Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 67, NWS Las Vegas, NV

August 29, 2021Mohave County, Arizona

NWS Las Vegas, NV issued this severe thunderstorm warning at Aug 29, 2021, 3:15 PM MST for Mohave County, Arizona. It was in force for 32 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: Aug 29, 2021, 3:15 PM MST (22:15 UTC)
Expired: Aug 29, 2021, 3:47 PM MST
In force: 32 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), 49 km from the middle of the area, began a volume at 22:19 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
Aug 29, 3:17 PM MST	TSTM WND DMG	1 Sw Dolan Springs, AZ	13 POWER POLES SNAPPED IN DOLAN SPRINGS ON PIERCE FERRY ROAD FROM SEVERE THUNDERSTORM WIND GUSTS. POWER OUTAGES CONFIRMED BY LOCAL POWER COMPANY. A 5TH WHEEL RV TIPPED OVER. NO INJURIES REPORTED.

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 12:00Z, 10.3 hours before the alert went out and 136 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: 350 J/kg
Mixed-layer CIN: -157 J/kg
Mixed-layer LCL: 3268 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -24 m²/s²
0-3 km storm-relative helicity: -10 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

014 
WUUS55 KVEF 292215
SVRVEF
AZC015-292300-
/O.NEW.KVEF.SV.W.0067.210829T2215Z-210829T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Las Vegas NV
315 PM MST Sun Aug 29 2021

The National Weather Service in Las Vegas has issued a

* Severe Thunderstorm Warning for...
  West central Mohave County in northwestern Arizona...

* Until 400 PM MST.

* At 315 PM MST, a severe thunderstorm was located near Dolan
  Springs, or 27 miles northeast of Katherine Landing, moving
  northwest at 15 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs and trees.

* Locations impacted include...
  Dolan Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3556 11419 3545 11436 3568 11465 3584 11438
TIME...MOT...LOC 2215Z 142DEG 12KT 3557 11433 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

BKP

1 follow-up statement

048 
WWUS55 KVEF 292247
SVSVEF

Severe Weather Statement
National Weather Service Las Vegas NV
347 PM MST Sun Aug 29 2021

AZC015-292256-
/O.CAN.KVEF.SV.W.0067.000000T0000Z-210829T2300Z/
Mohave AZ-
347 PM MST Sun Aug 29 2021

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL MOHAVE COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

LAT...LON 3556 11419 3545 11436 3568 11465 3584 11438
TIME...MOT...LOC 2236Z 142DEG 12KT 3565 11441 

$$

BKP

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 29, 3:43 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Aug 29, 4:18 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	117 min

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.