Alert archive / Minnesota / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 139, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 27, 1986, 6:56 PM CDT for Fillmore County, Mower County, Minnesota. It was in force for 34 min.
The area
The counties it named.
The facts
- Issued
- Jul 27, 1986, 6:56 PM CDT (23:56 UTC)
- Expired
- Jul 27, 1986, 7:30 PM CDT
- In force
- 34 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
Counties Fillmore County, MN, Mower 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 12:00Z, 11.9 hours before the alert went out and 161 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
- 1192 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 230 m²/s²
- 0-3 km storm-relative helicity
- 249 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 KRST 272356 SVRRST MNC099-045-280030- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ROCHESTER MN 656 PM CDT SUN JUL 27 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 730 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTHEAST MINNESOTA...EASTERN MOWER AND WESTERN FILLMORE THIS WARNING INCLUDES THE TOWNS OF GRAND MEADOW..LEROY.. SPRING VALLEY AND PRESTON. AT 640 PM RADAR INDICATED A SEVERE THUNDERSTORM NEAR GRAND MEADOW AND WYKOFF MINNESOTA. AT 640 PM VERY HEAVY DOWNPOURS OF RAIN AND HAIL WAS REPORTED NEAR WYKOFF AND IN EASTERN MOWER COUNTY. A SEVERE THUNDERSTORM PRODUCES STRONG DAMAGING WINDS.X.LARGE HAIL ..VERY HEAVY RAIN AND DANGEROUS LIGHTNING. REMEMBER THESE STORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE OR NOW ADVANCE WARNING SO BE ON THE LOOKOUT. AMANN
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 27, 4:59 PM CDT, 1 hour 57 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 455 PM CDT SUN JUL 27 1986 VERY STRONG THUNDERSTORMS WERE POUNDING THROUGH SOUTHEAST MINNESOTA WEST AND WEST CENTRAL WISCONSIN..SINCE 400 PM. AT 440 PM CDT..THESE INTENSE THUNDERSTORMS WERE LOCATED IN TWO SEPERATE LINES..EACH..ABOUT 25 MILES WIDE. ONE LINE EXTENDED FROM MENOMONEE SOUTHEAST THROUGH ELLSWORTH WISONSIN TO THE MISSISSIPPI RIVER JUST NORTH OF..RED WING MINNESOTA. THE OTHER LINE STRECHED FROM JUST NORTH OF WABASHA SOUTHEAST TO JUST NOARTH OF ROCHESTER NEAR DODGE CENTER. OTHER SCATTERED THUNDERSTORMS WERE DETECTED BETWEEN ROCHESTER AND AUSTIN DOWN INTO NORTH CENTRAL IOWA. MOVEMENT WAS TO THE EAST NORTHEAST AT 20 MILES AN HOUR. CARLYON
Special weather statement, Jul 27, 5:52 PM CDT, 1 hour 4 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 555 PM CDT SUN JUL 27 1986 VERY STRONG THUNDERSTORMS CONTIONUED POUNDING SOUTHEAST MINNESOTA..WEST AND WEST CENTRAL WISCONSIN..LATE THIS AFTERNOON. AT 530 PM CDT..THESE INTENSE THUNDERSTORMS WERE CONFINED TO ONE LARGE AREA EXTENDING FROM..MOWER AND FILLMORE COUNTIES 10 MILES SOUTH OF ROCHESTER NEAR..STEUARTVILLE NORTHEAST THROUGH WABASHA AND WINNONA INTO WISCONSIN THROUGH ALMA..WHITEHALL..AND PEPIN UP TO THE CHIPPEWA FALLS EAU CLAIRE AREAS. BY FAR THE MOST INTENSE..IMPRESSIVE AND DANGERSOUS THUNDERSTORM WAS JUST SOUTH OF THE ROCHESTER AIRPORT IN THE STEUARTVILLE AREA MOVING SLOWLY EAST AT 10 MPH..THIS PARTICULAR STORM IS VERY VERY DANGEROUS AND ANYONE NEAR THE STEUARTVILLE AREA OF SOUTHEAST MINNESOTA IS URGED TO SEEK PROTECTIVE SHELTER. MOVEMENT OF OTHER SHOWERS WAS TO THE NORTHEAST AT 20 MILES AN HOUR. CARLYON
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 7:13 PM CDT | Severe Thunderstorm Warning | MPX | Renville | 47 min |
| Jul 26, 7:47 PM CDT | Tornado Warning | MPX | Renville | 43 min |
| Jul 26, 8:36 PM CDT | Tornado Warning | MPX | Redwood, Renville | 24 min |
| Jul 26, 9:10 PM CDT | Severe Thunderstorm Warning | MPX | Redwood, Renville | 50 min |
| Jul 26, 9:35 PM CDT | Severe Thunderstorm Warning | MPX | Yellow Medicine | 55 min |
| Jul 26, 10:06 PM CDT | Severe Thunderstorm Warning | MPX | Redwood, Renville | 54 min |
| Jul 26, 10:30 PM CDT | Severe Thunderstorm Warning | MPX | Yellow Medicine | 60 min |
| Jul 26, 11:15 PM CDT | Severe Thunderstorm Warning | MPX | Pope | 60 min |
| Jul 26, 11:23 PM CDT | Severe Thunderstorm Warning | MPX | Redwood, Renville | 59 min |
| Jul 27, 3:47 PM CDT | Severe Thunderstorm Warning | MPX | Dakota | 38 min |
| Jul 27, 5:26 PM CDT | Severe Thunderstorm Warning | MPX | Fillmore, Olmsted | 49 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.