Alert archive / South Dakota / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 91, NWS Aberdeen, SD

July 18, 1993Brown County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 18, 1993, 6:56 PM CDT for Brown County, South Dakota. It was in force for 49 min.

The area

The counties it named.

The facts

Issued
Jul 18, 1993, 6:56 PM CDT (23:56 UTC)
Expired
Jul 18, 1993, 7:45 PM CDT
In force
49 min
Issued by
NWS Aberdeen, SD
Area
Whole counties

County Brown County, SD

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.9 hours before the alert went out and 223 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, Bismarck Municip, ND at 12:00Z on 1993-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 41 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, Bismarck Municip, ND at 12:00Z on 1993-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 square meters per square second.1939587897Sfc1 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
41 J/kg
Mixed-layer CIN
-105 J/kg
Mixed-layer LCL
873 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
121 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 Aberdeen, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 18, 8:29 AM CDTSevere Thunderstorm WarningABRStanley46 min
Jul 18, 8:55 AM CDTSevere Thunderstorm WarningABRHughes, Sully65 min
Jul 18, 11:22 AM CDTSevere Thunderstorm WarningABRSpink48 min
Jul 18, 4:42 PM CDTSevere Thunderstorm WarningABRWalworth43 min
Jul 18, 6:16 PM CDTSevere Thunderstorm WarningABRSully9 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1993Every severe thunderstorm warning in 1993

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.