Alert archive / California / Tornado Warnings in 2003

Tornado Warning 1, NWS San Diego, CA

September 4, 2003San Bernardino County, California

NWS San Diego, CA issued this tornado warning at Sep 4, 2003, 2:08 PM PDT for San Bernardino County, California. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 4, 2003, 2:08 PM PDT (21:08 UTC)
Expired
Sep 4, 2003, 2:45 PM PDT
In force
37 min
Issued by
NWS San Diego, CA
Area
Whole counties

County San Bernardino County, CA

The nearest sounding before it

Mercury/Desert R, NV (KDRA), launched 12:00Z, 9.1 hours before the alert went out and 198 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, Mercury/Desert R, NV at 12:00Z on 2003-09-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Mercury/Desert R, NV at 12:00Z on 2003-09-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 square meters per square second.1939Sfc1 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
2269 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
108 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 
WFUS56 KSGX 042108
TORSGX
CAC071-042145-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
208 PM PDT THU SEP 4 2003

THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A

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

* UNTIL 245 PM PDT

* AT 200 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A   
TORNADO OVER SOUTH CENTRAL SAN BERNARDINO COUNTY...IN THE EAST SIDE OF 
YUCCA VALLEY.

THIS IS AN EXTREMELY DANGEROUS AND POTENTIALLY LIFE THREATENING
SITUATION. IF YOU ARE IN THE PATH OF THIS LARGE AND DESTRUCTIVE
TORNADO...TAKE COVER IMMEDIATELY.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

$$

LAT...LON 3418 11643 3405 11629 3419 11625 3442 11634
          3437 11645

The office that day

Everything else NWS San Diego, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 4, 12:40 PM PDTSevere Thunderstorm WarningSGXSan Diego50 min
Sep 4, 1:06 PM PDTFlash Flood WarningSGXSan Diego84 min
Sep 4, 1:17 PM PDTFlash Flood WarningSGXRiverside88 min
Sep 4, 1:49 PM PDTSevere Thunderstorm WarningSGXSan Diego71 min
Sep 4, 2:07 PM PDTSevere Thunderstorm WarningSGXSan Bernardino53 min
Sep 4, 2:09 PM PDTFlash Flood WarningSGXSan Bernardino81 min
Sep 4, 2:24 PM PDTFlash Flood WarningSGXSan Diego96 min
Sep 4, 2:30 PM PDTFlash Flood WarningSGXRiverside90 min
Sep 4, 3:22 PM PDTSevere Thunderstorm WarningSGXSan Diego23 min
Sep 4, 3:46 PM PDTSevere Thunderstorm WarningSGXSan Diego29 min
Sep 4, 4:04 PM PDTFlash Flood WarningSGXSan Diego116 min
Sep 4, 4:15 PM PDTSevere Thunderstorm WarningSGXSan Diego45 min

Nearby

Tornado Warnings in California, 2003Every tornado warning in 2003Tornadoes in 2003

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.