Alert archive / California / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 21, NWS San Diego, CA

September 4, 1997San Bernardino County, California

NWS San Diego, CA issued this severe thunderstorm warning at Sep 4, 1997, 6:02 PM PDT for San Bernardino County, California. It was in force for 28 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, 1997, 6:02 PM PDT (01:02 UTC)
Expired
Sep 4, 1997, 6:30 PM PDT
In force
28 min
Issued by
NWS San Diego, CA
Area
Whole counties

County San Bernardino County, CA

The nearest sounding before it

China Lake (Naf), CA (KNID), launched 00:00Z, 1.0 hours before the alert went out and 159 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, China Lake (Naf), CA at 00:00Z on 1997-09-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 402 joules per kilogram.LCLLFCEL10008507005003002001001 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, China Lake (Naf), CA at 00:00Z on 1997-09-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 square meters per square second.19395878Sfc1 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
402 J/kg
Mixed-layer CIN
-42 J/kg
Mixed-layer LCL
2653 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
12 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

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 4, 5:30 PM PDTFlash Flood WarningSGXSan Bernardino30 min
Sep 4, 5:30 PM PDTSevere Thunderstorm WarningSGXSan Bernardino30 min
Sep 4, 6:02 PM PDTFlash Flood WarningSGXSan Bernardino28 min
Sep 4, 6:30 PM PDTFlash Flood WarningSGXSan Bernardino30 min
Sep 5, 1:17 PM PDTFlash Flood WarningSGXSan Diego58 min
Sep 5, 1:17 PM PDTSevere Thunderstorm WarningSGXSan Diego58 min
Sep 5, 2:12 PM PDTFlash Flood WarningSGXSan Diego63 min
Sep 5, 2:12 PM PDTSevere Thunderstorm WarningSGXSan Diego63 min
Sep 5, 2:24 PM PDTFlash Flood WarningSGXRiverside66 min
Sep 5, 2:24 PM PDTSevere Thunderstorm WarningSGXRiverside66 min
Sep 5, 3:15 PM PDTFlash Flood WarningSGXSan Diego60 min
Sep 5, 3:15 PM PDTSevere Thunderstorm WarningSGXSan Diego60 min
Sep 5, 3:27 PM PDTFlash Flood WarningSGXRiverside63 min
Sep 5, 3:27 PM PDTSevere Thunderstorm WarningSGXRiverside63 min
Sep 5, 4:14 PM PDTFlash Flood WarningSGXSan Diego61 min
Sep 5, 4:14 PM PDTSevere Thunderstorm WarningSGXSan Diego61 min

Nearby

Severe Thunderstorm Warnings in California, 1997Every severe thunderstorm warning in 1997

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.