Alert archive / Minnesota / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 69, NWS Twin Cities, MN

June 21, 1986Chippewa County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 21, 1986, 6:45 PM CDT for Chippewa County, Minnesota. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Jun 21, 1986, 6:45 PM CDT (23:45 UTC)
Expired
Jun 21, 1986, 7:45 PM CDT
In force
60 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Chippewa 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 12:00Z, 11.8 hours before the alert went out and 156 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 12:00Z on 1986-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 318 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 12:00Z on 1986-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 89 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
318 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
727 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
89 m²/s²
0-3 km storm-relative helicity
106 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTC 212345
SVRSTC
MNC023-067-093-220045-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST CLOUD MN
645 PM CDT SAT JUN 21 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 745 PM  CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

CENTRAL MINNESOTA...MEEKER..KANDIYOHI AND EASTERN CHIPPEWA.

AT 645 PM CDT RADAR INDICATED A LINE OF SEVERE  THUNDERSTORMS IN
CENTRAL MINNESOTA MOVING TO THE EAST AT 40 MPH.

PERSONS IN LOW LYING AREAS SHOULD BE AWARE OF RAPIDLY RISING STREAMS
DUE TO VERY HEAVY RAINS IN THESE AREAS

REMEMBER THESE STORMS CAN AND OCCASIONALLY PRODUCE A TORNADO WITH
LITTLE OR NO ADVANCE WARNING SO BE ON THE LOOK OU_T.

IF THREATENING WEATHER APPROACHES..YOU SHOULD GO TO A SAFE PLACE
IMMEDIATELY..AND YOU SHOULD ASK THE NEAREST LAW ENFORCEMENT AGENCY TO
RELAY YOUR SEVERE WEATHER REPORTS TO THE LOCAL NATIONAL WEATHER
SERVICE OFFICE.

FRASER/TRIPLETT

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 4:25 PM CDTSevere Thunderstorm WarningMPXPope, Stearns55 min
Jun 21, 4:25 PM CDTSevere Thunderstorm WarningMPXSwift55 min
Jun 21, 4:30 PM CDTSevere Thunderstorm WarningMPXMorrison, Todd60 min
Jun 21, 5:25 PM CDTSevere Thunderstorm WarningMPXKandiyohi, Swift65 min
Jun 21, 5:45 PM CDTSevere Thunderstorm WarningMPXBenton, Stearns55 min
Jun 21, 6:25 PM CDTSevere Thunderstorm WarningMPXMeeker60 min
Jun 21, 6:25 PM CDTSevere Thunderstorm WarningMPXSherburne60 min
Jun 21, 6:45 PM CDTSevere Thunderstorm WarningMPXKandiyohi, Meeker60 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; the sounding from the Mesonet's radiosonde archive.