Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 76, NWS Las Vegas, NV

October 5, 2021Mohave County, Arizona; Clark County, Nevada

NWS Las Vegas, NV issued this severe thunderstorm warning at Oct 5, 2021, 11:42 AM MST for Mohave County, Arizona; Clark County, Nevada. It was in force for 63 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: Oct 5, 2021, 11:42 AM MST (18:42 UTC)
Expired: Oct 5, 2021, 12:45 PM MST
In force: 63 min
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon
Damage threat: Considerable
Hail: 0.75 in
Wind: 70.0 mph

Counties Mohave County, AZ, Clark County, NV

The radar

The Las Vegas radar (KESX), 78 km from the middle of the area, began a volume at 18:47 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, 6.7 hours before the alert went out and 129 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2875 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

143 
WUUS55 KVEF 051842
SVRVEF
AZC015-NVC003-051945-
/O.NEW.KVEF.SV.W.0076.211005T1842Z-211005T1945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Las Vegas NV
1142 AM PDT Tue Oct 5 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 1245 PM PDT/1245 PM MST/.

* At 1139 AM PDT/1139 AM MST/, a line of severe thunderstorms were 
  located 13 miles southwest of Lake Mead National Recreation Area, 
  or 25 miles east of Boulder City, moving north at 45 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...
  Boulder City, Las Vegas Bay, Overton, Moapa Valley, Echo Bay, Grand
  Canyon Skywalk, Boulder Beach Campground, Las Vegas Bay Campground,
  Pierce Ferry And Antares Roads, Meadview, Hoover Dam, Temple Bar
  Campground, South Cove, Logandale, Boulder Beach, Echo Bay
  Campground, Callville Bay, Grand Canyon Ranch, Valley Of Fire and
  Callville Bay Campground.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 3570 11358 3547 11468 3629 11493 3670 11438
      3653 11376
TIME...MOT...LOC 1839Z 169DEG 38KT 3584 11442 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

JS

2 follow-up statements

043 
WWUS55 KVEF 051922
SVSVEF

Severe Weather Statement
National Weather Service Las Vegas NV
1222 PM PDT Tue Oct 5 2021

AZC015-NVC003-051945-
/O.CON.KVEF.SV.W.0076.000000T0000Z-211005T1945Z/
Mohave AZ-Clark NV-
1222 PM PDT Tue Oct 5 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 PM
PDT/1245 PM MST/ FOR NORTHWESTERN MOHAVE AND NORTHEASTERN CLARK
COUNTIES...

At 1214 PM PDT/1214 PM MST/, doppler radar continued to indicate a 
line of thunderstorms with severe winds moving into the Lake Mead 
National Recreation Area. Anyone in the path of these storms should 
take cover and get off of the lake until the threat has ended.

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...
Boulder City, Las Vegas Bay, Overton, Moapa Valley, Echo Bay, Grand
Canyon Skywalk, Boulder Beach Campground, Las Vegas Bay Campground,
Pierce Ferry And Antares Roads, Meadview, Hoover Dam, Temple Bar
Campground, South Cove, Logandale, Boulder Beach, Echo Bay
Campground, Callville Bay, Grand Canyon Ranch, Valley Of Fire and
Callville Bay Campground.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 3570 11358 3547 11468 3629 11493 3670 11438
      3653 11376
TIME...MOT...LOC 1914Z 169DEG 38KT 3621 11451 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

JS

714 
WWUS55 KVEF 051948
SVSVEF

Severe Weather Statement
National Weather Service Las Vegas NV
1248 PM PDT Tue Oct 5 2021

AZC015-NVC003-051953-
/O.EXP.KVEF.SV.W.0076.000000T0000Z-211005T1945Z/
Mohave AZ-Clark NV-
1248 PM PDT Tue Oct 5 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MOHAVE AND
NORTHEASTERN CLARK COUNTIES WILL EXPIRE AT 1245 PM PDT/1245 PM
MST/...
        
A new warning has been issued that replaces this warning. Areas 
south of the Lake Mead National Recreation Area are no longer in the 
warned area however, strong gusty winds may continue.

A Severe Thunderstorm Watch remains in effect until 800 PM PDT/800 PM
MST/ for northwestern Arizona.

Remember, a Severe Thunderstorm Warning still remains in effect for
portions of westcentral Mohave County and eastern Clark County.

LAT...LON 3570 11358 3547 11468 3629 11493 3670 11438
      3653 11376
TIME...MOT...LOC 1943Z 169DEG 38KT 3649 11458 

$$

JS

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 5, 10:55 AM MST	Severe Thunderstorm Warning	VEF	Mohave	50 min
Oct 5, 11:56 AM MST	Areal Flood Advisory	VEF	Mohave	3 hr
Oct 5, 12:41 PM MST	Severe Thunderstorm Warning	VEF	Mohave	43 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2021 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.