Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 91, NWS Twin Cities, MN

July 5, 1986Chippewa County, Eau Claire County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 5, 1986, 8:38 PM CDT for Chippewa County, Eau Claire County, Wisconsin. It was in force for 52 min.

The area

The counties it named.

The facts

Issued
Jul 5, 1986, 8:38 PM CDT (01:38 UTC)
Expired
Jul 5, 1986, 9:30 PM CDT
In force
52 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Chippewa County, WI, Eau Claire County, WI

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, 1.6 hours before the alert went out and 183 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 1986-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 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 1986-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -60 square meters per square second.193958Sfc1 km3 km6 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1117 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
-60 m²/s²
0-3 km storm-relative helicity
47 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 060138
SVRMSP
WIC017-035-060230-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
838 PM CDT SAT JUL 5 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 930 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

WEST CENTRAL WISCONSIN...EASTERN CHIPPEWA AND WESTERN EAU CLAIRE

AT 830 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM SOUTHWEST OF
EAU CLAIRE WISCONSIN NEAR ROCK FALLS AND WAS MOVING NORTHEAST AT
40 MILES AN HOUR.

SOME CITIES IN THE PATH OF THIS SEVERE THUNDERSTORM ARE...EAU
CLAIRE IN EAU CLAIRE COUNTY AND BOYD IN EASTERN CHIPPEWA COUNTY.

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.

MNILLER

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 5, 3:15 PM CDT, 5 hours 23 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST CLOUD MN
345 PM CDT SAT JUL 5 1986.

...TORNADO WATCH 400 PM CDT TO 1000  PM CDT...
...STRONG THUNDERSTORMS IN CENTRAL MINNESOTA...

AT 345 PM CDT RADAR  SHOWED A RAPIDLY DEVELOPING LINE OF STRONG
THUNDERSTORMS IN CENTRAL MINNESOTA EXTENDING FROM BRAINERD TO WILMAR.

THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING LOCALLY HEAVY RAIN..HAIL
AND VERY GUSTY WINDS.

THE THUNDERSTORMS WERE MOVING EAST NORTHEAST AT 25 MPH.

ALTHOUGH NO SEVERE WEATHER HAS BEEN REPORTED YOU SHOULD BE PREPARED
TO GO TO A PLACE OF SAFETY IF THREATENING WEATHER APPROACHES.

YOUNG/FRASER
Special weather statement, Jul 5, 7:19 PM CDT, 1 hour 19 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEPOLIS/ST PAUL MN
700 PM CDT SAT JUL 5 1986

...A PORTION OF TORNADO WATCH NUMBER 337 CANCELLED FOR MINNESOTA...

THE STRONG COLDFRONT WHICH SPAWNED THE SEVERE THUNDERSTORMS IN
MINNESOTA THIS AFTERNOON AND EARLY EVENING HAS MOVED EAST TO NEAR A
FAIRMONT TO HIBBING LINE AT 7PM.  THUS..THE THREAT OF SEVERE
THUNDERSTORMS HAS ENDED FOR THAT PORTION OF MINNESOTA WEST OF
THIS FRONT.  SOME OF THE CITIES NO LONGER UNDER THE TORNADO
WATCH ARE BRAINERD..ST CLOUD..REDWOOD FALLS..WORTHINGTON..AND
BUFFALO.

THE TORNADO WATCH REMAINS IN EFFECT FOR MUCH OF MINNESOTA
EAST OF A LINE FROM HIBBING TO FAIRMONT UNTIL 10PM.  AS THE COLDFRONT
CONTINUES TO MOVE EAST ADDITIONAL PORTIONS OF THE WATCH MAY BE CLEARED.
PAULSON
Special weather statement, Jul 5, 8:13 PM CDT, 25 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEPOLIS/ST PAUL MN
805 PM CDT SAT JUL 5 1986

...TORNADO WATCH NUMBER 337 REMAINS IN EFFECT FOR ONLY A PORTION OF
SOUTHEAST MINNESOTA..

THE STRONG COLDFRONT WHICH SPAWNED THE SEVERE THUNDERSTORMS IN
MINNESOTA THIS AFTERNOON AND EARLY EVENING HAS MOVED EAST OF A DULUTH
TO MINNEAPOLIS..TO MANKATO LINE.  THUS..THE THREAT OF SEVERE
THUNDERSTORMS HAS ENDED FOR THAT PORTION OF MINNESOTA WEST OF
THIS FRONT.  THUS..DULUTH AND THE TWIN CITIES ARE NO LONGER UNDER THE
TORNADO WATCH.

THE TORNADO WATCH REMAINS IN EFFECT ONLY FOR THE REDWING..ALBERT LEA..
AUSTIN AREAS OF SOUTHEAST MINNESOTA.   SEVERE WEATHER MAY MOVE EAST
ACROSS THE REMAI4NDER OF SOUTHEAST MINNESOTA THIS EVENING.
PAULSON

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 5, 8:04 PM CDTSevere Thunderstorm WarningMPXBarron, Chippewa, Dunn56 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 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.