Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 19, NWS Las Vegas, NV

July 13, 2021Mohave County, Arizona

NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 13, 2021, 8:29 PM MST for Mohave County, Arizona. It was in force for 91 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, 8:29 PM MST (03:29 UTC)
Expired: Jul 13, 2021, 10:00 PM MST
In force: 91 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 Cedar City radar (KICX), 101 km from the middle of the area, began a volume at 03:33 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, 8:55 PM MST	TSTM WND DMG	1 N Littlefield, AZ	CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 1 N LITTLEFIELD. WINDS RESULTING IN FALLEN TREES BLOCKING ROADWAYS AND TREES FALLING ON POWER LINES RESULTING IN POWER OUTAGES. REPORTS OF TRAMPOLINES BEING BLOWN INTO ROADWAYS.

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, 3.5 hours before the alert went out and 208 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.

151 
WUUS55 KVEF 140329
SVRVEF
AZC015-140500-
/O.NEW.KVEF.SV.W.0019.210714T0329Z-210714T0500Z/

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

The National Weather Service in Las Vegas has issued a

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

* Until 1000 PM MST.

* At 829 PM MST, a severe thunderstorm was located over Littlefield,
  moving southeast at 15 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs and trees.

* Locations impacted include...
  Colorado City, Virgin River Gorge, Beaver Dam, Littlefield, Virgin
  River Campground, Kaibab and Pipe Spring.

This includes Interstate 15 in Arizona between mile markers 0 and 2,
and between mile markers 4 and 29.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3660 11301 3629 11362 3673 11405 3700 11405
      3700 11254 3698 11254
TIME...MOT...LOC 0329Z 331DEG 14KT 3689 11387 

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

CP

1 follow-up statement

652 
WWUS55 KVEF 140452
SVSVEF

Severe Weather Statement
National Weather Service Las Vegas NV
952 PM MST Tue Jul 13 2021

AZC015-140501-
/O.EXP.KVEF.SV.W.0019.000000T0000Z-210714T0500Z/
Mohave AZ-
952 PM MST Tue Jul 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MOHAVE COUNTY
WILL EXPIRE AT 1000 PM MST...
        
The storms which prompted the warning have weakened below severe 
limits. Therefore, the warning will be allowed to expire.  However 
gusty winds to 50 mph are still possible.

LAT...LON 3660 11301 3629 11362 3673 11405 3700 11405
      3700 11254 3698 11254
TIME...MOT...LOC 0451Z 331DEG 14KT 3663 11369 

$$

CP

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 7:24 PM MST	Severe Thunderstorm Warning	VEF	Mohave	96 min
Jul 13, 8:52 PM MST	Severe Thunderstorm Warning	VEF	Mohave	53 min
Jul 14, 10:59 AM MST	Flash Flood Watch	VEF	Mohave	13 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.