Alert archive / Indiana / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 15, NWS Indianapolis, IN

April 25, 1986LaPorte County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Apr 25, 1986, 5:34 PM CST for LaPorte County, Indiana. It was in force for 56 min.

The area

The counties it named.

The facts

Issued
Apr 25, 1986, 5:34 PM CST (23:34 UTC)
Expired
Apr 25, 1986, 6:30 PM CST
In force
56 min
Issued by
NWS Indianapolis, IN
Area
Whole counties

County LaPorte County, IN

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

Peoria Regional, IL (KPIA), launched 12:00Z, 11.6 hours before the alert went out and 259 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, Peoria Regional, IL at 12:00Z on 1986-04-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 103 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, Peoria Regional, IL at 12:00Z on 1986-04-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 146 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
103 J/kg
Mixed-layer CIN
-360 J/kg
Mixed-layer LCL
1341 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
146 m²/s²
0-3 km storm-relative helicity
163 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 KSBN 252335
SVRSBN
INC091-149-099-260030-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SOUTH BEND IN
634 PM EST FRI APR 25 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 730 PM EST FOR PEOPLE IN THE FOLLOWING
COUNTIES OF

NORTH CENTRAL INDIANA...SOUTHERN LAPORTE...STARKE AND MARSHALL

AT 630 PM EST RADAR SHOWED SEVERE THUNDERSTORMS IN SOUTHWEST
LAPORTE COUNTY AND NEAR PLYMOUTH IN MARSHALL COUNTY.

AT 620 PM EST 1 INCH HAIL WAS REPORTED BY HAM RADIO SPOTTER 2 MILES
NORTH OF PLYMOUTH INDIANA.

IF YOU ARE IN THE PATH OF THIS SEVERE THUNDERSTORM GET INTO A REIN-
FORCED SHELTER AND PREPARE FOR STRONG DAMAGING WIND...LARGE HAIL...
VERY HEAVY RAIN AND LIGHTNING.

REPORT SEVERE WEATHER TO YOUR NEAREST LAW ENFORCEMENT AGENCY AND ASK
THEM TO RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE.

SAVAGE

The office that day

Everything else NWS Indianapolis, IN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 25, 4:00 PM CSTSevere Thunderstorm WarningINDKosciusko30 min
Apr 25, 4:38 PM CSTSevere Thunderstorm WarningINDFulton, Kosciusko67 min
Apr 25, 5:34 PM CSTSevere Thunderstorm WarningINDMarshall, Starke56 min

Nearby

Severe Thunderstorm Warnings in Indiana, 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.