Alert archive / South Dakota / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 4, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at May 18, 1990, 5:21 PM CDT for Bon Homme County, Charles Mix County, South Dakota. It was in force for 39 min.
The area
The counties it named.
The facts
- Issued
- May 18, 1990, 5:21 PM CDT (22:21 UTC)
- Expired
- May 18, 1990, 6:00 PM CDT
- In force
- 39 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Bon Homme County, SD, Charles Mix County, SD
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Aberdeen, SD (KHON), launched 12:00Z, 10.4 hours before the alert went out and 201 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1629 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 134 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KFSD 182221
SVRFSD
SDC009-023-182300-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
521 PM CDT FRI MAY 18 1990
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 600 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN SOUTHEAST SOUTH DAKOTA
...WESTERN BON-HOMME
IN SOUTH CENTRAL SOUTH DAKOTA
...SOUTHEASTERN CHARLES-MIX
SOME CITIES INCLUDED IN THIS WARNING ARE...WAGNER AND AVON.
AT 515 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE HAIL
OVER SOUTHEAST CHARLES-MIX COUNTY OF SOUTH DAKOTA. THE STORM WAS
LOCATED 75 MILES SOUTHWEST OF SIOUX FALLS JUST SOUTHEAST OF PICKSTOWN.
THE STORM WAS MOVING NORTHEAST AT 40 MPH.
IF YOU ARE IN THE PATH OF THIS STORM...YOU SHOULD GET TO A
REINFORCED SHELTER. A SEVERE THUNDERSTORM PRODUCES WINDS IN EXCESS
OF 60 MPH...HAIL 3/4 INCH OR LARGER...DEADLY LIGHTNING...AND H_EAVY
RAIN THAT CAN QUICKLY FLOOD A LOW LYING AREA.What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, May 18, 3:51 PM CDT, 1 hour 30 minutes before
SDZ018-020-052150 SOUTH DAKOTA SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 350 PM CDT FRI MAY 18 1990 ...THUNDERSTORMS MOVING TOWARDS VERMILLION SOUTH DAKOTA... AT 340 PM CDT SIOUX FALLS RADAR HAD THUNDERSTORMS DEVELOPING IN NORTHEAST NEBRASKA JUST SOUTHWEST OF VERMILLION SOUTH DAKOTA. THE THUNDERSTORMS WERE MOVING RAPIDLY NORTHEAST AT 45 MILES AN HOUR AND WILL BE IN VERMILLION BETWEEN 4 PM AND 415 PM CDT. NO SEVERE WEATHER IS CURRENTLY ASSOCIATED WITH THESE THUNDERSTORMS ...HOWEVER THEY DO CONTAIN HEAVY RAIN...GUSTY WINDS AND POSSIBLY SOME SMALL HAIL. BLAIR
Special weather statement, May 18, 4:18 PM CDT, 1 hour 3 minutes before
SDZ016>020-182215- SOUTH DAKOTA SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 417 PM CDT FRI MAY 18 1990 ...THUNDERSTORMS DEVELOPING RAPIDLY ACROSS SOUTHEAST SOUTH DAKOTA... AT 410 PM CDT RADAR INDICATED AN AREA RAPIDLY DEVELOPIMG THUNDERSTORMS OVER SOUTHEAST SOUTH DAKOTA. THE STRONGEST STORMS WERE LOCATED 50 MILES SOUTH OF SIOUX FALLS NEAR VERMILLION...40 MILES WEST OF SIOUX FALLS NEAR ALEXANDRIA SOUTH DAKOTA...AND 20 MILES NORTHWEST OF MITCHELL SOUTH DAKOTA NEAR PLANKINTON. THE STORMS WERE MOVING EAST NORTHEAST AT 40 MPH. THESE STORMS ARE CAPABLE OF PRODUCING BRIEF HEAVY RAINS...GUSTY WINDS AND DANGEROUS CLOUD TO GROUND LIGHTNING. PERSONS ACROSS SOUTHEAST SOUTH DAKOTA SHOULD KEEP ABREAST OF THE WEATHER SITUATION DUE TO THE RAPID DEVELOPMENT OF THUNDERSTORMS.
Special weather statement, May 18, 4:47 PM CDT, 34 minutes before
SDZ016>020-182215- SOUTH DAKOTA SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 445 PM CDT FRI MAY 18 1990 ...NUMEROUS THUNDERSTORMS POPPING UP OVER SOUTHEAST SOUTH DAKOTA.... AT 440 PM CDT RADAR INDICATED AN AREA RAPIDLY DEVELOPIMG THUNDERSTORMS OVER SOUTHEAST SOUTH DAKOTA. THE AREA WAS LOCATED SOUTHWEST OF A LINE FROM 70 MILES WEST NORTHWEST OF SIOUX FALLS NEAR LETCHER SOUTH DAKOTA TO 15 MILES SOUTHEAST OF SIOUX FALLS NEAR INWOOD IOWA. THE STRONGEST STORMS WERE LOCATED 40 MILES SOUTHEAST OF SIOUX FALLS NEAR ALCHESTER SOUTH DAKOTA...55 MILES SOUTHWEST OF SIOUX FALLS NEAR YANKTON...75 MILES WEST SOUTHWEST OF SIOUX FALLS NEAR LAKE ANDES... AND 15 MILES EAST OF MITCHELL NEAR ALEXANDRIA. THNDERSTORMS HAVE ALSO DEVELOPED IN AND AROUND SIOUX FALLS. THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING GUSTY WINDS...BRIEF HEAVY RAINS...SMALL HAIL AND DANGEROUS CLOUD TO GROUND LIGHTNING AS THEY MOVE NORTHEAST AT 40 MPH. 0PERSONS ACROSS SOUTHEAST SOUTH DAKOTA...NORTHWEST IOWA AND SOUTHWEST MINNESOTA SHOULD KEEP ABREAST OF THE WEATHER SITUATION AND BE PREPARED TO SEEK SHELTER IF THREATENING WEATHER APPROACHES.
Special weather statement, May 18, 4:58 PM CDT, 23 minutes before
IAZ-004-182040- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 457 PM CDT FRI MAY 18 1990 ...THUNDERSTORMS ARE MOVING ACROSS THURSTON COUNTY LATE THIS AFTERNOON... AT 452 PM CDT RADAR INDICATED A THUNDERSTORM NEAR WINNEBAGO NEBRASKA. THE STORM WILL PRODUCE HEAVY RAINFALL...DANGEROUS LIGHTNING AND SMALL HAIL. IF YOU LIVE IN THURSTON COUNTY NEBRASKA...SOUTHERN WOODBURY OR NORTHERN MONONA COUNTY IOWA THEN YOU SHOULD KEEP TRACK OF CHANGING WEATHER CONDITIONS. HOPPES
Special weather statement, May 18, 5:16 PM CDT, 5 minutes before
IAZ-004-182040- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 515 PM CDT FRI MAY 18 1990 ...THUNDERSTORMS ARE MOVING ACROSS SOUTHERN WOODBURY COUNTY LATE THIS AFTERNOON... AT 5:09 PM CDT WOODBURY CONSERVATION OFFICER REPORTED PEA SIZE HAIL IN SALIX IOWA. THE THUNDERSTORM PRODUCING THE HAIL WAS MOVING EAST AT 35 MPH. IF YOU LIVE IN SOUTHERN WOODBURY COUNTY THEN YOU SHOULD EXPECT HEAVY RAIN...DANGEROUS LIGHTNING AND SMALL HAIL. THE THUNDERSTORMS WILL MOVE OUT OF WOODBURY COUNTY BY 6:15 PM HOPPES
Special weather statement, May 18, 5:19 PM CDT, 2 minutes before
SDZ016>020-IAZ001-MNZ017-182315- SOUTH DAKOTA SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 518 PM CDT FRI MAY 18 1990 ...NUMEROUS THUNDERSTORMS POPPING UP OVER SOUTHEAST SOUTH DAKOTA.... AT 5 PM CDT SHOWERS AND THUNDERSTORMS SOME WITH VERY HEAVY RAIN CONTINUED ACROSS SOUTHEAST SOUTH DAKOTA. STRONGEST THUNDERSTORMS WERE IN A LINE 20 MILES WIDE THAT EXTENDED FROM 50 MILES NORTHWEST OF YANKTON NEAR ARMOUR TO 55 MILES SOUTH OF SIOUX FALLS NEAR VERMILLION. THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING GUSTY WINDS...BRIEF HEAVY RAIN AND DANGEROUS CLOUD TO GROUND LIGHTNING. OTHER SHOWERS AND THUNDERSTORMS...SOME WITH BRIEF HEAVY RAIN WERE SCATTERED FROM 30 MILES SOUTHEASTY OF HURON TO 50 MILES SOUTHEAST OF SIOUX FALLS NEAR SANBORN IOWA. MOVEMENT WAS NORTHEAST AT 40 MILES AN HOUR. SHEEHAN
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 6:04 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme | 26 min |
| May 18, 6:31 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme | 29 min |
| May 18, 6:44 PM CDT | Severe Thunderstorm Warning | FSD | Yankton | 31 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 1990Every severe thunderstorm warning in 1990
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.