Alert archive / Minnesota / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 16, NWS Twin Cities, MN

May 13, 1987Dodge County, Olmsted County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 13, 1987, 9:40 PM CDT for Dodge County, Olmsted County, Minnesota. It was in force for 50 min.

The area

The counties it named.

The facts

Issued: May 13, 1987, 9:40 PM CDT (02:40 UTC)
Expired: May 13, 1987, 10:30 PM CDT
In force: 50 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

Counties Dodge County, MN, Olmsted 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, 2.7 hours before the alert went out and 121 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: 732 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 1878 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 191 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KRST 140240
SVRRST
MNC039-109-140330-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ROCHESTER MN
940 PM CDT WED MAY 13 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 1030 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTHEAST MINNESOTA
          ...NORTHEASTERN DODGE...OLMSTED
 
THIS WARNING INCLUDES THE CITY OF ROCHESTER.
 
AT 9:40 PM A SEVERE THUNDERSTORM WAS INDICATED BY RADAR
15 MILES NORTHWEST OF ROCHESTER AND WAS MOVING TO THE SOUTH AT 30
MILES PER HOUR.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

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

Local storm report, May 13, 6:37 PM CDT, 3 hours 3 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST. CLOUD MN
645 PM CDT WED MAY 13 1987

TIME OF             EVENT                   LOCATION
OCCURRENCE
ALL TIMES CDT
505 PM   1/2 INCH HAIL AT 6 MILES NORTH OF CLARA CITY IN CHIPPEWA
         COUNTY OF MINNESOTA...18 MILES SOUTHWEST OF WILLMAR MN.
534 PM   3/4 INCH HAIL AND 40 TO 50 MPH WIND AT LAKE LILLIAN IN
         KANDIYOHI COUNTY OF MINNESOTA...15 MILES SOUTHEAST OF
         WILLMAR MN.
551 PM $  3/4 INCH HAIL AT COSMOS IN MEEKER COUNTY OF MINNESOTA...
         50 MILES SOUTHWEST OF ST. CLOUD.

FRASER

 NAME

Special weather statement, May 13, 6:58 PM CDT, 2 hours 42 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST. CLOUD MN
655 PM CDT WED MAY 13 1987

...SEVERE THUNDERSTORM WATCH FOR SOUTHWEST AND CENTRAL MINNESOTA
UNTIL 900 PM CDT...

AT 650 PM CDT RADAR SHOWED  AN INTENSE THUNDERSTORM IN  NORTHERN
BENTON COUNTY OF CENTRAL MINNESOTA.  AT 645 PM CDT THIS THUNDERSTORM
PRODUCED HEAVY RAIN AT RICE MINNESOTA...12 MILES NORTH OF ST. CLOUD.

OTHER THUNDERSTORMS HAD MOVED EAST OUT OF THE ST. CLOUD AREA.

CONDITIONS STILL REMAIN FAVORABLE FOR ADDITIONAL DEVELOPMENT IN
CENTRAL MINNESOTA.

FRASER

Local storm report, May 13, 7:36 PM CDT, 2 hours 4 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST. CLOUD MN
735 PM CDT WED MAY 13 1987

TIME OF             EVENT                   LOCATION
OCCURRENCE
ALL TIMES CDT
505 PM   1/2 INCH HAIL AT 6 MILES NORTH OF CLARA CITY IN CHIPPEWA
         COUNTY OF MINNESOTA...18 MILES SOUTHWEST OF WILLMAR MN.
534 PM   3/4 INCH HAIL AND 40 TO 50 MPH WIND AT LAKE LILLIAN IN
         KANDIYOHI COUNTY OF MINNESOTA...15 MILES SOUTHEAST OF
         WILLMAR MN.
551 PM   3/4 INCH HAIL AT COSMOS IN MEEKER COUNTY OF MINNESOTA...
         50 MILES SOUTHWEST OF ST. CLOUD.

720 PM   3/4 INCH HAIL 1 MILE NORTH OF MILACA IN MILLE LACS COUNTY
         OF MINNESOTA...28 MILES NORTH OF ST. CLOUD.

FRASER

O

 NAME

Special weather statement, May 13, 8:06 PM CDT, 1 hour 34 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST. CLOUD MN
805 PM CDT WED MAY 13 1987

...SEVERE THUNDERSTORM WATCH FOR SOUTHWEST AND CENTRAL MINNESOTA
UNTIL 900 PM CDT...

AT 800 PM THE THUNDERSTOsRM ACTIVITY HAD ENDED IN THE ST. CLOUD
AREA BUT CONDITIONS REMAIN FAVORABLE IN CENTRAL MINNESOTA FOR
ADDITIONAL DEVELOPMENT.

FRASER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 13, 7:05 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Scott, Sibley	55 min
May 13, 7:05 PM CDT	Severe Thunderstorm Warning	MPX	Mille Lacs	55 min
May 13, 7:34 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Hennepin	36 min
May 13, 7:47 PM CDT	Tornado Warning	MPX	Dakota	33 min
May 13, 7:50 PM CDT	Tornado Warning	MPX	Goodhue	40 min
May 13, 8:08 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Le Sueur	37 min
May 13, 8:08 PM CDT	Severe Thunderstorm Warning	MPX	Rice	37 min
May 13, 8:37 PM CDT	Severe Thunderstorm Warning	MPX	Dodge, Goodhue, Steele	38 min
May 13, 8:37 PM CDT	Severe Thunderstorm Warning	MPX	Waseca	38 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 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.