Alert archive / California / Tornado Warnings in 2001

Tornado Warning 4, NWS Las Vegas, NV

July 7, 2001San Bernardino County, California

NWS Las Vegas, NV issued this tornado warning at Jul 7, 2001, 1:35 PM PDT for San Bernardino County, California. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Jul 7, 2001, 1:35 PM PDT (20:35 UTC)
Expired
Jul 7, 2001, 2:15 PM PDT
In force
40 min
Issued by
NWS Las Vegas, NV
Area
Whole counties; the outline is the Mesonet’s reconstruction

County San Bernardino County, CA

The nearest sounding before it

San Diego, CA (KNKX), launched 12:00Z, 8.6 hours before the alert went out and 182 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-pSkew-T log-p diagram, San Diego, CA at 12:00Z on 2001-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, San Diego, CA at 12:00Z on 2001-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1819 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
35 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 
WFUS55 KVEF 072036
TORLAS

CAC071-072115-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
135 PM PDT SAT JUL 7 2001

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTH CENTRAL SAN BERNARDINO COUNTY IN SOUTHEAST CALIFORNIA
  THIS INCLUDES THE 

* UNTIL 215 PM PDT

* AT 133 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT
  THE CLUSTER OF STORMS THAT PRODUCED A TORNADO NORTH OF JOSHUA TREE 
  STARTING TO REINTENSIFY AFTER TEMPORARILY WEAKENING. THESE STORMS 
  EXTENDED ABOUT 6 MILES NORTHWEST TO SOUTHWEST OF TWENTYNINE PALMS
  ...AND WERE MOVING NORTHEAST NEAR 20 MPH.

IF YOU ARE CAUGHT IN THE PATH qOF THESE DANGEROUS STORMS...SEEK SHELTER 
IN A NEARBY STURDY OR REINFORCED BUILDING. 

LAT...LON 3429 11642 3417 11632 3420 11616 3437 11623

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 7, 12:49 PM PDTFlash Flood WarningVEFSan Bernardino3 hr
Jul 7, 12:53 PM PDTTornado WarningVEFSan Bernardino27 min
Jul 7, 4:26 PM PDTFlash Flood WarningVEFInyo, San Bernardino3 hr

Nearby

Tornado Warnings in California, 2001Every tornado warning in 2001Tornadoes in 2001

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.