Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 23, NWS Las Vegas, NV

July 18, 2021Mohave County, Arizona

NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 18, 2021, 3:07 PM MST for Mohave County, Arizona. It was in force for 23 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 18, 2021, 3:07 PM MST (22:07 UTC)
Expired: Jul 18, 2021, 3:30 PM MST
In force: 23 min
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Mohave County, AZ

The radar

The Las Vegas radar (KESX), 154 km from the middle of the area, began a volume at 22:07 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

Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 10.1 hours before the alert went out and 165 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: 191 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 1511 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 46 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

623 
WUUS55 KVEF 182207
SVRVEF
AZC015-182230-
/O.NEW.KVEF.SV.W.0023.210718T2207Z-210718T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Las Vegas NV
307 PM MST Sun Jul 18 2021

The National Weather Service in Las Vegas has issued a

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

* Until 330 PM MST.

* At 305 PM MST, a severe thunderstorm was located 12 miles south of 
  Bar Ten Ranch, over the Colorado River, and was nearly stationary.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs and trees.

* This severe thunderstorm will remain over mainly rural areas of
  central Mohave County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Anyone on the Colorado River just southwest of Tuweep should seek 
shelter immediately.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 3618 11316 3615 11320 3612 11320 3609 11323
      3609 11327 3610 11328 3609 11332 3607 11333
      3605 11335 3601 11335 3616 11346 3625 11315
      3617 11314
TIME...MOT...LOC 2205Z 161DEG 3KT 3610 11326 

HAIL...1.00IN
WIND...60MPH
 
$$

Morgan

1 follow-up statement

322 
WWUS55 KVEF 182222
SVSVEF

Severe Weather Statement
National Weather Service Las Vegas NV
322 PM MST Sun Jul 18 2021

AZC015-182230-
/O.EXP.KVEF.SV.W.0023.000000T0000Z-210718T2230Z/
Mohave AZ-
322 PM MST Sun Jul 18 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MOHAVE COUNTY WILL
EXPIRE AT 330 PM MST...
                
The storm over the Colorado River southwest of Tuweep has weakened a 
bit, so the warning will be allowed to expire. However, other strong 
storms were developing in the same region, so lightning and heavy 
rain are still possible.

LAT...LON 3618 11316 3615 11320 3612 11320 3609 11323
      3609 11327 3610 11328 3609 11332 3607 11333
      3605 11335 3601 11335 3616 11346 3625 11315
      3617 11314
TIME...MOT...LOC 2220Z 161DEG 3KT 3611 11326 

$$

Morgan

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 5:33 PM MST	Severe Thunderstorm Warning	VEF	Mohave	57 min
Jul 18, 1:33 PM MST	Areal Flood Advisory	VEF	Mohave	80 min
Jul 18, 2:51 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Jul 18, 3:14 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Jul 18, 3:46 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.