Alert archive / South Dakota / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 145, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 29, 1986, 9:31 PM CDT for Clay County, Turner County, Yankton County, South Dakota. It was in force for 59 min.
The area
The counties it named.
The facts
- Issued
- Jul 29, 1986, 9:31 PM CDT (02:31 UTC)
- Expired
- Jul 29, 1986, 10:30 PM CDT
- In force
- 59 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Clay County, SD, Turner County, SD, 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, 2.5 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
- 41 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 155 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 300231 SVRFSD SDC027-125-135-300330- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 931 PM CDT TUE JUL 29 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1030 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTHEAST SOUTH DAKOTA...NORTHWEST CLAY...EXTREME SOUTHERN TURNER AND YANKTON THIS WARNING INCLUDES THE ADJACENT WATERS OF THE MISSOURI RIVER. SOME OF THE CITIES INCLUDED IN WARNING ARE LESTERVILLE...VOLIN... VIBORG AND WAKONDA SOUTH DAKOTA. AT 920 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 15 MILES NORTHWEST OF YANKTON MOVING EAST AT 35 MPH. 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. BLOOM
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, Jul 29, 6:42 PM CDT, 2 hours 49 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 635 PM CDT TUE JUL 29 1986 ...A TORNADO WATCH IS IN EFFECT FOR MUCH OF CENTRAL AND EASTERN SOUTH DAKOTA UNTIL 1 AM CDT... AT 630 PM CDT...AN INTENSE THUNDERSTORM WAS OCCURRING OVER SOUTH EAST SOUTH DAKOTA 30 MILES EAST OF MITCHELL. THIS STORM WAS MOVING NORTHEAST AT 35 MILES AN HOUR. VERY HEAVY RAIN...HAIL...AND STRONG WIND IS LIKELY WITH THIS STORM. OTHERWISE...SCATTERED THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUED OVER SOUTHEAST SOUTH DAKOTA AND NORTHEAST NEBRASKA. IN SOUTH DAKOTA...THE THUNDERSTORMS WERE ALONG AND 30 MILES EITHER SIDE OF THE JAMES RIVER FROM MITCHELL TO YANKTON. IN NEBRASKA...THEY WERE NORTH AND EAST OF A LINE FROM ONEILL TO DECATUR...WHICH IS 40 MILES SOUTH OF SIOUX CITY. MOVEMENT WAS EAST AT 30 MILES AN HOUR. SPRINGER
Special weather statement, Jul 29, 6:47 PM CDT, 2 hours 44 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 647 PM CDT TUE JUL 29 1986 ..SEVERE THUNDERSTORM WARNING FOR MCCOOK...HANSON...EASTERN CHARLES-MIX ...SOUTHEAST DOUGLAS...HUTCHINSON...BON-HOMME...WESTERN YANKTON COUNTIES IN SOUTHEAST SOUTH DAKOTA UNTIL 715 PM CDT... AT 635 PM CDT RADAR SHOWED A LINE OF INTENSE THUNDERSTORMS FROM 40 MILES WESTNORTHWEST OF SIOUX FALLS NEAR SOUTH DAKOTA TO 25 MILES WEST OF YANKTON NEAR SPRINGFIELD SOUTH DAKOTA MOVING EAST NORTHEAST AT 25 MPH. THESE THUNDERSTORMS MAY PRODUCE LARGE HAIL...DAMAGING WINDS... DANGEROUS CLOUD TO GROUND LIGHTNING AND VERY HEAVY RAIN. PERSONS NEAR AND TO THE EASTNORTHEAST OF THESE THUNDERSTORMS SHOULD BE PREPARED FOR THIS ADVERSE WEATHER AND MOVE TO A SAFE PLACE IF NECESSARY. BLOOM
Special weather statement, Jul 29, 6:52 PM CDT, 2 hours 39 minutes before
SPECIAL WEATHER STATEMENT...CORRECTED... NATIONAL WEATHER SERVICE SIOUX FALLS SD 647 PM CDT TUE JUL 29 1986 .SEVERE THUNDERSTORM WARNING FOR MCCOOK...HANSON COUNTIES TIL 715 PM CDT. ...SEVERE THUNDERSTORM WARNING EASTERN CHARLES-MIX...SOUTHEAST DOUGLAS ...HUTCHINSON...BON-HOMME...WESTERN YANKTON COUNTIES UNTIL 700 PM CDT... AT 635 PM CDT RADAR SHOWED A LINE OF INTENSE THUNDERSTORMS FROM 40 MILES WESTNORTHWEST OF SIOUX FALLS NEAR SOUTH DAKOTA TO 25 MILES WEST OF YANKTON NEAR SPRINGFIELD SOUTH DAKOTA MOVING EAST NORTHEAST AT 25 MPH. THESE THUNDERSTORMS MAY PRODUCE LARGE HAIL...DAMAGING WINDS... DANGEROUS CLOUD TO GROUND LIGHTNING AND VERY HEAVY RAIN. PERSONS NEAR AND TO THE EASTNORTHEAST OF THESE THUNDERSTORMS SHOULD BE PREPARED FOR THIS ADVERSE WEATHER AND MOVE TO A SAFE PLACE IF NECESSARY. BLOOM
Special weather statement, Jul 29, 7:24 PM CDT, 2 hours 7 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 725 PM CDT TUE JUL 29 1986 ...TORNADO WATCH FOR MOST OF EASTERN SOUTH DAKOTA UNTIL 1 AM CDT... THE SEVERE THUNDERSTORM WARNING FOR SEVERAL COUNTIES IN SOUTHEAST SOUTH DAKOTA HAVE EXPIRED AND WILL NOT BE RENEWED. AT 713 PM CDT RADAR SHOWED A SINGLE THUNDERSTORM 15 MILES NORTHWEST OF SIOUX FALLS MOVING NORTHEAST AT 25 MPH AND WEAKENING RAPIDLY. RADAR ALSO SHOWED A LINE OF THUNDERSTORMS 30 MILES WEST NORTHWEST OF YANKTON NEAR TYNDALL SOUTH DAKOTA TO 30 MILES NORTHNORTHWEST OF SIOUX CITY NEAR MERRILL IOWA MOVING EAST AT 25 MPH. THESE THUNDERSTORMS MAY PRODUCE HAIL...STRONG WINDS...DANGEROUS CLOUD TO GROUND LIGHTNING AND VERY HEAVY RAIN. PERSONS NEAR THESE THUNDERSTORMS SHOULD BE PREPARED FOR THIS ADVERSE WEATHER AND MOVE TO A SAFE PLACE IF NECESSARY. BLOOM
Special weather statement, Jul 29, 7:40 PM CDT, 1 hour 51 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 739 PM CDT TUE JUL 29 1986 ...A TORNADO WATCH IS IN EFFECT FOR MUCH OF CENTRAL AND EASTERN SOUTH DAKOTA UNTIL 1 AM CDT... AT 730 PM CDT...THUNDERSTORMS WITH VERY HEAVY RAIN WERE IN EXTREME SOUTHEASTERN SOUTH DAKOTA. THESE EXTENDED INTO NORTHEASTERN NEBRASKA. IN SOUTH DAKOTA..THE STRONGEST THUNDERSTORM WAS JUST NORTH OF YANKTON. HAIL..STRONG WINDS..FREQUENT LIGHTNING..AND VERY HEAVY RAINS ARE LIKELY WITH THESE STORMS. OTHERWISE...SCATTERED THUNDERSTORMS WERE IN NORTHWESTERN SOUTH DAKOTA. THESE WERE FROM 15 MILES WEST OF LEMMON..TO 30 MILES SOUTH OF LEMMON. ALL MOVEMENT WAS EAST AT 35 MILES AN HOUR. KRAUSE/SPRINGER
Special weather statement, Jul 29, 8:40 PM CDT, 51 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 840 PM CDT JUL 29 1986 ...TORNADO WATCH FOR A LARGE PART OF EASTERN SOUTH DAKOTA UNTIL 1 AM CDT... ...INTENSE THUNDERSTORMS NEAR BROOKINGS SOUTH DAKOTA... AT 833 PM CDT RADAR SHOWED A LINE OF INTENSE THUNDERSTORMS FROM 10 MILES SOUTHSOUTHWEST OF BROOKINGS TO 20 MILES NORTHWEST OF BROOKINGS MOVING EAST AT 30 MPH. THESE THUNDERSTORMS MAY PRODUCE HAIL...STRONG WINDS...DANG EROUS CLOUD TO GROUND LIGHTNING AND VERY HEAVY RAIN. PERSONS NEAR AND TO THE EAST OF THESE THUNDERSTORMS SHOULD BE PREPARED FOR THIS ADVERSE WEATHER AND MOVE TO A SAFE PLACE IF NECESSARY. BLOOM
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 9:05 PM CDT | Severe Thunderstorm Warning | FSD | Brookings | 55 min |
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.