Alert archive / South Dakota / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 18, NWS Sioux Falls, SD

May 18, 1996McCook County, Minnehaha County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 18, 1996, 10:59 PM CDT for McCook County, Minnehaha County, South Dakota. It was in force for 31 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: May 18, 1996, 10:59 PM CDT (03:59 UTC)
Expired: May 18, 1996, 11:30 PM CDT
In force: 31 min
Issued by: NWS Sioux Falls, SD
Area: Whole counties

Counties McCook County, SD, Minnehaha County, SD

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 4.0 hours before the alert went out and 172 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2021 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 100 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KFSD 190400
SVRFSD
SDC087-099-190430-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1059 PM CDT SAT MAY 18 1996

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1130 PM CDT 
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHEAST SOUTH DAKOTA

   ...SOUTHEASTERN MCCOOK COUNTY
   ...SOUTHWESTERN MINNEHAHA COUNTY
 
AT 1057 PM CDT...A SEVERE THUNDERSTORM WAS DETECTED BY SIOUX FALLS
DOPPLER RADAR 27 MILES WEST OF SIOUX FALLS  OR 5 MILES SOUTH OF
CANISTOTA MOVING EAST AT 35 MPH.

THIS STORM CAN BE EXPECTED IN THE VICINITY OF...
PUMPKIN CENTER           AROUND 1110 PM CDT
WALL LAKE                AROUND 1120 PM CDT
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.  FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS.

REMEMBER...SEVERE THUNDERSTORMS CAN AND OFTEN DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  A TORNADO WATCH REMAINS IN 
EFFECT UNTIL 1 AM CDT.

CHAPMAN

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 18, 8:22 PM CDT	Severe Thunderstorm Warning	FSD	Brule	43 min
May 18, 8:39 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix	46 min
May 18, 9:02 PM CDT	Tornado Warning	FSD	Brule	33 min
May 18, 9:33 PM CDT	Severe Thunderstorm Warning	FSD	Miner, Sanborn	27 min
May 18, 9:40 PM CDT	Severe Thunderstorm Warning	FSD	Brookings	45 min
May 18, 10:20 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Charles Mix	45 min
May 18, 10:41 PM CDT	Tornado Warning	FSD	Brookings	34 min
May 18, 11:25 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Minnehaha, Turner	30 min
May 18, 11:57 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln	28 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1996 Every severe thunderstorm warning in 1996

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.