Alert archive / South Dakota / Tornado Warnings in 1989
Tornado Warning 7, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Aug 21, 1989, 10:58 PM CDT for Brookings County, South Dakota. It was in force for 32 min.
The area
The counties it named.
The facts
- Issued
- Aug 21, 1989, 10:58 PM CDT (03:58 UTC)
- Expired
- Aug 21, 1989, 11:30 PM CDT
- In force
- 32 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Brookings 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 00:00Z, 4.0 hours before the alert went out and 140 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
- 383 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 2740 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 46 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KFSD 220401
TORFSD
SDC011-220430-
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1058 PM CDT MON AUG 21 1989
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 1130 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN EAST CENTRAL SOUTH DAKOTA
...EAST CENTRAL BROOKINGS
AT 1055 PM CDT RADAR INDICATED A POSSIBLE TORNADO 5 MILES NORTHEAST OF
BROOKINGS SOUTH DAKOTA MOVING EAST AT 25 MPH.
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT. GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM
SUCH AS A CLOSET ON THE LOWEST FLOOR. USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY. AVOID WINDOWS.
DO NOT USE YOUR CAR TO TRY TO OUTRUN A TORNADO. IF YOU ARE CAUGHT
IN THE PATH OF A TORNADO...LEAVE THE CAR AND GO TO A STRONG
BUILDING. IF NO STRUCTURE IS NEARBY...SEEK SHELTER IN A DITCH OR
LOW SPOT.
IF YOU LIVE IN A HOME OR APARTMENT...SEEK SHELTER IN THE
INNERMOST PORTION OF THE BUILDING ON THE LOWEST FLOOR. IF YOU LIVE
IN A MOBILE HOME...IF POSSIBLE...ABANDON IT FOR A STRONGER SHELTER.
BLOOMWhat forecasters said that day
The local office's own words before this tornado 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, Aug 21, 6:41 PM CDT, 4 hours 17 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HURON SD 635 PM CDT MON AUG 21 1989 AT 635 PM CDT...SEVERE THUNDERSTORMS MOVED OVER PARTS OF HAMLIN AND DEULE COUNTIES DURING THE LAST TWO HOURS. THESE STORMS DUMPED VERY HEAVY RAINS AND LARGE HAIL. NO REPORTS OF RAINFALL HAVE BEEN RECEIVED BY THE NATIONAL WEATHER SERVICE...HOWEVER 4 TO 6 INCHES OF RAINFALL HAVE BEEN ESTIMATED. DUE TO THE LARGE AMOUNTS OF RAIN...DITCHES AND PASTURES HAVE BEEN AND ARE FILLING RAPIDLY. IF YOU ARE IN THIS AREA YOU SHOULD REMAIN ALERT FOR QUICKLY RISING WATERS. PLEASE DO NOT ATTEMPT TO DRIVE OR WALK THROUGH ANY AREA OF SWIFTLY MOVING OR RISING WATERS. EDDY/MILLER
Special weather statement, Aug 21, 6:42 PM CDT, 4 hours 16 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HURON SD 635 PM CDT MON AUG 21 1989 AT 635 PM CDT...SEVERE THUNDERSTORMS MOVED OVER PARTS OF HAMLIN AND DEULE COUNTIES DURING THE LAST TWO HOURS. THESE STORMS DUMPED VERY HEAVY RAINS AND LARGE HAIL. NO REPORTS OF RAINFALL HAVE BEEN RECEIVED BY THE NATIONAL WEATHER SERVICE...HOWEVER 4 TO 6 INCHES OF RAINFALL HAVE BEEN ESTIMATED. DUE TO THE LARGE AMOUNTS OF RAIN...DITCHES AND PASTURES HAVE BEEN AND ARE FILLING RAPIDLY. IF YOU ARE IN THIS AREA YOU SHOULD REMAIN ALERT FOR QUICKLY RISING WATERS. PLEASE DO NOT ATTEMPT TO DRIVE OR WALK THROUGH ANY AREA OF SWIFTLY MOVING OR RISING WATERS. EDDY/MILLER
Local storm report, Aug 21, 6:47 PM CDT, 4 hours 11 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
645 PM CDT MON AUG 21 1989
STORM DATA FOR IOWA
TIME COUNTY..LOCATION CHARACTER OF STORM..DAMAGE
.......................................................................
540 PM CDT SIOUX GOLF BALL SIZE HAIL AND
STRONG WINDS 5 MILES WEST
OF ROCK VALLEY
554 PM CDT SIOUX ESTIMATED 60 MPH WIND AND
VERY HEAVY RAIN/ VISIBILITY
1/8 MILE/ 6 MILES NORTHWEST
OF SIOUX CENTER
557 PM CDT SIOUX TREES DOWN ALL OVER SIOUX
CENTER
600 PM CDT SIOUX 53 MPH WINDS AT SIOUX CENTER
605 PM CDT SIOUX 61 MPH WINDS AT SIOUX CENTER
610-620 PM CDT SIOUX MARBLE SIZE HAIL AT SIOUX
CENTER
620 PM CDT SIOUX ELECTRICITY OUT 1 MILE EAST
OF SIOUX CENTER
620 PM CDT SIOUX 1.50 INCHES OF RAIN IN 1/2
HOUR AT SIOUX CENTER
WILLIAMSSpecial weather statement, Aug 21, 7:40 PM CDT, 3 hours 18 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HURON SD
740 PM CDT MON AUG 21 1989
...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR A LARGE PART OF
EASTERN SOUTH DAKOTA UNTIL 10 PM CDT TONIGHT...
AT 725 PM CDT...NUMEROUS THUNDERSTORMS...SOME WITH VERY HEAVY RAIN
CONTINUED OVER EXTREME NORTHEASTERN SOUTH DAKOTA...CENTRAL MINNESOTA
AND NORTHEAST NORTH DAKOTA.
IN SOUTH DAKOTA THE THUNDERSTORMS WERE WITHIN A 20 MILE RADIUS OF
MILBANK...LOCATED 25 MILES NORTHEAST OF WATERTOWN. THESE STORMS WERE
DECREASING IN INTENSITY...BUT THEY ARE STILL CAPABLE OF HEAVY RAIN...
SMALL HAIL...GUSTY WIND AND DANGEROUS LIGHTNING.
THESE STORMS WERE MOVING NORTHEAST AT 25 MILES AN HOUR AND SOULD {BE OUT
OF THE STATE BY 830 PM CDT.
HUTCHEONSpecial weather statement, Aug 21, 7:47 PM CDT, 3 hours 11 minutes before
SPECIAL WEATHER STATEMENT...CORRECTED... NATIONAL WEATHER SERVICE HURON SD 746 PM CDT MON AUG 21 1989 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR A SMALL PORTION OF NORTHEASTERN SOUTH
Local storm report, Aug 21, 8:22 PM CDT, 2 hours 36 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE HURON SD
800 PM CDT MON AUG 21 1989
STORM DATA FOR MON AUG 21 1989
TIME COUNTY...LOCATION CHARACTER OF STORM...DAMAGE
450 PM HAMLIN COUNTY MARBLE SIZE HAIL.
7 MI EAST OF BRYANT
450 PM HAMLIN COUNTY HAIL PILED UP.
7 1/2 MI E ESTELLINE.
602 PM CODINGTON COUNTY... PEA TO MARBLE SIZE HAIL.
FLORENCE...10 NW ATY
604 PM HAMLIN COUNTY 3 1/2 FEET WATER IN PASTURES.
7 1/2 MI N OF ESTELLINE
606 PM CODINGTON COUNTY GOLFBALL SIZE HAIL.
2 1/2 E OF FLORENCE
611 PM CODINGTON COUNTY LARGER THAN GOLFBALL SIZE HAIL.
FLORENCE...10 NW ATY
640 PM CODINGTON COUNTY BASEBALL SIZE HAIL. 40% OF
2 1/2 NE KRANZBURG YARD COVERED. 1.25 RAIN.
700 PM GRANT COUNTY HEAVY RAIN. PEA SIZE HAIL.
4 WSW TWIN BROOKS
700 PM GRANT COUNTY PEA SIZE HAIL. HEAVY RAIN.
MILBANK WND EST 30 TO 40 MPH.
707 PM GRANT COUNTY MARBLE SIZE HAIL. GROUND WHITE.
4 MI S MILBANK
710 PM GRANT COUNTY 3/4 IN HAIL. HEAVY RAIN.
1 NW MILBANK WIND EST 40-50 MPH.
MILLER/HUTCHEONNearby
Tornado Warnings in South Dakota, 1989Every tornado warning in 1989Tornadoes in 1989
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.