Alert archive / Minnesota / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 170, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 17, 1986, 1:50 AM CDT for Steele County, Minnesota. It was in force for 40 min.
The area
The counties it named.
The facts
- Issued
- Aug 17, 1986, 1:50 AM CDT (06:50 UTC)
- Expired
- Aug 17, 1986, 2:30 AM CDT
- In force
- 40 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
County Steele 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, 6.8 hours before the alert went out and 97 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
- 3000 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- -91 m²/s²
- 0-3 km storm-relative helicity
- 123 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 170650 SVRRST MNC131-147-049-039-170730- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ROCHESTER MN 150 AM CDT SUN AUG 17 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 230 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTHEAST MINNESOTA...EASTERN RICE...NORTHERN STEELE...GOODHUE AND NORTHERN DODGE THIS WOULD INCLUDE TOWNS OF FARIBAULT..RED WING AND OWATONNA. AT 135 AM CDT WEATHER RADAR INDICATED A STRONG LINE OF THUNDERSTORMS FROM CANNON FALLS SOUTH TO WATERVILLE. MOVEMENT WAS TO THE EAST AT 30 MPH. IF YOU ARE IN OR NEAR THE WARNED AREA GET TO A REINFORCED SHELTER AND PREPARE FOR STRONG DAMAGING WIND..LARGE HAIL..VERY HEAVY RAIN AND DANGEROUS LIGHTNING. REMEMBER THESE STORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE OR NO ADVANCE WARNING SO BE ON THE LOOKOUT. ANDERSON
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 16, 9:49 PM CDT, 4 hours 1 minute before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 940 PM CDT SAT AUG 16 1986 THE SEVERE THUNDERSTORMS OVER WESTCENTRAL WISCONSIN IN ST CROIX COUNTY HAVE WEAKENED CONSIDERABLY SINCE ABOUT 920PM. NO REPORTS OF SEVERE WEATHER HAVE BEEN RECEIEVED SINCE AROUND 9PM WHEN GOLFBALL HAIL FELL IN HOLTON OF EXTREME WESTERN ST CROIX COUNTY. OTHER THUNDERSTORMS REMAIN SCATTERED IN AN EAST TO WEST LINE FROM NEAR EAU CLAIR THROUGH WAUSAU. OTHER VERY STRONG THUNDERSTORMS WERE DEVELOPING AND MAKING FURTHER INROADS INTO WESTERN MINNESOTA AND CENTRAL MINNESOTA. THE AREA OF STRONGEST STORMS WAS SCATTERED IN AN AREA FROM JUST NORTH OF MARSHALL IN YELLOW MEDICINE COUNTY EAST TO AROUND GRANITE FALLS IN RENVELLE COUNTY AND THEN INTO THE COSMOS..HECTOR AREA OF MEEKER AND RENVILLE COUNTIES. THESE THUNDERSTORMS WILL MOVING INTO WRIGHT..MC LEOD AND SIBLEY COUNTIES AFTER 10PM. THESE STORMS WERE MOVING EAST TO }SOUTHEAST AT AROUND 20 MPH. IF THREATENING WEATHER APPROACHES YOUR SEEK SHELTER AND IF SAFTEY PERMITS RELAY SEVERE WEATHER REPORTS TO LOCAL LAW OFFICALS FOR RELAY TO THE NATIONAL WEATHER SERVICE. PAULSON
Special weather statement, Aug 16, 10:20 PM CDT, 3 hours 30 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 1015 PM CDT SAT AUG 16 1986 VERY STRONG THUNDERSTORMS CONTINUED TO DEVELOP AND CONTINUE TO MAKE PROGRESS ACROSS WESTERN AND INTO CENTRAL MINNESOTA. THE LEADING EDGE OF THESE THUNDERSTORMS WAS MOING INTO THE WESTERN TWIN CITY METRO AREA. MARBLE HAIL WAS REPORTED IN DELANO OF SOUTHEAST WRIGHT COUNTY ABOUT 10 PM. THIS THUNDERSTORM WAS MOVING INTO INTO THE INDEPENDENCE AREA OF WESTERN HENNEPIN COUNTY AT 1015PM AND TRACK TOWARD THE PLYMOUTH AREA OF HENNIPIN COUNTY AROUND 1030 PM IF IT MAINTAINS ITS STRENGTH. OTHER STRONG THUNDERSTORMS REMAINED SCATTERED ACROSS MEEKER..RENVILLE MC CLEOD..WRIGHT..AND KANDIYOHI COUNTIES. WHICH IS WEST OF THE TWIN CITIES. SOME OF CITIES AND TOWNS WHICH MAY BE NEAR THESE STRONGER STORMS ARE OLIVIA..WILLMAR..AND LITCHFIELD. THESE THUNDERSTORMS WERE MOVING EAST TO SOUTHEAST AT 20 MPH. IF THREATENING WEATHER APPROACHES YOUR SEEK SHELTER AND IF SAFTEY PERMITS RELAY SEVERE WEATHER REPORTS TO LOCAL LAW OFFICALS FOR RELAY TO THE NATIONAL WEATHER SERVICE. PAULSON
Local storm report, Aug 16, 10:45 PM CDT, 3 hours 5 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
1045 PM CDT SAT AUG 9 1986
ATTN SELS A MSP
723 PM CDT GOLF BALL SIZE HAIL NEAR CITY OF KNAPP OF DUNN COUNTY WI.
730 PM CDT 2 INCH HAIL IN BLOOMINGTON MN..S HENNEPIN COUNTY.
(OFF DUTY NWS EMPLOYEE)
740 PM TO 800 PM CDT...INTERMITENT GOLF BALL SIZE HAIL AT MSP
AIRPORT.
742 PM CDT 52 MPH WIND GUST AT MSP.
815 PM CDT GOLF BALL SIZE HAIL AT MAPLEWOOD MN OF RAMSEY COUNTY.
825 PM CDT GOLF BALL SIZE HAIL AT OAKDALE MN OF WASHINGTON COUNTY.
( REPORTED BY SKYWARN SPOTTER)
849 PM CDT 3/4 INCH HAIL AT HOULTON WI OF ST. CROIX COUNTY. REPORTED
BY SHERIFF DISPATCH.
RICHARDSONLocal storm report, Aug 16, 10:47 PM CDT, 3 hours 3 minutes before
STORM REPORT....CORRECTION FOR DATE
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
1045 PM CDT SAT AUG 16 1986
ATTN SELS A MSP
723 PM CDT GOLF BALL SIZE HAIL NEAR CITY OF KNAPP OF DUNN COUNTY WI.
730 PM CDT 2 INCH HAIL IN BLOOMINGTON MN..S HENNEPIN COUNTY.
(OFF DUTY NWS EMPLOYEE)
740 PM TO 800 PM CDT...INTERMITENT GOLF BALL SIZE HAIL AT MSP
AIRPORT.
742 PM CDT 52 MPH WIND GUST AT MSP.
815 PM CDT GOLF BALL SIZE HAIL AT MAPLEWOOD MN OF RAMSEY COUNTY.
825 PM CDT GOLF BALL SIZE HAIL AT OAKDALE MN OF WASHINGTON COUNTY.
( REPORTED BY SKYWARN SPOTTER)
849 PM CDT 3/4 INCH HAIL AT HOULTON WI OF ST. CROIX COUNTY. REPORTED
BY SHERIFF DISPATCH.
RICHARDSONSpecial weather statement, Aug 17, 12:46 AM CDT, 1 hour 4 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 1245 AM CDT SUN AUG 17 1986 AT 12.30 AM CDT...SHOWERS AND THUNDERSTORMS..SOME WITH HEAVY RAINS AND HAIL..AND OCCASIONAL WIND GUSTS TO NEAR 50 MILES AN HOUR..WERE OCCURRING OVER A LARGE PART OF THE SOUTH THIRD OF MINNESOTA..INTO WEST CENTRAL WISCONSIN..AND NORTHWEST IOWA. HEAVIEST THUNDERSTORMS WERE ALONG A 10 TO 15 MILE WIDE AREA FROM 30 MILES NORTHEAST OF ST PAUL NEAR ST CROIX FALLS..ACROSS THE TWIN CITIES.. TO NEAR MANKATO. THIS IS THE AREA MOST LIKELY TO HAVE THE HAIL AND TURBULENT WEATHER CONDITIONS. MOVEMENT WAS SOUTHEAST AT 15 TO 20 MILES AN HOUR. NESLEY RELAY TO THE NATIONAL WEATHER SERVICE. PAULSON
Local storm report, Aug 17, 1:08 AM CDT, 42 minutes before
STORM REPORT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 105 AM CDT SUN AUG 17 1986 ATTN SELS A MSP 1108 PM CDT POWER LINES DOWN IN CITY OF OLIVIA MN RENVILLE COUNTY. 1117 PM CDT 3/4 INCH HAIL IN CITY OF BIRD ISLAND MN..RENVILLE COUNTY. RICHARDSON
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 7:47 PM CDT | Severe Thunderstorm Warning | MPX | Dakota, Hennepin, Ramsey | 28 min |
| Aug 16, 7:47 PM CDT | Severe Thunderstorm Warning | MPX | Washington | 28 min |
| Aug 16, 8:22 PM CDT | Severe Thunderstorm Warning | MPX | Washington | 38 min |
| Aug 16, 10:57 PM CDT | Severe Thunderstorm Warning | MPX | Renville | 63 min |
| Aug 17, 1:07 AM CDT | Severe Thunderstorm Warning | MPX | Blue Earth, Le Sueur, Nicollet | 33 min |
| Aug 17, 1:50 AM CDT | Severe Thunderstorm Warning | MPX | Dodge, Goodhue, Rice | 40 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.