Alert archive / Minnesota / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 140, NWS Twin Cities, MN

July 30, 1986Yellow Medicine County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 30, 1986, 12:17 AM CDT for Yellow Medicine County, Minnesota. It was in force for 43 min.

The area

The counties it named.

The facts

Issued: Jul 30, 1986, 12:17 AM CDT (05:17 UTC)
Expired: Jul 30, 1986, 1:00 AM CDT
In force: 43 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

County Yellow Medicine 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, 5.3 hours before the alert went out and 180 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: 1530 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 1238 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 300517
SVRSTC
MNC173-300600-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAINT CLOUD MN
ISSUED BY MINNEAPOLIS MN
1217 AM CDT WED JUL 30 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 100 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

WEST CENTRAL MINNESOTA...WESTERN YELLOW MEDICINE

AT.....1210 AM CDT RADAR INDICATED A SEVERE THUNDERSTORM OVER
EXTREME EASTERN SOUTH DAKOTA ABOUT 20 MILES EAST..SOUTHEAST
OF WATERTOWN SOUTH DAKOTA.

THIS THUDERSTORM HAS BEEN PRODUCING SEVERE WEATHER IN EASTERN
SOUTH DAKOTA.

SOME CITIES IN THE PATH OF THIS STORM ARE CANBY AND PORTER.
THE THUNDERSTORM WAS MOVING EAST..SOUTHEAST AT 25 MPH.

REMEMBER SEVERE THUNDERSTORMS PRODUCE STRONG DAMAGING WINDS..LARGE
HAIL AND FREQUENT LIGHTNING STRIKES. 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

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 2:00 AM CDT	Severe Thunderstorm Warning	MPX	Big Stone, Lac qui Parle	60 min
Jul 30, 2:04 AM CDT	Severe Thunderstorm Warning	MPX	Redwood	56 min
Jul 30, 2:22 AM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle, Pope, Swift	38 min
Jul 30, 2:22 AM CDT	Severe Thunderstorm Warning	MPX	Yellow Medicine	38 min
Jul 30, 3:00 AM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi	45 min
Jul 30, 3:00 AM CDT	Severe Thunderstorm Warning	MPX	Yellow Medicine	45 min
Jul 30, 3:09 AM CDT	Severe Thunderstorm Warning	MPX	Redwood, Renville	26 min
Jul 30, 5:14 AM CDT	Severe Thunderstorm Warning	MPX	Brown, Nicollet	46 min
Jul 30, 5:38 AM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Le Sueur	52 min
Jul 30, 7:52 AM CDT	Severe Thunderstorm Warning	MPX	Olmsted, Wabasha, Winona	38 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1986 Every 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; the sounding from the Mesonet's radiosonde archive.