Alert archive / Indiana / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 111, NWS Indianapolis, IN

July 15, 1987Parke County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Jul 15, 1987, 3:25 PM EST for Parke County, Indiana. It was in force for 35 min.

The area

The counties it named.

The facts

Issued
Jul 15, 1987, 3:25 PM EST (20:25 UTC)
Expired
Jul 15, 1987, 4:00 PM EST
In force
35 min
Issued by
NWS Indianapolis, IN
Area
Whole counties

County Parke 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

Salem-Leckrone, IL (KSLO), launched 12:00Z, 8.4 hours before the alert went out and 192 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, Salem-Leckrone, IL at 12:00Z on 1987-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 16 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Salem-Leckrone, IL at 12:00Z on 1987-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 47 square meters per square second.193958Sfc1 km3 km6 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
16 J/kg
Mixed-layer CIN
-58 J/kg
Mixed-layer LCL
1306 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
47 m²/s²
0-3 km storm-relative helicity
84 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 KIND 152024
SVRIND
INC121-151600-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
325 PM EST WED JUL 15 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 400 PM EST FOR PEOPLE IN THE FOLLOWING
COUNTY OF

WEST CENTRAL INDIANA    PARKE

AT 320 PM EST...RADAR SHOWED A SEVERE THUNDERSTORM ABOUT 15 MILES
NORTH OF TERRE HAUTE OR ABOUT 10 MILES WEST OF ROCKVILLE. THIS STORMS
WAS MOVING TO THE EAST AT 30 MILES AND HOUR.

THE TOWN OF ROCKVILLE IS IN THE PATH OF THIS STORM.

A SEVERE THUNDERSTORMS PRODUCES DAMAGING WINDS IN EXCESS OF
60 MILES AN HOUR...LARGE HAIL AND FREQUENT LIGHTNING.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY FOR
RELAY TO THE NATIONAL WEATHER SERVICE.

HENDRICKSON

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 3:32 PM ESTTornado WarningINDParke, Vermillion28 min
Jul 15, 3:46 PM ESTSevere Thunderstorm WarningINDBrown34 min
Jul 15, 4:12 PM ESTSevere Thunderstorm WarningINDClay33 min
Jul 15, 4:20 PM ESTSevere Thunderstorm WarningINDBartholomew40 min
Jul 15, 5:11 PM ESTSevere Thunderstorm WarningINDJackson, Jennings29 min
Jul 15, 5:28 PM ESTTornado WarningINDCarroll, Cass32 min

Nearby

Severe Thunderstorm Warnings in Indiana, 1987Every severe thunderstorm warning in 1987

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.