Alert archive / South Dakota / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 113, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 24, 1987, 2:26 PM CDT for Yankton County, South Dakota. It was in force for 64 min.
The area
The counties it named.
The facts
- Issued
- Jul 24, 1987, 2:26 PM CDT (19:26 UTC)
- Expired
- Jul 24, 1987, 3:30 PM CDT
- In force
- 64 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Yankton 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
Omaha, NE (KOAX), launched 12:00Z, 7.4 hours before the alert went out and 206 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
- 3637 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 109 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 241926
SVRFSD
SDC135-242030-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
226 PM CDT FRI JUL 24 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 330 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
IN SOUTHEAST SOUTH DAKOTA
...SOUTHERN YANKTON
SOME COMMUNITIES INCLUDED IN THIS WARNING ARE UTICA...MISSION HILL...
VOLIN AND YANKTON SOUTH DAKOTA.
THIS WARNING INCLUDES THE ADJACENT WATERS OF THE MISSOURI RIVER.
AT 225 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM 12 MILES WEST
OF YANKTON SOUTH DAKOTA...MOVING EAST AT 25 MILES AN HOUR.
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.
GOLDENWhat 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, Jul 24, 11:07 AM CDT, 3 hours 19 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 1100 AM CDT FRI JUL 24 1987 AT 1130 AM CDT...THERE WERE SCATTERED INTENSE THUNDERSTORMS SOME WITH VERY HEAVY RAIN IN CENTRAL SOUTH DAKOTA. THE THUNDERSTORMS WERE IN A 145 MILE WIDE BAND WHICH EXTENDED FROM THE NORTH DAKOTA BORDER ON THE MISSOURI RIVER SOUTH TO THE NEBRASKA BORDER SOUTH OF WINNER. THE HEAVIEST THUNDERSTORMS WERE IN TRIPP COUNTY JUST WEST OF WINNER WHERE SMALL HAIL AND STRONG WINDS HAD BEEN REPORTED AND 50 MILES NORTH OF PIERRE JUST WEST OF THE MISSOURI RIVER. HAIL AND STRONG WINDS ARE POSSIBLE WITH THESE STORMS. MOVEMENT WAS EAST 30 MILES AN HOUR. REYNOLDS
Special weather statement, Jul 24, 11:30 AM CDT, 2 hours 56 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 1128 AM CDT FRI JUL 24 1987 ...INTENSE THUNDERSTORM MOVING ACROSS NORTHEAST TRIPP COUNTY... AT 1125 AM CDT NATIONAL WEATHER SERVICE RADAR INDICATED AN INTENSE THUNDERSTORM WITH HEAVY RAINS MOVING ACROSS NORTHEAST TRIPP COUNTY OF SOUTH DAKOTA. THE STORM WAS LOCATED AROUND 15 MILES NORTHEAST OF WINNER SOUTH DAKOTA. MOVEMENT WAS EAST AT 30 MPH. THIS STORM WILL BE MOVING INTO SOUTHERN LYMAN AND SOUTHWEST BRULE COUNTIES DURING THE NEXT HOUR. IN ADDITION TO THE HEAVY RAINS...SMALL HAIL...GUSTY WINDS AND DANGEROUS CLOUD TO GROUND LIGHTNING ARE POSSIBLE WITH THIS STORM. JANSEN
Special weather statement, Jul 24, 11:38 AM CDT, 2 hours 48 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 1135 AM CDT FRI JUL 24 1987 AT 1125 AM CDT...THERE WERE SCATTERED INTENSE THUNDERSTORMS SOME WITH VERY HEAVY RAIN IN CENTRAL SOUTH DAKOTA. THE THUNDERSTORMS WERE IN A 130 MILE WIDE BAND WHICH EXTENDED FROM THE NORTH DAKOTA BORDER 30 MILES NORTHEAST OF MOBRIDGE SOUTH TO THE NEBRASKA BORDER SOUTH OF WINNER. THE HEAVIEST THUNDERSTORMS WERE ON THE BORDER OF FAULK AND POTTER COUNTIES 55 MILES NORTHEAST OF PIERRE. THIS THUNDERSTORM IS HEADING FOR ONAKA AND NORBECK. ANOTHER HEAVY THUNDERSTORM WHICH HAD DECREASED SLIGHTLY IN INTENSITY IS JUST WEST OF WINNER. LIGHTENING SMALL HAIL AND STRONG WIND ARE ASSOCIATED WITH THESE STORMS. MOVEMENT WAS EAST 30 MILES AN HOUR. REYNOLDS
Special weather statement, Jul 24, 12:14 PM CDT, 2 hours 12 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 1212 PM CDT FRI JUL 24 1987 ...INTENSE THUNDERSTORM MOVING ACROSS NORTHEAST TRIPP COUNTY... AT 1210 PM CDT NATIONAL WEATHER SERVICE RADAR INDICATED AN INTENSE THUNDERSTORM WITH HEAVY RAINS MOVING ACROSS NORTHEAST TRIPP COUNTY OF SOUTH DAKOTA. THE STORM WAS LOCATED AROUND 20 MILES NORTHEAST OF WINNER SOUTH DAKOTA ALONG THE TRIPP/LYMAN COUNTY LINE. THIS STORM WAS MOVING EAST AT 15 MPH. THIS STORM WILL BE MOVING ACROSS SOUTHERN LYMAN AND INTO SOUTHWEST BRULE COUNTIES DURING THE NEXT HOUR. SMALL HAIL...GUSTY WINDS AND DANGEROUS CLOUD TO GROUND LIGHTNING ARE LIKELY WITH THIS STORM. DUE TO THE SLOW MOVEMENT FLOODING OF LOW LYING AREAS IS POSSIBLE WITH THIS STORM. JANSEN
Special weather statement, Jul 24, 1:02 PM CDT, 1 hour 24 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 1255 PM CDT FRI JUL 24 1987 AT 1235 PM CDT...THERE WERE SCATTERED INTENSE THUNDERSTORMS SOME WITH VERY HEAVY RAIN IN CENTRAL SOUTH DAKOTA. THE THUNDERSTORMS WERE MOSTLY WEST OF THE JAMES RIVER FROM THE NORTH DAKOTA BORDER SOUTH TO THE NEBRASKA BORDER. THE STRONGEST THUNDERSTORMS WERE LOCATED 10 MILES EAST OF WINNER...10 MILES SOUTH OF MITCHELL AND JUST SOUTH OF THE BORDER AT PICKSTOWN. ALSO STRONG THUNDERSTORMS WERE AGAIN DEVELOPING 20 MILES WEST OF MISSION. THUNDERSTORMS WITH HEAVY RAIN WERE LOCATED IN NORTH CENTRAL SOUTH DAKOTA. THE STRONGEST THUNDERSTORMS WERE 20 TO 30 MILES SOUTH AND 45 MILES SOUTHKWEST OF ABERDEEN. ALL OF THESE STORMS WERE MOVING TO THE EAST AT 30 MILES. THESE THUNDERSTORMS MAY PRODUCE SMALL HAIL...HEAVY RAIN...STRONG WINDS AND DANGEROUS LIGHTNING. HUTCHEON
Special weather statement, Jul 24, 1:50 PM CDT, 36 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 145 PM CDT FRI JUL 24 1987 ..SEVERE THUNDERSTORM WATCH FOR SOUTH CENTRAL AND SOUTHEAST SOUTH DAKOTA... AT 135 PM CDT...THERE WERE SCATTERED INTENSE THUNDERSTORMS SOME WITH VERY HEAVY RAIN IN CENTRAL AND EASTERN SOUTH DAKOTA. THE THUNDERSTORMS WERE IN A 170 MILE WIDE AREA WHICH EXTENDED FROM ABERDEEN SOUTHWEST TO AND INTO NEBRASKA 70 MILES SOUTHWEST OF MITCHELL. THE HEAVIEST THUNDERSTORMS WERE IN CHARLES MIX AND BON HOMME COUNTIES 45 MILES AND 20 MILES WEST OF YANKTON. THE THUNDERSTORMS SOUTH OF ABERDEEN AND WEST OF HURON HAD SHOWN NO INCREASE IN INTENSITY. ALL OF THESE STORMS WERE MOVING TO THE EAST AT 30 MILES. THESE THUNDERSTORMS COULD PRODUCE HAIL...HEAVY RAIN...STRONG WINDS AND DANGEROUS LIGHTNING. REYNOLDS
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 7:08 PM CDT | Severe Thunderstorm Warning | FSD | Mellette, Todd | 67 min |
| Jul 23, 7:19 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Davison | 56 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 1987Every severe thunderstorm warning in 1987
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.