Alert archive / South Dakota / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 71, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 20, 1990, 6:07 PM CDT for Minnehaha County, South Dakota. It was in force for 26 min.
The area
The counties it named.
The facts
- Issued
- Jun 20, 1990, 6:07 PM CDT (23:07 UTC)
- Expired
- Jun 20, 1990, 6:33 PM CDT
- In force
- 26 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Minnehaha 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, 11.1 hours before the alert went out and 187 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
- 2148 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 53 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 202308
SVRFSD
MNC133-SDC099-210000-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
607 PM CDT WED JUN 20 1990
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 700 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN SOUTHWEST MINNESOTA
...ROCK
IN SOUTHEAST SOUTH DAKOTA
...NORTHEASTERN MINNEHAHA
SOME CITIES INCLUDED IN THIS WARNING ARE SHERMAN...BEAVER CREEK...AND
LUVERNE.
AT 602 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 15 MILES NORTHEAST
OF SIOUX FALLS NEAR SHERMAN SOUTH DAKOTA MOVING SOUTHEAST AT 55 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 HEAVY
RAIN THAT CAN QUICKLY FLOOD A LOW LYING AREA.
THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE
OR NO ADVANCE WARNING SO BE ON THE LOOKOUT.
RYRHOLMWhat 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, Jun 20, 4:55 PM CDT, 1 hour 12 minutes before
SDZ018-202245- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 455 PM CDT WED JUN 20 1990 ...THUNDERSTORMS MOVING INTO A PART OF SOUTHEAST SOUTH DAKOTA... AT 450 PM CDT SEVERAL STRONG THUNDERSTORMS WERE MOVING INTO NORTHERN LAKE COUNTY IN SOUTHEAST SOUTH DAKOTA. THE STRONGEST THUNDERSTORMS WERE JUST SOUTHWEST OF OLDHAM AND NEAR RAMONA OR ABOUT 40 TO 50 MILES NORTHWEST OF SIOUX FALLS. THESE THUNDERSTORMS COULD AFFECT PARTS OF LAKE AND MOODY COUNTIES INCLUDING THE CITIES OF MADISON AND COLMAN BY ABOUT 530 PM CDT. OTHER THUNDERSTORMS WERE DEVELOPING SOUTH OF MITCHELL. THE THUNDERSTORMS ARE CAPABLE OF PRODUCING STRONG GUSTY WINDS...SOME SMALL HAIL...AND HEAVY RAIN AS THEY MO;VE EAST/SOUTHEAST AT 30 MPH. RYRHOLM
Special weather statement, Jun 20, 5:40 PM CDT, 27 minutes before
SDZ018-202330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 530 PM CDT WED JUN 20 1990 ...THUNDERSTORMS NORTH OF SIOUX FALLS PRODUCE HAIL... AT 520 PM CDT RADAR SHOWED THUNDERSTORMS 30 NORTHNORTHWEST OF SIOUX FALLS TO 30 NORTHNORTHEAST OF SIOUX FALLS BETWEEN MADISON AND TRENT SOUTH DAKOTA MOVING SOUTHEAST AT 55 MPH. AT 520 PM CDT MARBLE SIZE HAIL WAS REPORTED AT MADISON SOUTH DAKOTA. THESE THUNDERSTORMS MAY PRODUCE DANGEROUS CLOUD TO GROUND LIGHTNING... SMALL HAIL...GUSTY WINDS AND BRIEF HEAVY RAINS. THESE THUNDERSTORMS ARE EXPECTED TO PASS NEAR DELL RAPIDS...SHERMAN AND GARRETSON SOUTH DAKOTA AROUND 6 PM CDT. THE THUNDERSTORMS WILL MOVE OVER SOUTHWEST MINNESOTA NEAR LUVERNE AROUND 630 PM CDT. PERSONS IN THESE AREAS SHOULD BE PREPARED FOR ANY ADVERSE WEATHER THESE THUNDERSTORMS MAY BRING. MOVE TO A SAFE PLACE IF NECESSARY. KEEP UP WITH THE LATEST WEATHER INFORMATION. BLOOM
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.