Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 96, NWS Twin Cities, MN

July 27, 1987Pierce County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 27, 1987, 3:23 AM CDT for Pierce County, Wisconsin. It was in force for 27 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 27, 1987, 3:23 AM CDT (08:23 UTC)
Expired
Jul 27, 1987, 3:50 AM CDT
In force
27 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.

What was reported inside it

TimeReportWhereRemark
Jul 27, 3:30 AM CDTThunderstorm Wind 61Pierce, 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 00:00Z, 8.4 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 1987-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1249 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 00:00Z on 1987-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 52 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
1249 J/kg
Mixed-layer CIN
-148 J/kg
Mixed-layer LCL
978 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
52 m²/s²
0-3 km storm-relative helicity
285 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 270828 COR
SVRMSP
WIC093-270850-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
323 AM CDT MON JUL 27 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 350 AM CDT FOR PEOPLE IN THE FOLLOWING
COUNTY OF

WEST CENTRAL WISCONSIN...
 WESTERN PIERCE


AT 315 AM CDT RADAR INDICATED A SEVERE THUNDERSTORM IN WESTERN
PIERCE COUNTY ABOUT 25 MILES EAST OF DOWNTOWN ST PAUL MINNESOTA.

SOME CITIES IN THE PATH OF THIS STORM ARE ELLSWORTH..BAY CITY.
AND DIAMOND BLUFF.
THE THUNDERSTORM WAS MOVING  SOUTH..SOUTHEAST AT 25 TO 30 MPH.

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.

RICHARDSON

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 27, 2:10 AM CDT, 1 hour 13 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
205 AM CDT MON JUL 27 1987

....STRONG THUNDERSTORMS DEVELOPING OVER EAST CENTRAL MIINESOTA AND
WEST CENTRAL WISCONSIN....

AT 200 AM CDT...RADAR SHOWED A BAND OF STRONG THUNDERSTORMS FROM
STILLWATER IN EAST CENTRAL MINNESOTA SOUTHEAST ACROSS ST CROIX...DUNN...
EAU CLAIRE AND JACKSON COUNTIES OF WISCONSIN.

THE STRONGEST STORMS WERE LOCTATED ALONG THE ST CROIX RIVER EAST OF
STILLWATER AND OVER DUNN COUNTY SOUTHWEST OF WHEELER.

THESE STORMS COULD PRODUCE BRIEF PERIODS OF HEAVY RAIN AND SOME SMALL HAIL
AS THEY MOVE SOUTHEAST AT 35 MILES AN HOUR.

OTHER SHOWERS AND THUNDERSTORMS MAY DEVELOP TO THE WEST OF THISW AREA AND
COULD AFFECT PARTS OF THE NORTHERN TWIN CITIES METRPOLITAN AREA.
STANDFIELD
Special weather statement, Jul 27, 2:54 AM CDT, 29 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
250 AM CDT MON JUL 27 1987

AT 231 AM CDT...STRONG THUNDERSTORMS WITH VERY HEAVY RAINS CONTINUED OVER
EXTREME EAST CENTRAL MINNESOTA INTO WEST CENTRAL AND SOUTHWEST WISCONSIN
FROM STILLWATER MINNESOTA TO NORTHWEST OF MADISON WISCONSIN.

THE STRONGEST STORMS WERE LOCATED OVER AND  ALONG THE ST CROIX RIVER
NEAR STILLWATER AND OVER BALDWIN IN ST CROIX COUNTY...NORTHEAST OF ALMA IN
BUFFALO COUNTY AND NORTHEAST OF LA CROSSE IN WEST CENTRAL WISCONSIN.

PERIODS OF VERY HEAVY RAIN..STRONG GUSTY WINDS AND FREQUENT DANGEROUS
LIGHTNING CAN BE EXPECTED WITH THE STORMS AS THEY MOVE SOUTHEAST AT
30 MILES ANx HOUR.

NO SEVERE WEATHER HAS BEEN REPORTED WITH THE STORMS BUT PERSONS IN EAST
CENTRAL MINNESOTA AND WESTERN WISCONSIN SHOULD BE PREPARED TO MOVE TO
A PLACE OF SAFTETY OF THREATENING WEATHER DEVELOPS.
STANDFIELD

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 27, 2:36 PM CDTSevere Thunderstorm WarningMPXDunn, Pepin39 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.