Thunderstorm Warning	VEF	Clark	44 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.