Alert archive / Indiana / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 162, NWS Indianapolis, IN

September 29, 1986Benton County, Newton County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Sep 29, 1986, 5:47 PM EST for Benton County, Newton County, Indiana. It was in force for 33 min.

The area

The counties it named.

The facts

Issued
Sep 29, 1986, 5:47 PM EST (22:47 UTC)
Expired
Sep 29, 1986, 6:20 PM EST
In force
33 min
Issued by
NWS Indianapolis, IN
Area
Whole counties

Counties Benton County, IN, Newton 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, 10.8 hours before the alert went out and 190 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 1986-09-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1108 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 1986-09-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 111 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
1108 J/kg
Mixed-layer CIN
-54 J/kg
Mixed-layer LCL
965 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
111 m²/s²
0-3 km storm-relative helicity
124 m²/s²
Significant tornado parameter
0.6
Supercell composite
2.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KIND 292247
SVRIND
INC111-007-292320-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
547 PM EST MON SEP 29 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 620 PM EST FOR PEOPLE IN

SOUTHERN NEWTON COUNTY AND NORTHERN BENTON COUNTY OF NORTHWEST INDIANA.

AT 545 PM EST RADAR SHOWED A SEVERE THUNDERSTORM IN EASTERN IROQUOIS
COUNTY OF NORTHEAST ILLINOIS. THE& STORM WAS MOVING NORTHEAST AT 45 MPH
TOWARD MOROCCO...KENTLAND...AND FOWLER.

THIS STORM OVERTURNED A SEMI IN PONTIAC IN LIVINGSTON COUNTY ILLINOIS.

THIS STORM COULD PRODUCE A SMALL TORNADO WITH LITTLE ADVANCE WARNING.

WVE/DF

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Sep 29, 5:09 PM EST, 38 minutes before
SPECIAL WEATHER STATEMENT AND INDIANA WEATHER SUMMARY
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
505 PM EST MON SEP 29 1986

...A TORNADO WATCH IS IN EFFECT UNTIL 10 PM EST FOR MUCH OF
NORTHERN INDIANA...

THE AREA OF INDIANA NOW INCLUDED IN THE TORNADO WATCH IS NORTH OF A
LINE FROM COVINGTON IN FOUNTAIN COUNTY..TO LAFAYETTE..TO MONTICELLO
IN WHITE COUNTY..TO JUST SOUTHEAST OF FORT WAYNE.

AS OF 435 PM NO SEVERE WEATHER HAD BEEN REPORTED IN INDIANA BUT
THUNDERSTORMS PRODUCED VERY HEAVY RAIN AND WIND GUSTS TO 55 MILES
AN HOUR AT THE MICHIANA REGIONAL AIRPORT IN SOUTH BEND.

A SUMMARY OF INDIANA WEATHER TODAY COULD BE MADE WITH TWO WORDS..
WARM AND WINDY. SKIES WERE PARTLY SUNNY IN THE NORTH AND MOSTLY SUNNY
IN THE SOUTH AS WINDS GUSTED TO 25 AND 30 MILES AN HOUR STATEWIDE
THIS AFTERNOON. LATE AFTERNOON TEMPERATURES RANGED FROM THE MID 80S
IN NORTHERN INDIANA TO THE LOW 90S IN THE SOUTH.

INDIANA WEATHER WILL CONTINUE TO
BE WARM AND HUMID FOR THE NEXT
SEVERAL DAYS AS THE HOOSIER STATE REMAINS IN A WARM SOUTHERLY FLOW
OF AIR BETWEEN HIGH PRESSURE OVER THE EAST COAST AND LOW PRESSURE
OVER THE MISSISSIPPI VALLEY AND SOUTHERN PLAINS.

DF

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 29, 4:52 PM ESTSevere Thunderstorm WarningINDSaint Joseph38 min
Sep 29, 4:52 PM ESTSevere Thunderstorm WarningINDLaPorte38 min
Sep 29, 6:35 PM ESTSevere Thunderstorm WarningINDWhite15 min
Sep 29, 6:55 PM ESTSevere Thunderstorm WarningINDParke, Vermillion45 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.