Alert archive / Minnesota / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 148, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 30, 1986, 2:31 AM CDT for Cottonwood County, Murray County, Minnesota. It was in force for 59 min.
The area
The counties it named.
The facts
- Issued
- Jul 30, 1986, 2:31 AM CDT (07:31 UTC)
- Expired
- Jul 30, 1986, 3:30 AM CDT
- In force
- 59 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Cottonwood County, MN, Murray County, MN
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
Minneapolis, MN (KSTC), launched 00:00Z, 7.5 hours before the alert went out and 175 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
- 1530 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 1238 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- 57 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSD 300731 SVRFSD MNC101-033-300830- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 231 AM CDT WED JUL 30 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 330 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTHWEST MINNESOTA...NORTHEAST MURRAY AND COTTONWOOD SOME OF THE CITIES INCLUDED IN THIS WARNING ARE CURRIE...WESTBROOK JEFFERS AND MOUNTAIN LAKE MINNESOTA. AT 125 AM CDT RADAR INDICATED A SEVERE THUNDERSTORM 50 MILES NORTHNORTHEAST OF WORTHINGTON NEAR WALNUT GROVE MINNESOTA MOVING SOUTHEAST AT 25 MPH. *** REPORTED INFORMATION *** GOLF BALL SIZE HAIL AND 40 TO 50 MPH WINDS WERE REPORTED NEAR MARSHALL AND MINNEOTA MINNESOTA WITH THIS THUNDERSTORM. 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..DE8ADLY 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.
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, 10:19 PM CDT, 4 hours 12 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
Special weather statement, Jul 30, 1:08 AM CDT, 1 hour 23 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 105 AM CDT WED JUL 30 1986 ...A TORNADO WATCH IS IN EFFECT FOR CENTRAL AND EASTERN SOUTH DAKOTA UNTIL 6 AM CDT... AT 1 AM CDT...THE SEVERE THUNDERSTORM THAT WAS OCCURRING OVER EAST CENTRAL SOUTH DAKOTA HAD MOVED INTO WESTERN MINNESOTA. HOWEVER...SCATTERED STRONG THUNDERSTORMS CONTINUED OVER CENTRAL AND NORTHEAST SOUTH DAKOTA. THESE STORMS COULD STRENGTHEN. ORGISH/SPRINGER
Special weather statement, Jul 30, 1:22 AM CDT, 1 hour 9 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 120 AM CDT WED JUL 30 1986 ...SEVERE THUNDERSTORM WARNING FOR NORTHERN LINCOLN AND NORTHERN LYON COUNTIES IN MINNESOTA UNTIL 145 AM CDT... ...TORNADO WATCH FOR PART OF EASTERN SOUTH DAKOTA UNTIL 6 AM CDT... AT 110 AM CDT RADAR INDICATED A SMALL CLUSTER OF SEVERE THUNDERSTORMS CENTERED 50 MILES NORTHEAST OF BROOKINGS BETWEEN MINNEOTA AND PORTER MINNESOTA MOVING SOUTHEAST AT 35 MPH. THIS THUNDERSTORM PRODUCED TORNADOES AND GOLF BALL SIZE HAIL OVER NORTHEAST SOUTH DAKOTA LATE TUESDAY EVENING. THIS THUNDERSTORM WILL LIKELY PRODUCE HAIL...CLOUD TO GROUND LIGHTNING AND VERY HEAVY RAIN AND MAY PRODUCE DAMAGING WINDS. PERSONS NEAR AND TO THE SOUTHEAST OF THIS THUNDERSTORM SHOULD BE PREPARED FOR THIS ADVERSE WEATHER AND SEEK SAFE SHELTER IF NECESSARY. BLOOM
Special weather statement, Jul 30, 1:49 AM CDT, 42 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 145 AM CDT WED JUL 30 1986 THUNDERSTORMS CENTERED OVER NORTHEAST NEBRASKA WERE CAUSING STRONG WINDS OVER SOUTHEAST SOUTH DAKOTA. WINDS UP TO 45 MPH WERE REPORTED NEAR ELK POINT AND VIBORG SINCE 1245 AM CDT THIS WEDNESDAY MORNING. THESE STRONG WINDS ARE EXPECTED TO CONTINUE UNTIL 3 AM CDT AND SPREAD INTO PARTS OF NORTHWEST IOWA AND TOWARD THE SIOUX FALLS AREA. PERSONS IN THESE AREAS SHOULD BE PREPARED FOR THIS ADVERSE WEATHER. BLOOM
Local storm report, Jul 30, 2:00 AM CDT, 31 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
155 AM CDT WED JUL 30 1986
TIME EVENT AND LOCATION
1230 TO 155 AM CDT 40 TO 50 MPH WINDS AT ELK POINT..JEFFERSON. .AND
VIBORG AREA IN SOUTHEAST SOUTH DAKOTA.
130 TO 140 AM CDT GOLFBALL SIZE HAIL/50 MPH WINDS AT MINNEOTA MN
IN LYON COUNTY
KAPELALocal storm report, Jul 30, 2:11 AM CDT, 20 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE HURON SD
200 AM CDT WED JUL 30 1986
STORM REPORT FOR JULY 29 1986
805 PM CDT....PEA SIZE HAIL NEAR WILLOW LAKE SD..OR 30 MILES SOUTHWEST
OF WATERTOWN.
808 PM CDT....1 INCH HAIL AT WILLOW LAKE SD..OR 30 MILES SOUTHWEST OF
WATERTOWN.
920 PM CDT....DIME SIZE HAIL NEAR BADGER SD..OR 35 MILES SOUTH SOUTH
WEST OF WATERTOWN.
1103 PM CDT...PEA TO MARBLE SIZE HAIL NEAR WALLACE SD..OR 20 MILES
NORTHWEST OF WATERTOWN.
1113 PM CDT...TORNADO ON THE GROUND AT LAKE KAMPESKA..OR 5 MILES WEST
OF WATERTOWN. REPORTED BY SPOTTERS THROUGH THE WATERTOWN
CIVIL DEFENSE DIRECTOR.
1140 PM CDT...GOLFBALL SIZE HAIL 5 MILES NORTH OF WATERTOWN. ALSO...
SEVERAL SPOTTER REPORTS OF FUNNELS AND TORNADOES.
SPRINGERThe 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 | Lincoln | 55 min |
| Jul 30, 12:39 AM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Lyon | 66 min |
| Jul 30, 1:28 AM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Lyon | 62 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; the sounding from the Mesonet's radiosonde archive.