Alert archive / Minnesota / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 32, NWS Twin Cities, MN

July 10, 1987Rice County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 10, 1987, 2:42 AM CDT for Rice County, Minnesota. It was in force for 48 min.

The area

The counties it named.

The facts

Issued
Jul 10, 1987, 2:42 AM CDT (07:42 UTC)
Expired
Jul 10, 1987, 3:30 AM CDT
In force
48 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Rice County, MN

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, 7.7 hours before the alert went out and 60 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 1987-07-10Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 1987-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2067 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
33 m²/s²
0-3 km storm-relative helicity
114 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 KRST 100742
SVRRST
MNC131-039-049-109-100830-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ROCHESTER MN
242 AM CDT FRI JUL 10 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL  330 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTH CENTRAL MINNESOTA
          ...SOUTHERN RICE
IN SOUTHEAST MINNESOTA
          ...DODGE...SOUTHERN GOODHUE...OLMSTED
 
SOME TOWNS INCLUDED IN THE WARNING ARE FARIBAULT..ZUMBROTA..DODGE
CENTER..KASSON..AND ROCHESTER MINNESOTA.
 
AT 220 AM CDT RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM 45
MILES NORTHWEST OF ROCHESTER NEAR FARIBAULT TO 35 MILES WEST OF
ROCHESTER.  THIS LINE OF THUNDERSTORMS WAS MOVING EAST AT 35 MPH.
 
THESE THUNDERSTORMS PRODUCED WIND GUSTS TO 91 MPH WHEN THEY MOVED
THROUGH THE WASECA AREA OF SOUTHCENTRAL MINNESOTA.
 
 
GO TO A SAFE PLACE IMMEDIATELY.
 
GO TO A SAFE PLACE IMMEDIATELY.

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 9, 9:58 PM CDT, 4 hours 44 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST. CLOUD MN
950 PM CDT THU JULY 9 1987

...TORNADO WATCH UNTIL 200 AM CDT FOR PORTIONS OF WEST CENTRAL
   MINNESOTA...

AT 942 PM CDT RADAR SHOWED A LINE OF INTENSE THUNDERSTORMS WITH VERY
HEAVY RAIN IN WEST CENTRAL MINNESOTA FROM NEAR ORTONVILLE TO NEAR
MARSHALL.

THESE THUNDERSTORMS WERE MOVING SOUTHEAST AT 30 MILES AN HOUR.

LISTEN FOR FURTHER STATEMENTS OR WARNINGS AND BE PREPARED TO MOVE TO
A PLACE OF SAFETY IF SEVERE WEATHER MOVES INTO YOUR AREA.

FRASER
Special weather statement, Jul 9, 11:02 PM CDT, 3 hours 40 minutes before
MKC WW 100358
SDZ000-MNZ000-100358-

BULLETIN
TORNADO WATCH CANCELLATION
NATIONAL WEATHER SERVICE KANSAS CITY MO
1058 PM CDT THU JUL 09  1987

THE NATIONAL SEVERE STORMS FORECAST CENTER HAS CANCELLED
TORNADO WATCH NUMBER 352 ISSUED AT 713  PM CDT  FOR
A LARGE PART OF EASTERN SOUTH DAKOTA
AND PARTS OF SOUTHWEST MINNESOTA

HOWEVER...SEVERE THUNDERSTORM WATCH NUMBER 354 REMAINS IN EFFECT
FOR MUCH OF SOUTHWEST AND SOUTHCENTRAL MINNESOTA.

..HALES..
Special weather statement, Jul 10, 12:44 AM CDT, 1 hour 58 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
1240 AM CDT FRI JUL 10 1987

   ..A LINE OF THUNDERSTORMS IS ADVANCING EAST ACROSS SOUTHERN
     MINNESOTA..

AT 1230 AM CDT WEATHER SERVICE RADAR SHOWED A LINE OF THUNDERSTORMS
IN SOUTHERN MINNESOTA FROM JUST NORTH OF LITCHFIELD IN MEEKER COUNTY TO
NEAR HECTOR IN EASTERN RENVILLE COUNTY..TO AROUND REDWOOD FALLS.  THIS
LINE OF THUNDERSTORMS IS ROUGHLY 50 TO 60 MILES EAST OF MINNEAPOLIS.

THESE THUNDERSTORMS WERE ADVANCING EAST AT 30 TO 35 MILES AN HOUR.
THEY WILL BE MOVING THROUGH WRIGHT...MC LEOD..SIBLEY..AND NICOLLET
COUNTIES BETWEEN 1245 AND 130 AM.  BY 130 AM THESE THUNDERSTORMS WILL
BE MOVING INTO THE WEST TWIN CITIES METRO AREA IN THE COUNTIES OF
HENNEPIN..CARVER..AND SCOTT.

SOME OF THE CITIES IN THE PATH OF STRONGER THUNDERSTORMS ARE..
HUTCHINSON AND GLENCOE IN MCLOED COUNTY.
THESE THUNDERSTORMS HAVE THE CAPABILITY OF PRODUCING `WINDS IN THE
50 MPH RANGE...INTENSE LIGHTNING...SOME HAIL..AND A PERIOD OF
TORRENTIAL RAINS.

IF THREATENING WEATHER APPROACHES YOU...TAKE SHELTER.
PAULSON
Special weather statement, Jul 10, 12:48 AM CDT, 1 hour 54 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY..CORRECTION PARA 1 LINE 4
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
1240 AM CDT FRI JUL 10 1987

   ..A LINE OF THUNDERSTORMS IS ADVANCING EAST ACROSS SOUTHERN
     MINNESOTA..

AT 1230 AM CDT WEATHER SERVICE RADAR SHOWED A LINE OF THUNDERSTORMS
IN SOUTHERN MINNESOTA FROM JUST NORTH OF LITCHFIELD IN MEEKER COUNTY TO
NEAR HECTOR IN EASTERN RENVILLE COUNTY..TO AROUND REDWOOD FALLS.  THIS
LINE OF THUNDERSTORMS IS ROUGHLY 50 TO 60 MILES WEST OF MINNEAPOLIS.

THESE THUNDERSTORMS WERE ADVANCING EAST AT 30 TO 35 MILES AN HOUR.
THEY WILL BE MOVING THROUGH WRIGHT...MC LEOD..SIBLEY..AND NICOLLET
COUNTIES BETWEEN 1245 AND 130 AM.  BY 130 AM THESE THUNDERSTORMS WILL
BE MOVING INTO THE WEST TWIN CITIES METRO AREA IN THE COUNTIES OF
HENNEPIN..CARVER..AND SCOTT.

SOME OF THE CITIES IN THE PATH OF STRONGER THUNDERSTORMS ARE..
HUTCHINSON AND GLENCOE IN MCLOED COUNTY.
THESE THUNDERSTORMS HAVE THcE CAPABILITY OF PRODUCING WINDS IN THE
50 MPH RANGE...INTENSE LIGHTNING...SOME HAIL..AND A PERIOD OF
TORRENTIAL RAINS.

IF THREATENING WEATHER APPROACHES YOU...TAKE SHELTER.
PAULSON
Special weather statement, Jul 10, 1:27 AM CDT, 1 hour 15 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
125 AM CDT FRI JUL 10 1987

   ..INTENSE THUNDERSTORMS MOVING THROUGH EAST CENTRAL AND SOUTH CENTRAL
     MINNESOTA..

AT 120 AM CDT INTENSE THUNDERSTORMS WERE OCCURRING ALONG A LINE THAT
EXTENDED FROM NORTHWEST OF THE TWIN CITIES NEAR MONTICELLO IN NORTHERN
WRIGHT COUNTY..SOUTH TO NEAR WACONIA IN THE CENTRAL PART OF CARVER COUNTY
TO NEAR GAYLORD IN SIBLEY COUNTY.

THESE THUNDERSTORMS ARE EXPECTED TO MOVE INTO SOUTHERN TO EASTERN HENNIPEN
AND CENTRAL SCOTT COUNTY BY 145 AM. SOME CITIES THAT WILL BE AFFECTED BY
THESE THUNDERSTORMS WILL BE ANOKA..MINNETONKA..JORDAN AND CHASKA.

NO SEVERE WEATHER HAS BEEN REPORTED WITH THIS ACTIVITY BUT STRONG GUSTY
WINDS OF 45 TO 55 MILES AN HOUR..FREQUENT LIGHTNING STRIKES AND HAIL
CAN BE EXPECTED AS THESE THUNDERSTORMS MOVE EAST AT 35 TO 40 MILES AN
HOUR.

ELSEWHERE ANOTHER AREA OF STRONG THUNDERSTORMS WAS OCCURRING IN SOUTH
CENTRAL MINNESOTA SOUTHWEST OF MANKATO IN WATONWAN COUNTY. AT 120 AM
PEA SIZE HAIL AND GUSTY WINDS WERE REPORTED IN THE ST JAMES AREA.

THESE THUNDERSTORMS WERE ALSO MOVING EAST AT 35 TO 40 MILES AN HOUR.

PERSONS IN SOUTHERN MINNESOTA SHOULD REMAIN ALERT AND KEEP ABREAST OF
THIS DEVELOPING WEATHER SITUATION. FURTHER STATEMENTS AND POSSIBLE
WARNINGS MAY BE ISSUED.

MUCH OF SOUTHWEST AND SOUTH CENTRAL MINNESOTA REMAINS UNDER A SEVERE
THUNDERSTORM WATCH UNTIL 500 AM
SWANBERG
Special weather statement, Jul 10, 2:11 AM CDT, 31 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
205 AM CDT FRI JUL 10 1987

   ..VERY STRONG THUNDERSTORMS MOVING THROUGH EAST CENTRAL AND SOUTH
     CENTRAL MINNESOTA..

AT 205 AM CDT A LINE OF STRONG THUNDERSTORMS WAS MOVING EAST THROUGH
THE TWIN CITIES METRO AREA.  IT EXTENDED FROM NEAR FOREST LAKE IN
NORTHERN WASHINGTON COUNTY THROUGH DOWNTOWN ST PAUL AND SOUTH THROUGH
LAKEVILLE IN WESTERN DAKOTA COUNTY.   IT CONTINUED TO MOVE RAPIDLY
EAST AT AROUND 40 MPH....AND WILL CONTINUE TO PUSH EAST ACROSS THE
EASTERN METRO AREA AND INTO WESTCENTAL WISCONSIN.  THESE THUNDERSTORMS
WILL BE CROSSING INTO WESTERN WISCONSIN IN PIERCE AND ST CROIX
COUNTIES AROUND 220 PM.

AT 203 AM WINDS GUSTED TO 43 MPH AT THE INTERNATIONAL AIRPORT IN THE
TWIN CITIES.

THESE THUNERSTORMS HAVE WEAKENED SOMEWHAT SINCE 130 AM..BUT STILL HAVE THE
THE POTENTIAL OF PRODUCING 40 TO 50 MPH WINDS..SMALL HAIL..AND
A BRIEF PERIOD OF TORRENTIAL RAIN AS WELL AS LIGHTNING STRIKES.

OTHER VERY STRONG THUNDERSTORMS CONTINUED ABOUT 40 TO 50 MILES SOUTH
OF THE TWIN CITIES IN WASECA AND STEELE COUNTIES IN THE WASCEA AND
OWATONNA AREA.

IF THREATENING WEATHER APPROACHES YOU..SEEK SHELTER.

REMEMBER THAT A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL
5AM FOR MUCH OF SOUTHWEST AND SOUTHCENTRAL MINESOTA.
PAULSON

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 10, 2:09 AM CDTSevere Thunderstorm WarningMPXLe Sueur, Steele, Waseca51 min
Jul 10, 2:42 AM CDTSevere Thunderstorm WarningMPXDodge, Goodhue, Olmsted48 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 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.