Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 28, NWS Twin Cities, MN

July 5, 1987Pierce County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 5, 1987, 7:34 PM CDT for Pierce County, Wisconsin. It was in force for 26 min.

The area

The counties it named.

The facts

Issued
Jul 5, 1987, 7:34 PM CDT (00:34 UTC)
Expired
Jul 5, 1987, 8:00 PM CDT
In force
26 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Pierce 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, 0.6 hours before the alert went out and 94 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 1987-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 555 joules per kilogram.LCLEL10008507005003002001001 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 1987-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 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
555 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
1117 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
83 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 KMSP 060034
SVRMSP
WIC093-060100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
734 PM CDT SUN JUL 5 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 800 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

WEST CENTRAL WISCONSIN...
 EASTERN PIERCE


AT 725 PM WEATHER RADAR CONFIRMS THE PRESENCE OF A SEVERE
THUNDERSTORM OVER EAST PIERCE COUNTY..4 MILES WEST OF PLUM
CITY WHICH IS ABOUT 34 MILES EAST/SOUTHEAST OF DOWNTOWN SAINT
PAUL.

THE STORM IS MOVING NORTHEAST AT 20 MPH SO THIS WOULD PLACE
PLUM CITY AND ROCK ELM IN THE PATH OF THIS STORM.

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 IFt ONE IS SPOTTED.

TOGSTAD

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, 1:50 PM CDT, 5 hours 44 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
145 PM CDT SUN JUL 5 1987

 ...THUNDERSTORMS IN THE TWIN CITIES METROPOLITAN AREA....

THUNDERSTORMS HAVE DEVELOPED RAPIDLY SINCE 100 PM THIS AFTERNOON
IN THE TWIN CITIES METROPOLITAN AREA.  THE THUNDERSTORMS DEVELOPED
INITIALLY WEST OF THE TWIN CITIES AND MOVED ACROSS THE LAKE MINNETONKA
AREA INTO CENTRAL HENNEPIN COUNTY.  OTHER THUNDERSTORMS WERE LOCATED
AROUND SHAKOPEE IN SCOTT COUNTY AND NEAR LAKEVILLE IN DAKOTA COUNTY.

THUNDERSTORMS ARE POSSIBLE DURING THE REST OF THE AFTERNOON OVER
THE TWIN CITIES AREA BECAUSE OF A WARM FRONT LOCATED ACROSS THE
AREA.  THESE THUNDERSTORMS ARE MOVING SLOWLY AND ARE LIKELY TO"
PRODUCE VERY HEAVY RAINS AS WELL AND DANGEROUS LIGHTNING AND
PERIODS OF GUSTY WINDS.
WJH
Special weather statement, Jul 5, 2:17 PM CDT, 5 hours 17 minutes before
SPECIAL WEATHER STATMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
1 58 AM CDT SUN JUL 5 1987

RAPIDLY DEVELOPING THUNDERSTORMS WEST OF THE TWIN CITIES JUST WEST
OF LAKE MINNETONKA NEAR WACONIA...HUTCHINSON AND ST BONIFACIOUS.

AT 1 30 AM CDT...AN AREA OF THUNDERSTORMS DEVELOPED RAPIDLY JUST WEST
OF THE TWIN CITIES IN THE VICINITY OF LAKE MINNETONKA AND WEST.  THESE
ARE EXPECTED TO MOVE EAST NORTHEAST INTO WESTERN HENNEPIN COUNTY BY
1 45 PM.  THESE THUNDERSTORM MAY PRODUCE HEAVY RAIN...GUSTY WINDS...
SMALL HAIL AND FREQUENTLY LIGHTNING.  PARK RANGERS AT LAKE INDEPENDENCE
REPORTED  HEAVY RAIN...GUSTY WINDS AND SMALL HAIL AT 1 50 PM.

LIGHT TO MODERATE SHOWERS WERE SCA?TTERED ACROSS MINNESOTA NORTH OF THE
TWIN CITIES BETWEEN THE MISSISSIPPI RIVER AND THE ST CROIX RIVER AND
NORTH TO AITKN.  IN WISCONISN FROM HAYWARD SOUTH TO 25 MILES EAST OF
EAU CLAIRE.

MOVEMENT WAS NORTHEAST 20 TO 25 MILES AN HOUR.
DME
Special weather statement, Jul 5, 2:42 PM CDT, 4 hours 52 minutes before
SPECIAL WEATHER STATMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
240 PM CDT SUN JUL 5 1987

THUNDERSTORMS IN THE TWIN CITIES METROPOLITIAN AREA AS OF 230 PM
EXTENDED ACROSS NORTH HENNEPIN COUNTY INTO SOUTHERN ANOKA COUNTY
AND IN A SECTION OF RANSEY COUNTY JUST NORTH OF DOWNTOWN ST PAUL.
MAPLE GROVE..BROOKLYN PARK..COON RAPIDS AND BLAINE ARE SOME OF THE
CITIES NEAR THE STRONGEST THUNDERSTORMS.

ANOTHER AREA OF THUNDERTORMS AS OF 230 PM EXTENDED FROM PRIOR LAKE IN
SCOTT COUNTY SOUTH INTO LE SUEUR COUNTY.

VERY HEAVY RAINFALL AND DANGEROUS LIGHTNING CAN BE EXPECTED WITGH THESE
THUNDERSTORMS THROUGH THE AFTERNOON IN THE TWIN CITIES.  SMALL HAIL
IS ALSO POSSIBLE AND PEA SIZE HAIL WKAS REPORTED EARLIER IN RICHFIELD.

THE THUNDERSTORMS WERE MOVING NORTHEAST AND WILL APPROACH THE ST CROIX
RIVER VALLEY AFTER 300 PM.  THOSE OUTDOORS AND ON AREA LAKES SHOULD BE
PREPARED TO MOVE TO SHELTER IF THE SKY TURNS DARK.
WJH
Special weather statement, Jul 5, 3:40 PM CDT, 3 hours 54 minutes before
SPECIAL WEATHER STATMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
330 PM CDT SUN JUL 5 1987

AT 330 PM THUNDERSTORMS WERE LOCATED IN A LINE THROUGH THE HEART OF
THE TWIN CITIES.  THE THUNDERSTORMS EXTENDED FROM NEAR SHAKOPEE
THROUGH THE TWIN CITIES INTERNATIONAL AIRPORT AND DOWNTOWN MINNEAPOLIS.
THESE THUNDERSTORMS WERE MOVING IN ON THE TASTE OF MINNESOTA IN ST PAUL
AND EXTENDED NORTH TO FOREST LAKE IN NORTHERN WASHINGTON COUNTY.

DOWNTOWN MINNEAPOLIS HAS BEEN DRENCHED WITH OVER AN INCH OF RAIN.
0.80 OF AN INCH WAS REPORTED BY WEATHER SERVICE PERSONNEL IN RICHFIELD
AND THE INTERNATIONAL AIRPORT RECEIVED AN UNOFFICAL 0.43 INCHES OF RAIN
ALONG WITH GUSTS OF 35 MILES PER HOUR.

FOR THE TIME BEING IT APPEARS THAT THERE ARE NO MORE THUNDERSTORMS
THREATENING TO MOVE BACK INTO THE TWIN CITIES FROM THE WEST.  A WARM
FRONT DOES EXTEND OVER THE TWIN CITIES HOWEVER AND THE CHANCE OF
SHOWERS AND THUNDERSTORMS WILL REMAIN IN THE FORECAST THROUGH THIS
EVENING.
WJH
Special weather statement, Jul 5, 4:39 PM CDT, 2 hours 55 minutes before
SPECIAL WEATHER STATMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
435 PM CDT SUN JUL 5 1987

..STONG THUNDERSTORMS ENTERING EXTREME WEST CENTRAL WISCONSIN...

AT 430 PM...VERY STRONG THUNDERSTORMS WERE ENTERING WESTERN ST CROIX
COUNTY OF WEST CENTRAL WISCONSIN. AT 430 PM THE THUNDERSTORMS EXTENDED
FROM NEAR NEW RICHMOND TO HUDSON OR ABOUT 25 MILE EAST OF DOWNTOWN ST
PAUL MINNESOTA. THESE THUNDERSTORMS ARE CAPALBLE OF PRODUCING VERY HEAVY
RAIN..HAIL AND GUSTY WINDS UP TO 50 MPH.

THESE THUNDERSTORMS WILL HAVE MOVED THROUGH ST CORIX COUNTY BY 530 PM
AND SHOULD ENTER WESTERN DUNN COUNTY BY 530 PM. SOME CITIES IN THE PATH
OF THESE THUNDERSTORMS ARE HAMMOND..WOODVILLE AND KNAPP. THE STORMS
WERE MOVING EAST AT 30 MPH.

IF THREATENING WEATHER APPROACHES..MOVE TO A PLACE OF SAFETY.
RICHARDSON
Special weather statement, Jul 5, 4:40 PM CDT, 2 hours 54 minutes before
SPECIAL WEATHER STATMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
435 PM CDT SUN JUL 5 1987

..STRONG THUNDERSTORMS ENTERING EXTREME WEST CENTRAL WISCONSIN...

AT 430 PM...VERY STRONG THUNDERSTORMS WERE ENTERING WESTERN ST CROIX
COUNTY OF WEST CENTRAL WISCONSIN. AT 430 PM THE THUNDERSTORMS EXTENDED
FROM NEAR NEW RICHMOND TO HUDSON OR ABOUT 25 MILE EAST OF DOWNTOWN ST
PAUL MINNESOTA. THESE THUNDERSTORMS ARE CAPALBLE OF PRODUCING VERY HEAVY
RAIN..HAIL AND GUSTY WINDS UP TO 50 MPH.

THESE THUNDERSTORMS WILL HAVE MOVED THROUGH ST CORIX COUNTY BY 530 PM
AND SHOULD ENTER WESTERN DUNN COUNTY BY 530 PM. SOME CITIES IN THE PATH
OF THESE THUNDERSTORMS ARE HAMMOND..WOODVILLE AND KNAPP. THE STORMS
WERE MOVING EAST AT 30 MPH.

IF THREATENING WEATHER APPROACHES..MOVE TO A PLACE OF SAFETY.
RICHARDSON

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 4:12 PM CDTTornado WarningMPXSaint Croix33 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; the sounding from the Mesonet's radiosonde archive.