Alert archive / California / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 21, NWS Las Vegas, NV

July 4, 2006San Bernardino County, California; Mohave County, Arizona

NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 4, 2006, 4:02 PM PDT for San Bernardino County, California; Mohave County, Arizona. It was in force for 25 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 4, 2006, 4:02 PM PDT (23:02 UTC)
Expired: Jul 4, 2006, 4:27 PM PDT
In force: 25 min
Issued by: NWS Las Vegas, NV
Area: Counties, with a storm outline in the text

Counties Mohave County, AZ, San Bernardino County, CA

The radar

The Las Vegas radar (KESX), 103 km from the middle of the area, began a volume at 23:04 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, 11.0 hours before the alert went out and 240 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: 161 J/kg
Mixed-layer CIN: -99 J/kg
Mixed-layer LCL: 1429 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -76 m²/s²
0-3 km storm-relative helicity: -54 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS55 KVEF 042303
SVRVEF
AZC015-CAC071-042345-
/O.NEW.KVEF.SV.W.0021.060704T2302Z-060704T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
402 PM MST TUE JUL 4 2006

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN MOHAVE COUNTY IN NORTHWEST ARIZONA...
  EXTREME EAST CENTRAL SAN BERNARDINO COUNTY IN SOUTHEAST
  CALIFORNIA...

* UNTIL 445 PM MST(445 PM PDT).

* AT 353 PM MST...THE PUBLIC REPORTED A SEVERE THUNDERSTORM CAPABLE
  OF PRODUCING DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THIS STORM WAS
  LOCATED 6 MILES NORTHEAST OF TOPOCK...AND WAS MOVING EAST AT 10
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  YUCCA AROUND 425 PM MST...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

LAT...LON 3494 11467 3456 11456 3477 11394 3512 11414

$$
SC

1 follow-up statement

000 
WWUS55 KVEF 042327
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
424 PM PDT TUE JUL 4 2006

AZC015-CAC071-042334-
/O.CAN.KVEF.SV.W.0021.000000T0000Z-060704T2345Z/
MOHAVE AZ-SAN BERNARDINO CA-
424 PM MST TUE JUL 4 2006

...THE SEVERE THUNDERSTORM WARNING FOR EXTREME EAST CENTRAL SAN
BERNARDINO AND SOUTHWESTERN MOHAVE COUNTIES IS CANCELLED...

THE THUNDERSTORM IN SOUTHWEST MOHAVE COUNTY NEAR TOPOCK HAS WEAKENED 
AND IS NO LONGER SEVERE...THEREFORE THE SEVERE THUNDERSTORM WARNING 
HAS BEEN CANCELLED. BRIEF HEAVY DOWNPOURS...WIND GUSTS TO 50 MPH AND 
DANGEROUS LIGHTNING ARE STILL POSSIBLE WITH THIS STORM.

LAT...LON 3494 11467 3456 11456 3477 11394 3512 11414

$$
SC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 11:03 AM PDT	Flash Flood Watch	VEF		10 hr
Jul 4, 1:29 PM PDT	Flash Flood Warning	VEF	San Bernardino	2 hr
Jul 4, 1:23 PM PDT	Flash Flood Warning	VEF	Mohave	52 min
Jul 4, 3:14 PM PDT	Severe Thunderstorm Warning	VEF	Mohave	46 min

Nearby

Severe Thunderstorm Warnings in California, 2006 Severe Thunderstorm Warnings in Arizona, 2006 Every severe thunderstorm warning in 2006

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.