Alert archive / South Dakota / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 129, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 15, 1987, 8:12 PM CDT for Yankton County, South Dakota. It was in force for 63 min.
The area
The counties it named.
The facts
- Issued
- Aug 15, 1987, 8:12 PM CDT (01:12 UTC)
- Expired
- Aug 15, 1987, 9:15 PM CDT
- In force
- 63 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 00:00Z, 1.2 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
- 3633 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 207 m²/s²
- 0-3 km storm-relative helicity
- 316 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 160112
SVRFSD
SDC135-160215-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
812 PM CDT SAT AUG 15 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 915 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
IN SOUTHEAST SOUTH DAKOTA
...YANKTON
SOME CITIES INCLUDED IN THIS WARNING ARE YANKTON...LESTERVILLE...
MIDWAY STORES...AND MAYFIELD.
AT 812 PM CDT RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS OVER
EASTERN BON HOMME COUNTY FROM SCOTLAND TO SOUTH OF TABOR. 60 MPH
WINDS WERE REPORTED AT SCOTLAND BY STATE RADIO. THE SEVERE STORMS
WERE MOVING EAST AT 25 MPH.
THIS WARNING INCLUDES THE ADJACENT WATERS OF THE MISSOURI RIVER.
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.
KAPELAWhat 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, Aug 15, 6:03 PM CDT, 2 hours 9 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 555 PM CDT SAT AUG 15 1987 ...SEVERE THUNDERSTORM WARNING FOR CLARK COUNTY UNTIL 645 PM CDT... ...TORNADO WATCH FOR EASTERN SOUTH DAKOTA UNTIL 900 PM CDT... AT 525 PM CDT...A LINE OF INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUED OVER NORTHEASTERN SOUTH DAKOTA. THE INTENSE THUNDERSTORMS WERE LOCATED 20 MILES EITHER SIDE OF A LINE FROM WOLSEY...ABOUT 10 MILES WEST OF HURON TO 50 MILES NORTHEAST OF ABERDEEN AT VEBLEN. THESE STORMS HAVE PRODUCED TORNADOES...LARGE HAIL...VERY HEAVY RAIN AND DANGEROUS LIGHTNING. THE THUNDERSTORMS WERE MOVING TO THE EAST AT 35 MILES AN HOUR. ...OTHERWISE NUMEROUS INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUED IN SOUTH CENTRAL SOUTH DAKOTA. THE THUNDERSTORMS WERE LOCATED SOUTH OF A LINE FROM CHAMBERLAIN TO FORESTBURG...ABOUT 20 MILES SOUTH OF HURON AND EAST OF THE JAMES RIVER. THESE STORMS MAY PRODUCE VERY HEAVY RAIN...HAIL...STRONG GUSTY WIND...DANGEROUS LIGHTNING AND RAPID FLOODING OF LOW LYING AREAS. THESE THUNDERSTORMS ARE MOVING TO THE EAST AT 30 MILES AN HOUR. HUTCHEON
Local storm report, Aug 15, 6:11 PM CDT, 2 hours 1 minute before
STORM REPORT NATIONAL WEATHER SERVICE SIOUX FALLS SD 615 PM CDT SAT AUG 15 1987 STORM DATA FOR SATURDAY AUGUST 15 1987 TIME COUNTY..LOCATION CHARACTER OF STORM..DAMAGE ....................................................................... 607 PM CDT CHARLES MIX...WAGNER GOLF BALL SIE HAIL UMLAND
Local storm report, Aug 15, 6:28 PM CDT, 1 hour 44 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
625 PM CDT SAT AUG 15 1987
STORM DATA FOR SATURDAY AFTERNOON AND EVENING
TIME COUNTY..LOCATION CHARACTER OF STORM..DAMAGE
.......................................................................
400 PM CDT GREGORY...AT BURKE AND 3/4 INCH HAIL FELL
HERRICK
607 PM CDT CHARLES MIX...AROUND GOLF BALL TO HEN EGG SIZE
WAGNER HAIL FELL
KAPELASpecial weather statement, Aug 15, 6:48 PM CDT, 1 hour 24 minutes before
SEVERE WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 645 PM CDT SAT AUG 15 1987 ...SEVERE THUNDERSTORM WARNING FOR CODINGTON AND NORTHERN HAMLIN UNTIL 715 PM CDT... ...TORNADO WATCH FOR EASTERN SOUTH DAKOTA UNTIL 900 PM CDT... AT 625 PM CDT...A LINE OF INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUED OVER NORTHEASTERN SOUTH DAKOTA. THE INTENSE THUNDERSTORMS WERE LOCATED 20 MILES EITHER SIDE OF A LINE FROM BANCROFT...20 MILES EAST OF HURON TO ROSHOLT...60 MILES NORTH OF WATERTOWN. THESE STORMS HAVE PRODUCED TORNADOES...LARGE HAIL... VERY HEAVY RAIN AND DANGEROUS LIGHTNING. THE THUNDERSTORMS WERE MOVING TO THE EAST AT 35 MILES AN HOUR. ...OTHERWISE AN ISOLATED INTENSE THUNDERSTORM WITH VERY HEAVY RAIN WAS 10 MILES NORTH AVON...WHICH IS ABOUT 30 MILES WEST OF YANKTON. THESE STORMS HAVE PRODUCE VERY HEAVY RAIN...LARGE HAIL...STRONG WINDS AND DANGEROUS LIGHTNING. THESE THUNDERSTORMS ARE MOV:ING TO THE EAST AT 35 MILES AN HOUR. HUTCHEON
Local storm report, Aug 15, 7:18 PM CDT, 54 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
715 PM CDT SAT AUG 15 1987
STORM DATA FOR SATURDAY EVENING
TIME COUNTY..LOCATION CHARACTER OF STORM..DAMAGE
.......................................................................
607 TO 630 CHARLES MIX...AT WAGNER GOLF BALL TO BASEBALL SIZE
PM CDT HAIL...13/4 TO 3 INCH
GROUND COVERED WHITE
638 PM CDT BON HOMME...HIGHWAY 46 3/4 INCH HAIL...40 MPH WINDS
IN WESTERN PART OF CNTY AND HEAVY RAINS
708 PM CDT BON HOMME...IN AVON 3/4 INCH HAIL...30 MPH WINDS
j AND HEAVY RAINS
KAPELASpecial weather statement, Aug 15, 8:04 PM CDT, 8 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 805 PM CDT FRI AUG 14 1987 AT 800 PM CDTD THUNDERSTORMS COVERED THE AREA BETWEEN YANKTON AND PICKSTOWN. SOME OF THESE STORMS WERE SEVERE AND WERE PRODUCING LARGE HAIL...GUSTY WINDS TO AROUND 40 MPH...DEADLY LIGHTNING...AND HEAVY RAINS WHICH WERE REUSLTING IN PONDING OF WATER IN LOW LYING AREAS. THESE STORMS WERE MOVING EAST AT NO MORE THAN 20 MPH. ELSEWHERE...A LINE OF INTENSE THUNDERSTORMS EXTENDED FROM 40 MILES WEST OF SIOUX FALLS NEAR SALEM TO THE CLEAR LAKE AREA IN EASTCENTRAL SOUTH DAKOTA. THESE INTENSE STORMS WERE PRODUCING PEA TO MARBLE SIZE HAIL...WIND GUSTS TO 40 TO 50 MPH...AND HEAVY RAINS. THIS LINE WAS MOVING EAST AT 30 MPH. KAPELA
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 7:48 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Charles Mix | 57 min |
| Aug 15, 9:05 PM CDT | Severe Thunderstorm Warning | FSD | McCook, Minnehaha | 55 min |
| Aug 15, 9:22 PM CDT | Severe Thunderstorm Warning | FSD | Minnehaha, Moody | 68 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.