Alert archive / Minnesota / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 121, NWS Twin Cities, MN

July 19, 1986Fillmore County, Houston County, Winona County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 19, 1986, 5:43 AM CDT for Fillmore County, Houston County, Winona County, Minnesota. It was in force for 47 min.

The area

The counties it named.

The facts

Issued
Jul 19, 1986, 5:43 AM CDT (10:43 UTC)
Expired
Jul 19, 1986, 6:30 AM CDT
In force
47 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Fillmore County, MN, Houston County, MN, Winona 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, 10.7 hours before the alert went out and 187 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 1986-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 235 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 1986-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -12 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
235 J/kg
Mixed-layer CIN
-264 J/kg
Mixed-layer LCL
1882 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
-12 m²/s²
0-3 km storm-relative helicity
126 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KRST 191043
SVRRST
MNC045-169-055-191130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ROCHESTER MN
543 AM CDT SAT JUL 19 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 630 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

SOUTHEAST MINNESOTA...EASTERN FILLMORE...SOUTHERN WINONA AND HOUSTON

THIS WARNING INCLUDES THE CITIES OF RUSHFORD MINNESOTA AND
HOUSTON MINNESOTA

AT 525 AM CDT THIS SATURDAY JUL 19TH MORNING RADAR INDICATED A
SEVERE THUNDERSTORM 10 MILES WEST OF RUSHFORD MINNESOTA MOVING
TOWARDS THE EAST AR 40 MPH.

 A SEVERE THUNDERSTORM PRODUCES STRONG DAMAGING WINDS..LARGE HAIL
 ..VERY HEAVY qRAIN AND DANGEROUS LIGHTNING.

 REMEMBER THESE STORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO
 WITH LITTLE OR NOW ADVANCE WARNING SO BE ON THE LOOKOUT.

 BARNES

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 18, 11:56 PM CDT, 5 hours 47 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE MINNEAPOLIS ST PAUL MN
1145 PM CDT FRI JUL 18 1986

AT 1130 PM...THUNDERSTORMS...WITH HEAVY TO LOCALLY INTENSE RAINFALL..
CONTINUED TO DEVELOP ACROSS PARTS OF SOUTHWEST INTO CENTRAL MINNESOTA.
HAIL...STRONG GUSTY WINDS AND DANGEROUS LIGHTNING STRIKES ARE POSSIBLE
WITH THESE THUNDERSTORMS.

ONE BAND OF THESE THUNDERSTORMS EXTENDED FROM THE SOUTH DAKOTA BORDER...
NEAR CANBY...TO WILLMAR...TO JUST NORTHWEST OF ST CLOUD.

ANOTHER AREA REACHED FROM AROUND BRAINERD ACROSS MILLE LACS LAKE TO JUST
EAST OF THE LAKE.

IN WEST CENTRAL WISCONSIN...A THUNDERSTORM WITH VERY HEAVY RAINS WAS
NORTHEAST OF LA CROSSE...JUST EAST OF BLACK RIVER FALLS.

MOVEMENT WAS TO THE EAST AT 35 MILES AN HOUR.

OTHERWISE...MOSTLY GARDEN VARIETY SHOWERS AND THUNDERSTORMS WERE
SCATTERED ACROSS PARTS OF NORTH AND CENTRAL MINNESOTA...AND...NORTH TO
SOUTH ACROSS WEST WISCONSIN FROM NEAR ASHLAND' THRU EAU CLAIRE TO NEAR
LA CROSSE.
DOM
Special weather statement, Jul 19, 2:35 AM CDT, 3 hours 8 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS ST PAUL MN
230 PM CDT SAT JUL 19 1986

SEVERE THUNDERSTORM WATCH 395 HAS BEEN CANCELLED OVER PORTIONS OF
CENTRAL MINNESOTA.  THE COUNTIES CLEARED OF THIS WATCH INCLUDE PINE..
KANABEC..MILLE LACS..ISANTI..MORRISON..BENTON..STEARNS..SHERBURNE..
MEEKER..WRIGHT AND MCLEOD.
HARRISON
SCATTERED ACROSS PARTS OF NORTH AND CENTRAL MINNESOTA...AND...NORTH TO
SOUTH ACROSS WEST WISCONSIN FROM sNEAR ASHLAND THRU EAU CLAIRE TO NEAR
LA CROSSE.
DOM
Special weather statement, Jul 19, 3:34 AM CDT, 2 hours 9 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS ST PAUL MN
320 AM CDT SAT JUL 19 1986

SEVERE THUNDERSTORM WATCH 395 HAS BEEN CANCELLED OVER THE TWIN CITIES
METROPOLITAN AREA.  THE COUNTIES CLEARED FROM THIS SEVERE THUNDERSTORM
WATCH ARE HENNEPIN..RAMSEY..CARVER..DAKOTA..SCOTT..WASHINGTON..CHISAGO
AND SIBLEY.

AT 320 AM THIS MORNING A NUMEROUS THUNDERSTORMS CONTINUED TO MOVE
NORTHEAST ALONG A COLD FRONT FROM SOUTHEAST SOUTH DAKOTA TO ACROSS
SOUTHERN MINNESOTA.  THE SEVERE THUNDERSTORM WATCH CONTINUES TO BE
IN EFFECT UNTIL 600 AM FROM NEW ULM AND ST PETER IN SOUTH CENTRAL
MINNESOTA THROUGH MANKATO..FAIRBAULT..ROSCHESTER TO RED WING AND
WINONA ON THE MISSISSIPPI RIVER.

A LARGE PORTION OF WEST CENTRAL WISCONSIN ALSO REMAINS IN THE
SEVERE THUNDERSTORM WATCH THIS MORNING.
HARRISON
Local storm report, Jul 19, 4:00 AM CDT, 1 hour 43 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE ST CLOUD MN
325 AM CDT SAT JUL 19 1986

TIME        EVENT
19 JUL.  WSO ST. CLOUD RECORDED 1.60 INCHES OF RAIN IN 35
MINUTES..1220 AM CDT TO 1255 AM CDT.

FRASER
Special weather statement, Jul 19, 4:03 AM CDT, 1 hour 40 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
400 AM CDT SAT JUL 19 1986

AT 355 AM...THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUED TO MOVE EAST
AT 40 MILES AN HOUR THROUGH SOUTHERN MINNESOTA AND WESTERN WISCONSIN.
THESE STORMS HAVE DECREASED SOMEWHAT IN STRENGTH SINCE 300 AM...BUT
COULD STILL PRODUCE STRONG GUSTY WINDS OF 40 TO 50 MILES AN HOUR...
SMALL HAIL...AND DEADLY LIGHTNING.  THE VERY HEAVY RAINFALL PRODUCED
BY SOME OF THESE STORMS COULD POSSIBLY CAUSE SOME PONDING OF WATER IN
LOW LYING FIELDS AND UNDERPASSES.  THE STRONGEST THUNDERSTORMS WERE IN
A 40 MILE WIDE LINE FROM CORNELL IN WEST CENTRAL WISCONSIN...SOUTHWEST
TO LAKE CITY MINNESOTA...TO OWATONNA TO FAIRMONT TO SIOUX CITY IOWA.

PERSONS ENGAGED IN OUTDOOR ACTIVITIES SHOULD REMAIN ALERT TO CHANGING
WEATHER CONDITIONS AND BE PREPARED TO TAKE APPROPRIATE PROTECTIVE
ACTIONS IF THESE STRONG THUNDERSTORMS APPROACH.
KRAFT

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 7:06 PM CDTSevere Thunderstorm WarningMPXKandiyohi54 min
Jul 19, 12:42 AM CDTSevere Thunderstorm WarningMPXBenton, Mille Lacs, Sherburne48 min
Jul 19, 12:42 AM CDTSevere Thunderstorm WarningMPXIsanti48 min
Jul 19, 12:42 AM CDTSevere Thunderstorm WarningMPXMeeker, Wright48 min
Jul 19, 1:15 AM CDTSevere Thunderstorm WarningMPXCarver, Hennepin60 min
Jul 19, 1:15 AM CDTSevere Thunderstorm WarningMPXAnoka, Isanti60 min
Jul 19, 1:32 AM CDTSevere Thunderstorm WarningMPXWashington58 min
Jul 19, 1:32 AM CDTSevere Thunderstorm WarningMPXChisago58 min
Jul 19, 1:32 AM CDTSevere Thunderstorm WarningMPXRamsey58 min
Jul 19, 2:09 AM CDTSevere Thunderstorm WarningMPXBrown, Nicollet51 min
Jul 19, 2:51 AM CDTSevere Thunderstorm WarningMPXLe Sueur54 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.