Alert archive / Minnesota / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 106, NWS Twin Cities, MN

August 2, 1987Morrison County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 2, 1987, 11:34 PM CDT for Morrison County, Minnesota. It was in force for 56 min.

The area

The counties it named.

The facts

Issued
Aug 2, 1987, 11:34 PM CDT (04:34 UTC)
Expired
Aug 3, 1987, 12:30 AM CDT
In force
56 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Morrison 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, 4.6 hours before the alert went out and 139 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 1987-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2050 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 1987-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 square meters per square second.19395878Sfc1 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
2050 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
1462 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
71 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 KSTC 030445 RRA
SVRSTC
MNC097-030530-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAINT CLOUD MN
1134 PM CDT SUN AUG 2 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 1230 AM CDT FOR PEOPLE IN THE FOLLOWING
COUNTY 0F

CENTRAL MINNESOTA...NORTHERN HALF OF MORRISON...INCLUDING THE CITIES
OF CUSHING...RANDALL...LITTLE FALLS...FORT RIPLEY...HARDING...      
SHEPHARD...AND LASTRUP.

AT 1128 PM CDT RADAR INDICATES A SEVERE THUNDERSTORM IN CENTRAL TODD
COUNTY JUST WEST OF THE CITY OF CUSHING...44 MILES NORTH NORTHWEST OF
ST. CLOUD MINNESOTA.  THESE THUNDERSTORMS HAVE A HISTORY OF VERY    
LARGE HAIL...UP TO ONE INCH...AND EXTREMELY HEAVY RAIN AS THEY MOVE
EAST AT 30 MILES PER HOUR.                                        
                                                                   
                    

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 IjS SPOTTED.

TRIPLETT

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, Aug 2, 9:57 PM CDT, 1 hour 37 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
955 PM CDT SUN AUG 2 1987

...SEVERE THUNDERSTORM WATCH IN EFFECT FOR PORTIONS OF CENTRAL
AND NORTHERN MINNESOTA UNTIL 3 AM CDT MONDAY MORNING...

AT 928 PM CDT...INTENSE THUNDERSTORMS CONTINUED OVER WEST CENTRAL AND
CENTRAL MINNESOTA FROM 30 MILES NORTH OF ALEXANDRIA TO NEAR PARK RAPIDS
TO DETROIT LAKES TO THE MINNESOTA/NORTH DAKOTA BORDER 45 MILES SOUTH
OF FARGO.

NO SEVERE WEATHER HAS BEEN REPORTED WITH THESE STORMS BUT VERY HEAVY
RAINS AND MARBLE SIZE HAIL WAS REPORTED WITH THE STORMS AS THEY MOVED EAST
AT 30 MILES AN HOUR.

PERSONS IN CENTRAL AND NORTHERN MINNESOTA IN THE WATCH AREA SHOULD BE
ON THE LOO-KOUT FOR THESE THUNDERSTORMS AND BE PREPARED TO SEEK SAFE
SHELTER IF THREATENING WEATHER DEVELOPS.
STANDFIELD
Special weather statement, Aug 2, 10:52 PM CDT, 42 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
1050 PM CDT SUN AUG 2 1987

...SEVERE THUNDERSTORM WATCH IN EFFECT FOR PORTIONS OF CENTRAL
AND NORTHERN MINNESOTA UNTIL 3 AM CDT MONDAY MORNING...

AT 1031 PM CDT...AN INTENSE THUNDERSTORM WAS LOCATED 35 MILES SOUTHWEST
OF BRAINERD NEAR EAGLE BEND IN CENTRAL MINNESOTA.

VERY HEAVY RAINS...FREQUENT DANGEROUS LIGHTNING AND SOME HAIL ARE LIKELY
WITH THIS STORM AS IT MOVED EAST AT 30 MILES AN HOUR.

THE STORM WAS PART OF AN AREA OF STRONG THUNDERSTORMS THAT EXTENDED FROM
JUST NORTH OF ALEXANDRIA TO NORTH OF MILLE LACS LAKE TO 30 MILES SOUTH OF
BEMIDJI TO THE MINNEOSTA/NORTH DAKOTA BORDER SOUTHEAST OF FARGO.
THE SHTORMS WERE MOVING

NO SEVERE WEATHER HAS BEEN REPORTED BUT PERSONS IN THESE AREAS SHOULD BE
PREPARED TO MOVE TO A PLACE OF SAFETY IF SEVERE WEATHER DEVELOPS.

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.