Alert archive / Arizona / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 3, NWS Las Vegas, NV

July 12, 2002Mohave County, Arizona; Clark County, Nevada

NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 12, 2002, 5:08 PM MST for Mohave County, Arizona; Clark County, Nevada. It was in force for 57 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 12, 2002, 5:08 PM MST (00:08 UTC)
Expired: Jul 12, 2002, 6:05 PM MST
In force: 57 min
Issued by: NWS Las Vegas, NV
Area: Counties, with a storm outline in the text

Counties Mohave County, AZ, Clark County, NV

The radar

The Las Vegas radar (KESX), 22 km from the middle of the area, began a volume at 00:09 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 12, 4:30 PM MST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Mercury/Desert R, NV (KDRA), launched 00:00Z, 0.1 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: 385 J/kg
Mixed-layer CIN: -129 J/kg
Mixed-layer LCL: 3732 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

654 
WUUS55 KVEF 130008
SVRVEF
AZC015-NVC003-130105-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
505 PM MST FRI JUL 12 2002

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL MOHAVE COUNTY IN NORTHWEST ARIZONA
  THIS INCLUDES THE FOLLOWING LOCATION...BULLHEAD CITY
  SOUTH CENTRAL CLARK COUNTY IN SOUTHERN NEVADA
  THIS INCLUDES THE FOLLOWING LOCATIONS...SEARCHLIGHT...LAUGHLIN...  
  COTTONWOOD COVE...WILLOWBEACH...CAL NEV ARI

* UNTIL 605 PM MST(605 PM PDT)

* AT 505 PM MST(505 PM PDT)...NATIONAL WEATHER SERVICE DOPPLER       
  RADAR INDICATED A SEVERE THUNDERSTORMS DEVELOPING OVER THE         
  LAKE MEAD NATIONAL RECREATION AREA AND EXTREME SOUTHERN            
  NEVADA...MOVING NORTHWEST AT 10 TO 15 MPH.

THIS STORMS HAVE A HISTORY OF PRODUCING STRONG DAMAGING WINDS IN 
EXCESS OF 60 MPH.

IF YOU ARE CAUGHT OUTSIDE...MOVE TO A PLACE OF SAFETY SUCH AS A
NEARBY SHELTER OR BUILDING. BOATERS ON AREA LAKES SHOULD SEEK SAFE
PORT IMMEDIATELY. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND
DEADLY LIGHTNING ARE ALL LIKELY.

LAT...LON 3543 11515 3491 11449 3603 11427 3592 11462

PIERCE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 5:33 PM MST	Severe Thunderstorm Warning	VEF	Clark	87 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2002 Severe Thunderstorm Warnings in Nevada, 2002 Every severe thunderstorm warning in 2002

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.