Alert archive / South Dakota / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 21, NWS Rapid City, SD

May 14, 1991Butte County, Lawrence County, Meade County, South Dakota

NWS Rapid City, SD issued this severe thunderstorm warning at May 14, 1991, 8:24 PM MDT for Butte County, Lawrence County, Meade County, South Dakota. It was in force for 36 min.

The area

The counties it named.

The facts

Issued
May 14, 1991, 8:24 PM MDT (02:24 UTC)
Expired
May 14, 1991, 9:00 PM MDT
In force
36 min
Issued by
NWS Rapid City, SD
Area
Whole counties

Counties Butte County, SD, Lawrence County, SD, Meade County, SD

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 2.4 hours before the alert went out and 316 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 00:00Z on 1991-05-15Temperature 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, Bismarck Municip, ND at 00:00Z on 1991-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 177 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
2593 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
177 m²/s²
0-3 km storm-relative helicity
481 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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 Rapid City, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 14, 7:19 PM MDTSevere Thunderstorm WarningUNRLawrence26 min
May 14, 8:58 PM MDTSevere Thunderstorm WarningUNRMeade47 min
May 15, 3:10 PM MDTSevere Thunderstorm WarningUNRBennett50 min
May 14, 8:35 PM MDTSevere Thunderstorm WarningUNRWeston40 min
May 14, 8:51 PM MDTSevere Thunderstorm WarningUNRConverse54 min
May 14, 9:23 PM MDTSevere Thunderstorm WarningUNRConverse52 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1991Every severe thunderstorm warning in 1991

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.