Alert archive / Indiana / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 63, NWS Indianapolis, IN

June 22, 1987Gibson County, Indiana; Wabash County, Illinois

NWS Indianapolis, IN issued this severe thunderstorm warning at Jun 22, 1987, 4:44 PM CDT for Gibson County, Indiana; Wabash County, Illinois. It was in force for 31 min.

The area

The counties it named.

The facts

Issued
Jun 22, 1987, 4:44 PM CDT (21:44 UTC)
Expired
Jun 22, 1987, 5:15 PM CDT
In force
31 min
Issued by
NWS Indianapolis, IN
Area
Whole counties

Counties Wabash County, IL, Gibson 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, 9.7 hours before the alert went out and 107 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 1987-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 963 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, Salem-Leckrone, IL at 12:00Z on 1987-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 square meters per square second.1939Sfc1 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
963 J/kg
Mixed-layer CIN
-47 J/kg
Mixed-layer LCL
1146 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
8 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 KEVV 222144
SVREVV
INC051-ILC185-222215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EVANSVILLE IN
444 PM CDT MON JUN 22 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 515 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

SOUTHWEST INDIANA...GIBSON
SOUTHEAST ILLINOIS...WABASH

AT 440 PM CDT...A SEVERE THUNDERSTORM WAS DETECTED BY RADAR
OVER SOUTHEAST ILLINOIS...15 MILES NORTHWEST OF MT CARMEL.
THE STORM WAS MOVING SOUTHEAST 30 MPH.

IF YOU ARE IN AN AREA THREATENED BY THE STORM..GO TO A REINFORECED
SHELTER AND PREPARE FOR DAMAGING WIND...LARGE HAIL...VERY HEAVY
RAIN AND LIGHTNING.

REMEMBER...SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
A TORNADO WITH LITTLE OR NO ADVANCE WARNING SO BE ON THE LOOKOUT.

INTENSE LIGHTNING IS REPORTED WITH THIS STORM.  IF OUTDOORS...
STAY AWAY FROM HIGH OBJECTS.  MOVE INDOORS IF POSSIBLE.  WHEN
INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING
TELEPHONES AND ELECTRICAL EQUIPMENT.

 WRIGHT/ZIMMER

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 8:38 PM CDTSevere Thunderstorm WarningINDLaPorte, Saint Joseph22 min
Jun 22, 6:02 PM CDTSevere Thunderstorm WarningINDVanderburgh28 min

Nearby

Severe Thunderstorm Warnings in Indiana, 1987Severe Thunderstorm Warnings in Illinois, 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.