Alert archive / Nevada / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 28, NWS Las Vegas, NV

July 22, 2021Clark County, Lincoln County, Nevada

NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 22, 2021, 3:03 PM PDT for Clark County, Lincoln County, Nevada. It was in force for 42 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, 3:03 PM PDT (22:03 UTC)
Expired: Jul 22, 2021, 3:45 PM PDT
In force: 42 min
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Clark County, NV, Lincoln County, NV

The radar

The Las Vegas radar (KESX), 141 km from the middle of the area, began a volume at 22:03 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, 10.1 hours before the alert went out and 81 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.

223 
WUUS55 KVEF 222203
SVRVEF
NVC003-017-222245-
/O.NEW.KVEF.SV.W.0028.210722T2203Z-210722T2245Z/

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

The National Weather Service in Las Vegas has issued a

* Severe Thunderstorm Warning for...
  Southwestern Lincoln County in south central Nevada...
  North central Clark County in southern Nevada...

* Until 345 PM PDT.

* At 302 PM PDT, a cluster of severe thunderstorms located 16 miles 
  northwest of Coyote Springs, or 23 miles south of Alamo, are 
  moving northeast at 10 mph.

  HAZARD...70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Alamo and Coyote Springs. 

This includes Highway 93 south of and including Alamo.
 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3674 11491 3673 11556 3727 11574 3741 11499
      3715 11456 3685 11454 3686 11491
TIME...MOT...LOC 2202Z 240DEG 9KT 3701 11508 

HAIL...<.75IN
WIND...70MPH
 
$$

VARIAN

1 follow-up statement

965 
WWUS55 KVEF 222243
SVSVEF

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

NVC003-017-222251-
/O.EXP.KVEF.SV.W.0028.000000T0000Z-210722T2245Z/
Lincoln NV-Clark NV-
343 PM PDT Thu Jul 22 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN LINCOLN AND NORTH
CENTRAL CLARK COUNTIES WILL EXPIRE AT 345 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 3674 11491 3673 11556 3727 11574 3741 11499
      3715 11456 3685 11454 3686 11491
TIME...MOT...LOC 2241Z 240DEG 9KT 3705 11500 

$$

VARIAN

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, 1:31 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, 3:21 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.