Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 40, NWS Twin Cities, MN

June 11, 1986Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 11, 1986, 3:25 PM CDT for Saint Croix County, Wisconsin. It was in force for 35 min.

The area

The counties it named.

The facts

Issued
Jun 11, 1986, 3:25 PM CDT (20:25 UTC)
Expired
Jun 11, 1986, 4:00 PM CDT
In force
35 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Saint Croix 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 12:00Z, 8.4 hours before the alert went out and 93 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 12:00Z on 1986-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 1986-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -98 square meters per square second.1939Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
574 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-98 m²/s²
0-3 km storm-relative helicity
-48 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 KMSN 112027
SVRMSN
WIC137-109-202100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING..CORRECTION FOR REMOVAL OF ST CROIX
NATIONAL WEATHER SERVICE MADISON WI
325 PM CDT WED JUN 11 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 400 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES OF

NORTHWEST WISCONSIN...NORTHWEST WAUSHARA

AT 305 PM CDT PUBLIC REPORTED GOLF BALL SIZE HAIL AT BIG FLATTS
IN NORTHERN ADAMS COUNTY OR ABOUT 75 MILES NORTH-NORTHWEST OF
MADISON.  THE THUNDERSTORM THAT CONTAINED THE HAIL MOVED TO THE
NORTHEAST.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...LARGE HAIL...AND
DEADLY LIGHTNING. TORNADOES CAN ALSO DEVELOP FROM SEVERE
THUNNDERSTORMS. IF THREATENING WEATHER APPROACHES TAKE SHELTER
IMMEDIATELY.

 ADDISON

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 10, 7:48 PM CDTSevere Thunderstorm WarningMPXSaint Croix42 min
Jun 10, 9:21 PM CDTSevere Thunderstorm WarningMPXChippewa39 min
Jun 10, 10:01 PM CDTSevere Thunderstorm WarningMPXChippewa, Dunn, Eau Claire44 min
Jun 10, 10:01 PM CDTSevere Thunderstorm WarningMPXPepin44 min
Jun 10, 10:43 PM CDTSevere Thunderstorm WarningMPXEau Claire17 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.