Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 55, NWS Twin Cities, MN

July 20, 1987Barron County, Chippewa County, Rusk County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 20, 1987, 10:18 AM CDT for Barron County, Chippewa County, Rusk County, Wisconsin. It was in force for 57 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jul 20, 1987, 10:18 AM CDT (15:18 UTC)
Expired
Jul 20, 1987, 11:15 AM CDT
In force
57 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Barron County, WI, Chippewa County, WI, Rusk County, WI

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
Jul 20, 10:30 AM CDTThunderstorm Wind 0Rusk, WI

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Minneapolis, MN (KSTC), launched 12:00Z, 3.3 hours before the alert went out and 179 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 1987-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4599 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 12:00Z on 1987-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 134 square meters per square second.193958Sfc1 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
4599 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
604 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
134 m²/s²
0-3 km storm-relative helicity
192 m²/s²
Significant tornado parameter
0.0
Supercell composite
15.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 201518
SVRMSP
WIC005-107-017-201615-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
1018 AM CDT MON JUL 20 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1115 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

WEST CENTRAL WISCONSIN...
 EASTERN BARRON...WESTERN RUSK AND 
 NORTHWEST CHIPPEWA


AT 1010 AM CDT A SEVERE THUNDERSTORM WAS LOCATED IN WESTCENTRAL
WISCONSIN NEAR THE BARRON..RICE LAKE AREA OF CENTRAL BARRON
COUNTY.  THIS SEVERE THUNDERSTORM WAS MOVING EAST TO SOUTHEAST
ABOUT 40 MPH.  SOME CITIES IN THE PATH OF THIS SEVERE THUNDER
STORM ARE WEYERHAUSER IN WESTERN RUSK COUNTY AND NEW AUBURN IN
NORTHWEST CHIPPEWA COUNTY.  SOME DAMAGE WAS REPORTED JUST WEST OF
THE CITY OF RICE LAKE JUST BEFORE 10AM TO A BARN AND SOME TREES.

REMEMBER SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60
MPH..DESTRUCTIVE HAIL..DEADLY LIGHTNING AND VERY HEAVY RAIN. 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.

PAULSON

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 20, 5:19 AM CDT, 4 hours 59 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
510 AM CDT MON JUL 20 1987

...PART OF SOUTHWEST MINNESOTA IS BEING CLEARED FROM SEVERE THUNDERSTORM
   WATCH NUMBER 400...

THE COUNTIES OF LINCOLN..PIPESTONE..ROCK..LAC QUE PARLE AND WESTERN
YELLOW MEDICINE HAVE BEEN CLEARED FROM SEVERE THUNDERSTORM WATCH NUMBER
400 AS OF 5AM CDT THIS MONDAY MORNING. HOWEVER THE WATCH
CONTINUES FOR THE REMAINDER OF THE WATCH AREAS OVER EXTREME WEST CENTRAL
MINNESOTA UNTIL 7AM THIS MONDAY MORNING. AND ANOTHER SEVERE THUNDERSTORM
WATCH IS NOW BEING ISSUED FOR CENTRAL MINNESOTA. DETAILS ON THAT WATCH
ARE HAVE JUST BEEN ISSUED.

THUNDERSTORMS CONTINUE OVER WEST CENTRAL MINNESOTA AND ARE MOVING
TOWARD THE EAST NORTHEAST INTO CENTRAL SECTIONS OF THE STATE.
SEVERAL WARNINGS HAVE BEEN ISSUED FOR THESE THUNDERSTORMS AS THEY MOVED
INTO WEST CENTRAL SECTIONS.
WILLIS
Special weather statement, Jul 20, 7:16 AM CDT, 3 hours 2 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST. CLOUD MN
705 AM CDT MON JUL 20 1987

...SEVERE THUNDERSTORM WATCH UNTIL 11 AM CDT...

...LINE OF STRONG THUNDERSTORMS MOVING TOWARD MILLE LACS LAKE...

AT 700 AM CDT RADAR SHOWED A LINE OF STRONG THUNDERSTORMS EXTENDING
FROM HILL CITY TO THE WESTERN EDGE OF MILLE LACS LAKE TO WEST OF
ST CLOUD. THESE THUNDERSTORMS WERE MOVING EAST NORTHEAST AT 35 MPH
AND WILL BE AFFECTING THE MILLE LACS LAKE AREA UNTIL ABOUT 9 AM CDT.

THUNDERSTORMS IN THIS LINE HAVE PRODUCED VERY HEAVY RAINS...FREQUENT
LIGHTNING AND WINDS GUSTING TO NEAR 45 MPH.

BOATERS...FISHERPERSONS...AND OTHERS ENGAGED IN OUTDOOR ACTIVITIES IN
THE MILLE LACS LAKE AREA SHOULD TAKE NECESSARY PRECAUTIONS.

YOUNG

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 20, 8:52 AM CDTSevere Thunderstorm WarningMPXPolk43 min
Jul 20, 9:40 AM CDTSevere Thunderstorm WarningMPXBarron35 min
Jul 20, 11:04 AM CDTSevere Thunderstorm WarningMPXChippewa, Rusk41 min
Jul 20, 1:50 PM CDTSevere Thunderstorm WarningMPXDunn, Eau Claire, Pepin40 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1987Every severe thunderstorm warning in 1987

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.