Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 56, NWS Twin Cities, MN

July 20, 1987Chippewa County, Rusk County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 20, 1987, 11:04 AM CDT for Chippewa County, Rusk County, Wisconsin. It was in force for 41 min.

The area

The counties it named.

The facts

Issued: Jul 20, 1987, 11:04 AM CDT (16:04 UTC)
Expired: Jul 20, 1987, 11:45 AM CDT
In force: 41 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

Counties 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.

The nearest sounding before it

Minneapolis, MN (KSTC), launched 12:00Z, 4.1 hours before the alert went out and 194 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: 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 201604
SVRMSP
WIC107-017-201645-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
1104 AM CDT MON JUL 20 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1145 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

WEST CENTRAL WISCONSIN...
 EASTERN RUSK AND NORTHEAST CHIPPEWA


AT 1100 AM CDT A LINE OF  SEVERE THUNDERSTORMS  WAS LOCATED IN
IN WEST CENTRAL WISCONSIN FROM CENTRAL RUSK INTO NORTH CENTRAL
CHIPPEWA COUNTY.
THE STRONGEST THUNDERSTORMS RAN FROM INGRAM TO NEAR CORNELL OR
ABOUT 30 TO 40 MILES NORTHWEST OF EAU CLAIRE.
THE THUNDERSTORMS WERE MOVING SOUTHEAST AT 25 MILES AN HOUR.
SOME CITIES IN THE PATH OF THESE STORMS WERE HAWKINS AND SHELDON.
LARGE TREES WERE REPORTED DOWN BETWEEN RICE LAKE AND CAMERON AT
1015.

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, 5 hours 45 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 48 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

Local storm report, Jul 20, 10:29 AM CDT, 35 minutes before

NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
1025 AM CDT MON JUL 20 198
      ...ATTN SELS A MSP...

 932 CDT   COMSTOCK WESTERN BARRON COUNTY.  PROPERTY DAMAGE AT
           RESIDENCE.  PICKNICK TABLE PICKED UP AND BLOWN THOUGH THE
           AIR.

 943 CDT   JUST WEST OF RICE LAKE BARRON COUNTY.  TREES DOWN AND
           ROOF OF BARN BLOWN OFF BY STRAIGHT LINE WINDS.

 947 CDT   4 SOUTH OF ALMENA BARRON COUNTY.  PUBLIC REPORT OF FUNNEL.

1008 CDT   JUST WEST OF RICE LAKE BARRON COUNTY.  PUBLIC REPORT OF
           FUNNEL.

WJH

Special weather statement, Jul 20, 11:00 AM CDT, 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST CLOUD MN
1025 AM CDT MON JUL 20 1987

...THE SEVERE THUNDERSTORM WARNING FOR TODD COUNTY HAS NOW EXPIRED

...SEVERE THUNDERSTORM WATCH FOR NORTHERN AND CENTRAL MINNESOTA TILL
1100 AM CDT..

THE SEVERE THUNDERSTORMS WHICH WERE LOACTED IN CENTRAL AND NORTHERN
TODD COUNTY HAVE DECREASED IN INTENSITY.

THUNDERSTORMS CONTINUE TO MOVE ACROSS CENTRAL MINNESOTA AND YOUR
NATIONAL WEATHER SERVICE WILL CONTINUE TO WATCH THESE THUNDERSTORMS
FOR FURTHER DEVELOPMENT.  PLEASE STAY TUNED TO NOAA WEATHER
RADIO...TELEVISION AND YOUR LOCAL RADIO STATION FOR FUTURE UPDATES OR
WARNINGS.

RUBIN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 8:52 AM CDT	Severe Thunderstorm Warning	MPX	Polk	43 min
Jul 20, 9:40 AM CDT	Severe Thunderstorm Warning	MPX	Barron	35 min
Jul 20, 10:18 AM CDT	Severe Thunderstorm Warning	MPX	Barron, Chippewa, Rusk	57 min
Jul 20, 1:50 PM CDT	Severe Thunderstorm Warning	MPX	Dunn, Eau Claire, Pepin	40 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1987 Every 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; the sounding from the Mesonet's radiosonde archive.