Alert archive / Minnesota / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 11, NWS Twin Cities, MN

April 25, 1986Renville County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 25, 1986, 4:34 PM CST for Renville County, Minnesota. It was in force for 21 min.

The area

The counties it named.

The facts

Issued: Apr 25, 1986, 4:34 PM CST (22:34 UTC)
Expired: Apr 25, 1986, 4:55 PM CST
In force: 21 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

County Renville 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, 10.6 hours before the alert went out and 107 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 683 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 164 m²/s²
0-3 km storm-relative helicity: 227 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KMSP 252234
SVRMSP
MNC129-252330-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
434 PM CST FRI APR 25 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 530 PM CST FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

CENTRAL MINNESOTA...RENVILLE

AT 430..RADAR INDICATED A SEVERE THUNDERSTORM JUST EAST OF
REDWOOD FALLS IN THE SOUTHWEST PART OF RENVILLE COUNTY OF
SOUTH CENTRAL MINNESOTA.

LARGE HAIL AND POSSIBLE STRONG DAMAGING WINDS CAN BE EXPECTED
WITH THIS THUNDERSTORM AS IT MOVES NORTHEAST AT 35 MILES AN
HOUR.
SOME CITIES IN THE PATH OF THIS SEVERE THUNDERSTORM ARE..
HECTOR AND BUFFALO LAKE.

REMEMBER SEVERE THUNDERSTORMS PRODUCE STRONG DAMAGING WINDS..LARGE
HAIL AND FREQUENT LIGHTNING STRIKES. ALSO SEVERE THUNDERSTORMS CAN
AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE OR NO ADVANCE
WARNING..SO BE ON THE LOOKOUT AND BE PREPARED TO MOVE TO A PLACE OF
SAFETY IF ONE IS SPOTTED.

BRANCH

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, Apr 25, 2:35 PM CST, 1 hour 59 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
230 PM CST FRI APR 25 1986

...LINE OF STRONG THUNDERSTORMS MOVING INTO THE SOUTHWEST TWIN CITIES
 METRO AREA...

A LINE OF STRONG THUNDERSTORMS EXTENDING FROM EAST OF WACONIA IN EAST
CARVER COUNTY SOUTH THROUGH CENTRAL SCOTT AND INTO EAST LE SUEUR
COUNTY IS MOVING TO THE NORTHEAST AT 40 TO 45 MPH.  THESE THUNDERSTORMS
DEVELOPED RAPIDLY BETWEEN 2 AND 230 PM AND WILL BE MOVING INTO HENNEPIN
EASTERN SCOTT AND THROUGH EASTERN LE SUEUR COUTIES OF EAST CENTRL
MINNESOTA BY 3PM.

MOVEMENT WILL LATER TAKE THESE STORMS THROUGH THE ENTIRE METRO AREA
BETWEEEN 3 PM AND 4 PM CST. THESE THUNDERSTORMS MAY PRODUCE GUSTY
WINDS.-.LIGHTNING AND LARGE HAIL.  FISHERPERSONS AND OTHERS ENGAGED
IN OUTDOOR ACTIVIEIES SHOULD TAKE NECESSARY PRECUTIONS.
WILLIS

Special weather statement, Apr 25, 2:56 PM CST, 1 hour 38 minutes before

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
245 PM CST FRI APR 25 1986

.. TORNADO WATCH FOR SOUTHWEST AND WEST CENTRAL MINNESOTA UNTIL 8 PM ..
    .. STRONG THUNDERSTORMS MOVING THROUGH METRO AREA ..

AT 230 PM CST...THUNDERSTORMS HAVE INCREASED IN STRENGTH AND COVERAGE
OVER EAST CENTRAL AND SOUTHEAST MINNESOTA. THE LINE OF GROWING THUNDER
STORMS STRETCHED FROM JUST SOUTHEAST OF ST CLOUD..THROUGH WESTERN
HENNEPIN..EASTERN SCOTT..WESTERN DAKOTA AND RICE COUNTIES.

BRIEF HEAVY DOWNPOURS..STRONG GUSTY WINDS..SMALL HAIL AND FREQUENT
LIGHTNING ARE POSSIBLE WITH THE PASSAGE OF THESE STORMS. SOME TOWNS
LIKELY TO BE AFFECTED ARE CHASKA..SHAKOPEE..ANOKA..MINNEAPOLIS AND
ST PAUL..ROSEMONT..FARMINGTON..HASTINGS..STILLWATER..AND THEN INTO
WESTERN WISCONSIN BETWEEN HUDSON AND EAU CLAIRE.

REPORTS FROM SCOTT COUNTY INDICATE SMALL HAIL AND HEAVY SOAKING RAINS.
OTHER SHOWERS WERE LOCATED BETWEEN THE ?TWIN CITIES AND DULUTH AND INTO
NORTHWEST WISCONSIN.

MOVEMENT WAS NORTHEAST AT 40 TO 50 MILES AN HOUR.

 R.J. KESSLER

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 25, 3:30 PM CST	Severe Thunderstorm Warning	MPX	Washington	30 min
Apr 25, 3:30 PM CST	Severe Thunderstorm Warning	MPX	Dakota	30 min
Apr 25, 3:55 PM CST	Severe Thunderstorm Warning	MPX	Pope, Swift	50 min
Apr 25, 4:30 PM CST	Severe Thunderstorm Warning	MPX	Kandiyohi	60 min
Apr 25, 4:40 PM CST	Severe Thunderstorm Warning	MPX	Houston, Winona	40 min
Apr 25, 4:45 PM CST	Severe Thunderstorm Warning	MPX	Stearns	60 min
Apr 25, 5:15 PM CST	Severe Thunderstorm Warning	MPX	Meeker	30 min
Apr 25, 5:15 PM CST	Severe Thunderstorm Warning	MPX	Todd	30 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1986 Every 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.