Alert archive / South Dakota / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 183, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 31, 1986, 10:38 PM CDT for Tripp County, South Dakota. It was in force for 67 min.
The area
The counties it named.
The facts
- Issued
- Aug 31, 1986, 10:38 PM CDT (03:38 UTC)
- Expired
- Aug 31, 1986, 11:45 PM CDT
- In force
- 67 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Tripp 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
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 3.6 hours before the alert went out and 253 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
- 24 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 1064 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -33 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSD 010338 SVRFSD SDC123-010445- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 1038 PM CDT SUN AUG 31 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1145 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTH CENTRAL SOUTH DAKOTA...NORTHERN TRIPP SOME OF THE CITIES INCLUDED IN THIS WARNING ARE WINNER..WITTEN.. IDEAL..AND HAMILL. AT 1035 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES EAST OF WINNER AND 12 MILES NORTH OF WINNER. THESE SEVERE THUNDERSTORMS WERE MOVING NORTHEAST AT 20 MPH. AT 1020 PM CDT WITTEN RECEIVED GOLF BALL SIZE HAIL. IF YOU ARE IN THE PATH OF THIS STORM..YOU SHOULD GET TO A REINFORCED SHELTER. A SEVERE THUNDERSTORM PRODUCES DAMAGING 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. THESE STORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE OR NO ADVANCE WARNING SO BE ON THE LOOKOUT. WEILAND
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, Aug 31, 6:02 PM CDT, 4 hours 36 minutes before
SPECIAL WEATHER STATEMENT...COR TIME ONLY NATIONAL WEATHER SERVICE HURON SD 558 PM CDT SUN AUG 31 1986 AT 555 PM INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN WERE LOCATED OVER PARTS OF EASTERN SOUTH DAKOTA. RADAR INDICATED THE THUNDERSTORMS WERE LOCATED FROM NEAR GREGORY.. IN GREGORY COUNTY NORTHEAST TO NEAR SOUTHWEST DAY COUNTY. MOVMENT WAS NORTHEAST AT 25 MILES AN HOUR. RESIDENTS SHOULD BE ON THE ALERT FOR HEAVY RAINS..STRONG GUSTY WINDS ..FREQUENT LIGHTNING STRIKES AND POSSIBLE SMALL STREAM AND URBAN FLOODING. MILLER
Special weather statement, Aug 31, 6:09 PM CDT, 4 hours 29 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 605 PM CDT SUN AUG 31 1986 AT 605 PM CDT A LINE OF THUNDERSTORMS...SOME INTENSE...EXTENDED FROM 30 MILES EAST OF WINNER NEAR GREGORY TO THE HURON AREA. ANOTHER CLUSTER OF INTENSE THUNDERSTORMS WERE LOCATED 25 MILES SOUTHEAST OF ABERDEEN IN THE CONDE/CRANDALL/BUTLER AREA. THE INTENSE THUNDERSTORMS WERE PRODUCING STRONG GUSTY WINDS TO AROUND 45 MPH..SMALL HAIL..AND HEAVY RAINS. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 25 MPH AND WERE PASSING OVER LOCATIONS THAT WERE HIT EARLIER WITH OTHER THUNDERSTORMS. CONSEQUENTLY...FLOODING OF SMALL STREAMS AND LOW LYING AREAS WILL BE POSSIBLE THIS SUNDAY EVENING. BOATERS ON THE MISSOURI RIVER LAKES BETWEEN PICKSTOWN AND CHAMBERLAIN SHOULD STAY NEAR OR AT PORT DUE TO THE INTENSE THUNDERSTORMS. KAPELA
Special weather statement, Aug 31, 7:58 PM CDT, 2 hours 40 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 755 PM CDT SUN AUG 31 1986 ...INTENSE THUNDERSTORMS OVER EASTERN SOUTH DAKOTA... INTENSE THUNDERSTORMS WERE OCCURING OVER A PORTION OF EASTERN SOUTH DAKOTA THIS SUNDAY EVENING. AT 750 PM CDT THE INTENSE THUNDERSTORMS WERE SCATTERED IN A LINE FROM 30 MILES NORTH OF WATERTOWN TO 5 MILES WEST OF CHAMBERLAIN. THE MOST INTENSE THUNDERSTORMS WERE LOCATED 25 MILES NORTH OF WATERTOWN..NEAR SUMMIT..25 MILES WEST OF WATERTOWN.. NEAR CLARK AND 5 MILES WEST OF CHAMBERLAIN. THE INDIVIDUAL THUNDERSTORMS WERE MOVING NORTHEAST AT 25 MPH..WITH THE ENTIRE LINE NEARLY STATIONARY. THESE INTENSE THUNDERSTORMS WILL PRODUCE VERY HEAVY RAIN..STRONG WINDS TO 45 MPH..SMALL HAIL AND DANGEROUS LIGHTNING. THE INTENSE THUNDERSTORMS ALSO CONTINUE TO MOVE OVER THE SAME GENERAL AREA AND URBAN AND SMALL STREAM FLOODING IS A POSSIBILITY FROM NORTH OF WATERTOWN TO JUST WEST OF CHAMBE?RLAIN. WEILAND
Special weather statement, Aug 31, 8:55 PM CDT, 1 hour 43 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 850 PM CDT SUN AUG 31 1986 ...INTENSE THUNDERSTORMS CONTINUE FROM SOUTH CENTRAL TO NORTHEAST SOUTH DAKOTA... AT 845 PM CDT THUNDERSTORMS WERE IN A 50 MILE WIDE AREA FROM 40 MILES NORTHEAST OF WATERTOWN TO 15 MILES WEST OF CHAMBERLAIN. A FEW OF THE THUNDERSTORMS WITHIN THIS AREA WERE INTENSE AND WERE LOCATED 35 MILES NORTHEAST OF WATERTOWN..AND 10 MILES NORTHWEST OF CHAMBERLAIN. THE INTENSE THUNDERSTORMS WILL PRODUCE VERY HEAVY RAIN..GUSTY WINDS TO 45 MPH..SMALL HAIL AND DANGEROUS LIGHTNING. THE INDIVIDUAL THUNDERSTORMS WERE MOVING NORTHEAST AT 20 MPH..WITH THE ENTIRE AREA REMAINING NEARLY STATIONARY. THE THREAT OF URBAN AND SMALL STREAM FLOODING EXISTS FROM SOUTH CENTRAL TO NORTHEAST SOUTH DAKOTA AS THE THUNDERSTORMS CONTINUE TO MOVE OVER THAT AREA. THE THUNDERSTORMS HAVE SHOWN A TENDANCY SINCE 750 PM CDT TO DEVELOP FURTHER WEST NEAR THE CHAMBERLAIN AREA AT A SLOW SPEED. THIS TREND SHOULD CONTINUE..WITH THE THUNDERSTORMS MOVING NORTHEAST OVER THE ALREADY WET AREA. IN GENERAL..THE THUNDERSTORMS HAVE SHOWN A SLIGHT DECREASE IN INTENSITY SINCE 750 PM CDT. NO REPORTS OF SEVERE WEATHER HAVE BEEN RECEIVED BETWEEN 750 AND 850 PM CDT. WEILAND
Special weather statement, Aug 31, 9:55 PM CDT, 43 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 950 PM CDT SUN AUG 31 1986 ...FLOODING NO LONGER A PROBLEM TONIGHT OVER EASTERN SOUTH DAKOTA... THUNDERSTORMS CONTINUE FROM CENTRAL SOUTH DAKOTA TO NORTHEAST SOUTH DAKOTA LATE THIS SUNDAY EVENING..BUT HAVE DECREASED IN AREAL COVERAGE AND INTENSITY SINCE 850 PM CDT. BECAUSE OF THE LIGHTER RAINFALL AND SCATTERED NATURE OF THE STORMS..THE THREAT OF FLOODING NO LONGER EXISTS FOR SOUTH CENTRAL INTO NORTHEAST SOUTH DAKOTA TONIGHT. HOWEVER.. PREVIOUS SCATTERED HEAVY RAINFALL FROM CHAMBERLAIN TO THE SISSETON AREA COULD HAVE PRODUCED SOME LOCAL FLOODING. NO REPORTS OF FLOODING WERE RECEIVED THIS EVENING BY THE NATIONAL WEATHER SERVICE. AT 950 PM CDT THE MOST INTENSE THUNDERSTORMS WERE LOCATED 30 MILES NORTH OF WATERTOWN AND 40 MILES NORTHWEST OF HURON. THE THUNDERSTORMS WILL PRODUCE BRIEF HEAVY RAIN..GUSTY WINDS AND DANGEROUS LIGHTNING. THE INDIVIDUAL THUNDERSTORMS WERE MOVING NORTHEAST AT 20 MPH..WITH THE ENTIRE AREA MOVING NORTHWEST AT 10 MPH. THE THUNDERSTORMS HAVE CONTINUED TO DECREASE IN INTENSITY SINCE 850 PM CDT AND NO REPORTS OF SEVERE WEATHER HAVE BEEN RECEIVED BETWEEN 850 AND 945 PM CDT. WEILAND
Special weather statement, Aug 31, 10:32 PM CDT, 6 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 1030 PM CDT SUN AUG 31 1986 ...THUNDERSTORMS DEVELOP IN SOUTH CENTRAL SOUTH DAKOTA... INTENSE THUNDERSTORMS HAVE DEVELOPED SINCE 950 PM CDT OVER THE SOUTH CENTRAL PORTION OF SOUTH DAKOTA. AT 1015 PM CDT..WINNER RECEIVED SMALL HAIL..BRIEF VERY HEAVY RAIN AND WIND GUSTS TO 25 MPH. THE INTENSE THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT 20 MPH AND WILL CONTINUE TO PRODUCE VERY HEAVY RAIN..SMALL HAIL.. GUSTY WINDS TO 45 MPH AND DANGEROUS LIGHTNING. OTHER THUNDERSTORMS CONTINUE TO MOVE AND DEVELOP NORTHEAST INTO SOUTH CENTRAL SOUTH DAKOTA FROM NEBRASKA. THIS PATTERN SHOULD CONTINUE FOR THE REST OF TONIGHT. PERSONS IN SOUTH CENTRAL SOUTH DAKOTA SHOULD BE AWARE OF THE POSSIBILITY OF THUNDERSTORMS AND TAKE APPROPRIATE ACTION. WEILAND
Nearby
Severe Thunderstorm Warnings in South Dakota, 1986Every severe thunderstorm warning in 1986
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.