Alert archive / Nevada / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 17, NWS Las Vegas, NV

July 13, 2021Clark County, Nevada; Mohave County, Arizona

NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 13, 2021, 7:24 PM PDT for Clark County, Nevada; Mohave County, Arizona. It was in force for 96 min. 1 report 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: Jul 13, 2021, 7:24 PM PDT (02:24 UTC)
Expired: Jul 13, 2021, 9:00 PM PDT
In force: 96 min
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Mohave County, AZ, Clark County, NV

The radar

The Las Vegas radar (KESX), 93 km from the middle of the area, began a volume at 02:27 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
Jul 13, 8:41 PM PDT	TSTM WND DMG	2 Ne Bunkerville, NV	TREE BLOWN OVER INTO ROADWAY BY WINDS ASSOCIATED WITH A THUNDERSTORM. GENERAL LOCATION ESTIMATED.

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, 2.4 hours before the alert went out and 116 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: 829 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 3527 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

066 
WUUS55 KVEF 140224
SVRVEF
AZC015-NVC003-140400-
/O.NEW.KVEF.SV.W.0017.210714T0224Z-210714T0400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Las Vegas NV
724 PM PDT Tue Jul 13 2021

The National Weather Service in Las Vegas has issued a

* Severe Thunderstorm Warning for...
  Northwestern Mohave County in northwestern Arizona...
  Northeastern Clark County in southern Nevada...

* Until 900 PM PDT/900 PM MST/.

* At 723 PM PDT/723 PM MST/, severe thunderstorms were located along
  a line extending from near Bunkerville to near Overton to 11 miles
  west of Valley Of Fire, moving southeast at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs and trees.

* Locations impacted include...
  Mesquite, Boulder City, Las Vegas Bay, Overton, Moapa Valley, Echo
  Bay, Boulder Beach, Boulder Beach Campground, Echo Bay Campground,
  Callville Bay, Meadview, Hoover Dam, Bunkerville, Valley Of Fire,
  Callville Bay Campground, Lake Mead National Recreation Area,
  Temple Bar Campground, Overton Beach, South Cove and Temple Bar.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Wind damage with these storms 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.

If on or near Lake Mead, get away from the water and move indoors or 
inside a vehicle. Remember, lightning can strike out to 15 miles 
from the parent thunderstorm. If you can hear thunder, you are close 
enough to be struck by lightning. Move to safe shelter now!  Do not 
be caught on the water in a thunderstorm.

&&

LAT...LON 3639 11367 3594 11406 3594 11485 3637 11489
      3659 11446 3681 11409
TIME...MOT...LOC 0223Z 331DEG 20KT 3670 11412 3652 11442 3648 11471 

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

CP

1 follow-up statement

404 
WWUS55 KVEF 140355
SVSVEF

Severe Weather Statement
National Weather Service Las Vegas NV
855 PM PDT Tue Jul 13 2021

AZC015-NVC003-140403-
/O.EXP.KVEF.SV.W.0017.000000T0000Z-210714T0400Z/
Mohave AZ-Clark NV-
855 PM PDT Tue Jul 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MOHAVE AND
NORTHEASTERN CLARK COUNTIES WILL EXPIRE AT 900 PM PDT/900 PM MST/...

This thunderstorm warning has been replaced with another warning. 
Thunderstorms near Lake Mead are still capable of producing severe 
winds. 

LAT...LON 3639 11367 3594 11406 3594 11485 3637 11489
      3659 11446 3681 11409
TIME...MOT...LOC 0353Z 331DEG 20KT 3627 11383 3609 11413 3605 11442 

$$

CP

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 6:41 PM PDT	Severe Thunderstorm Warning	VEF	Lincoln	49 min
Jul 13, 7:36 PM PDT	Severe Thunderstorm Warning	VEF	Clark	69 min
Jul 13, 8:52 PM PDT	Severe Thunderstorm Warning	VEF	Clark	53 min
Jul 13, 8:29 PM PDT	Severe Thunderstorm Warning	VEF	Mohave	91 min
Jul 14, 10:59 AM PDT	Flash Flood Watch	VEF	Mohave	13 hr

Nearby

Severe Thunderstorm Warnings in Nevada, 2021 Severe Thunderstorm Warnings in Arizona, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.