Alert archive / Minnesota / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 173, NWS Twin Cities, MN

September 10, 1986Brown County, Watonwan County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 10, 1986, 8:58 AM CDT for Brown County, Watonwan County, Minnesota. It was in force for 32 min.

The area

The counties it named.

The facts

Issued
Sep 10, 1986, 8:58 AM CDT (13:58 UTC)
Expired
Sep 10, 1986, 9:30 AM CDT
In force
32 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Brown County, MN, Watonwan 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, 2.0 hours before the alert went out and 118 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 1986-09-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1986-09-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
547 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
94 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KRST 101358
SVRRST
MNC015-165-101430-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ROCHESTER MN
858 AM CDT WED SEP 10 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 930 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

SOUTH CENTRAL MINNESOTA...BROWN AND WATONWAN

THIS WARNING INCLUDES THE TOWNS OF SLEEPY EYE..NEW ULM AND
ST. JAMES. AT 845AM RADAR INDICATED A SEVERE THUNDEDRSTORM
10 MILES NORTH OF ST. JAMES MN AND 20 MILES SOUTHWEST OF
SPRINGFIELD. AT 843 AM CDT 3 INCH HAIL WAS REPORTED 10 MILES
NORTHWEST OF ST. JAMES IN NORTH WATONWAN COUNTY

 IF YOU ARE IN OR NEAR THE WARNED AREA GET TO A REINFORCED SH*ELTER
 AND PREPARE FOR STRONG DAMAGING WIND..LARGE HAIL..VERY HEAVY RAIN
 AND DANGEROUS LIGHTNING.

 AMANN

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.