Alert archive / Minnesota / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 146, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 30, 1986, 12:39 AM CDT for Lincoln County, Lyon County, Minnesota. It was in force for 66 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 30, 1986, 12:39 AM CDT (05:39 UTC)
- Expired
- Jul 30, 1986, 1:45 AM CDT
- In force
- 66 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Lincoln County, MN, Lyon County, MN
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 30, 1:30 AM CDT | Thunderstorm Wind 0 | Lyon, MN | |
| Jul 30, 1:53 AM CDT | Hail 2.5 | Lyon, MN |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Aberdeen, SD (KHON), launched 00:00Z, 5.7 hours before the alert went out and 193 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
- 3602 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 1336 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 103 m²/s²
- 0-3 km storm-relative helicity
- 243 m²/s²
- Significant tornado parameter
- 3.5
- Supercell composite
- 24.1
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, 6:52 PM CDT, 5 hours 47 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, 5 hours 15 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, 4 hours 59 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, 3 hours 59 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...DANGEROUS 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
Special weather statement, Jul 29, 10:05 PM CDT, 2 hours 34 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 1005 PM CDT TUE JUL 29 1986 ..TORNADO WATCH UNTIL 1 AM THIS MORNING FOR MOST OF SIOUXLAND ... AT 1000 PM CDT RADAR INDICATED AN AREA OF STRONG THUNDERSTORMS FROM 5 MILES SOUTH OF YANKTON SOUTH DAKOTA..55 MILES NORTHWEST OF SIOUX CITY TO 10 MILES SOUTHWEST OF BERESFORD SOUTH DAKOTA..40 MILES NORTHWEST OF SIOUX CITY. THIS AREA OF STRONG THUNDERSTORMS WILL LIKELY PRODUCE HEAVY RAIN STRONG GUSTY WINDS AND HAIL AS IT MOVES THROUGH THE TOWNS OF BERESFORD AND ALCESTER SOUTH DAKOTA BETWEEN 1030 AND 1100 PM. THESES STORMS ARE MOVING EAST AT 25 MILES AN HOUR. PERSONS IN THE PATH OF THESE STORMS SHOULD BE ON THE LOOKOUT FOR THREATING WEATHER AND BE PREPARED TO TAKE COVER. TANNER
Special weather statement, Jul 29, 10:19 PM CDT, 2 hours 20 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 1018 PM CDT TUE JUL 29 1986 ...TORNADO WATCH FOR MUCH OF EASTERN SOUTH DAKOTA UNTIL 1 AM CDT... .CANCEL SEVERE THUNDERSTORM WARNING FOR ALL OF YANKTON...NORTHWEST CLAY AND EXTREME SOUTHERN TURNER COUNTIES IN SOUTHEAST SOUTH DAKOTA. THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL AND SOUTHEAST BROOKINGS COUNTY IN SOUTH DAKOTA AND FOR SOUTHERN LINCOLN COUNTY IN MINNESOTA HAS EXPIRED AND WILL NOT BE RENEWED. THE SEVERE THUNDERSTORM WARNING FOR ALL OF YANKTON...NORTHWEST CLAY AND EXTREME SOUTHERN TURNER COUNTIES IN SOUTHEST SOUTH DAKOTA HAS BEEN CANCELED. THE THUNDERSTORMS IN THESE AREAS HAVE DECREASED SOME SINCE 930 PM THIS EVENING. AT 1005 PM CDT RADAR INDICATED A LINE OF THUNDERSTORMS FROM 60 MILES NORTHEAST OF SIOUX FALLS NEAR LAKE WILSON MINNESOTA TO 25 MILES NORTHEAST OF BROOKINGS SOUTH DAKOTA NEAR ASTORIA SOUTH DAKOTA MOVING EAST SOUTHEAST AT 35 MPH. RADAR ALSO SHOWED THUNDERSTORMS 40 MILES SOUTHSOUTHWEST OF SIOUX FALLS NEAR CENTERVILLE AND WAKONDA SOUTH DAKOTA MOVING EAST AT 30 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
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 |
| Jul 29, 9:31 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Turner, Yankton | 59 min |
| Jul 30, 1:28 AM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Lyon | 62 min |
| Jul 30, 2:31 AM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Murray | 59 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.