Alert archive / Minnesota / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 45, NWS Twin Cities, MN

June 15, 1986Waseca County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 15, 1986, 9:13 PM CDT for Waseca County, Minnesota. It was in force for 92 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
Jun 15, 1986, 9:13 PM CDT (02:13 UTC)
Expired
Jun 15, 1986, 10:45 PM CDT
In force
92 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Waseca County, MN

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
Jun 15, 9:35 PM CDTHail 1.75Waseca, MN

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, 2.2 hours before the alert went out and 92 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 1986-06-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 804 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 1986-06-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -509 square meters per square second.1939587897117136156Sfc1 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
804 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
1903 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
-509 m²/s²
0-3 km storm-relative helicity
-555 m²/s²
Significant tornado parameter
-0.2
Supercell composite
-12.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KRST 160216 COR
SVRRST
MNC161-160345-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNINGCORRECTION
NATIONAL WEATHER SERVICE ROCHESTER MN
913 PM CDT SUN JUN 15 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 1045 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTY OF

SOUTH CENTRAL MINNESOTA...WASECA

INCLUDES THE CITY OF WASECA.

 A SEVERE THUNDERSTORM PRODUCES STRONG DAMAGING WINDS..LARGE HAIL
 ..VERY HEAVY RAIN AND DANGEROUS LIGHTNING.

 REMEMBER THESE STORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO
 WITH LITTLE OR NOW ADVANCE WARNING SO BE ON THE LOOKOUT.
  AT 905 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES
 SOUTH OF MANKATO MOVING TOWARDS THE EAST AT 25 MPH.

 BARNES

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 15, 7:01 PM CDTSevere Thunderstorm WarningMPXMcLeod, Renville, Sibley59 min
Jun 15, 7:39 PM CDTSevere Thunderstorm WarningMPXCarver, Hennepin, McLeod, Wright51 min
Jun 15, 8:39 PM CDTSevere Thunderstorm WarningMPXLe Sueur, Nicollet66 min
Jun 15, 8:54 PM CDTTornado WarningMPXBlue Earth, Le Sueur21 min
Jun 15, 9:55 PM CDTTornado WarningMPXFreeborn20 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1986Every severe thunderstorm warning in 1986

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.