Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 34, NWS Las Vegas, NV

July 23, 2021Mohave County, Arizona

NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 23, 2021, 10:18 PM MST for Mohave County, Arizona. 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 23, 2021, 10:18 PM MST (05:18 UTC)
Expired: Jul 23, 2021, 11:00 PM MST
In force: 42 min
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Mohave County, AZ

The radar

The Las Vegas radar (KESX), 95 km from the middle of the area, began a volume at 05:17 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 00:00Z, 5.3 hours before the alert went out and 169 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: 139 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 3163 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

349 
WUUS55 KVEF 240518
SVRVEF
AZC015-240600-
/O.NEW.KVEF.SV.W.0034.210724T0518Z-210724T0600Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Las Vegas NV
1018 PM MST Fri Jul 23 2021

The National Weather Service in Las Vegas has issued a

* Severe Thunderstorm Warning for...
  Central Mohave County in northwestern Arizona...

* Until 1100 PM MST.

* At 1017 PM MST, severe thunderstorms were located along a line
  extending from near Meadview to 19 miles north of Valentine to 13
  miles south of Diamond Creek Campground, moving southwest at 40
  mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs and trees.

* Locations impacted include...
  Windy Point Campground, Packsaddle Campground, Grand Canyon Ranch,
  Lake Mead National Recreation Area, Valentine, Grand Canyon
  Skywalk, Dolan Springs, Pierce Ferry And Antares Roads, Diamond M
  Ranch, Meadview and Peach Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Las Vegas.

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.

&&

LAT...LON 3529 11353 3541 11417 3591 11449 3602 11425
      3603 11415 3607 11413 3620 11383 3576 11355
      3572 11333 3527 11333
TIME...MOT...LOC 0517Z 055DEG 33KT 3602 11400 3565 11376 3557 11330 

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

TB3

1 follow-up statement

756 
WWUS55 KVEF 240558
SVSVEF

Severe Weather Statement
National Weather Service Las Vegas NV
1058 PM MST Fri Jul 23 2021

AZC015-240607-
/O.EXP.KVEF.SV.W.0034.000000T0000Z-210724T0600Z/
Mohave AZ-
1058 PM MST Fri Jul 23 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MOHAVE COUNTY WILL
EXPIRE AT 1100 PM MST...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty 
winds up to 50 mph and brief heavy rain are still possible with 
these thunderstorms.

LAT...LON 3529 11353 3541 11417 3591 11449 3602 11425
      3603 11415 3607 11413 3620 11383 3576 11355
      3572 11333 3527 11333
TIME...MOT...LOC 0557Z 055DEG 33KT 3583 11432 3546 11408 3538 11362 

$$

JS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 5:52 PM MST	Severe Thunderstorm Warning	VEF	Mohave	53 min
Jul 23, 7:11 PM MST	Severe Thunderstorm Warning	VEF	Mohave	49 min
Jul 23, 7:58 PM MST	Severe Thunderstorm Warning	VEF	Mohave	23 min
Jul 23, 9:52 PM MST	Severe Thunderstorm Warning	VEF	Mohave	29 min
Jul 23, 11:58 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	2 hr
Jul 24, 1:13 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Jul 24, 1:26 PM MST	Severe Thunderstorm Warning	VEF	Mohave	49 min
Jul 24, 3:18 PM MST	Severe Thunderstorm Warning	VEF	Mohave	57 min
Jul 24, 3:21 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	2 hr

Nearby

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.