Alert archive / Indiana / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 60, NWS Indianapolis, IN

June 15, 1987Vermillion County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Jun 15, 1987, 5:48 PM EST for Vermillion County, Indiana. It was in force for 42 min.

The area

The counties it named.

The facts

Issued: Jun 15, 1987, 5:48 PM EST (22:48 UTC)
Expired: Jun 15, 1987, 6:30 PM EST
In force: 42 min
Issued by: NWS Indianapolis, IN
Area: Whole counties

County Vermillion 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, 10.8 hours before the alert went out and 182 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1496 J/kg
Mixed-layer CIN: -176 J/kg
Mixed-layer LCL: 1571 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KIND 152250
SVRIND
INC165-152330-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
548 PM EST MON JUN 15 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 630 PM EST FOR THE FOLLOWING COUNTY OF
 
WEST CENTRAL INDIANA... VERMILLION
 
AT 550 PM EST RADAR INDICATED A SEVERE THUNDERSTORM ABOUT 20 MILES
NORTH OF TERRE HAUTE OR JUST NORTH OF CLINTON.
 
T
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN AND
DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
 
HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS
WHERE WATER COVERS THE ROAD.
 
HENDRICKSON

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

Local storm report, Jun 15, 4:10 PM EST, 1 hour 38 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
410 PM EST MON JUN 15 1987

1530 PM EST
1545 PM EST.....PEA SIZE TO NICKEL SIZE HAIL MADISON COUNTY
                REPORTED BY AMATEUR RADIO. EXACT LOCATION UNKNOWN

1603 PM EST....NORTHEAST MARION COUNTY...96TH AND LANTERN ST
               ONE INCH DIAMETER HAIL REPORTED BY AMATEUR RADIO

1600 PM EST....HAMILTON COUNTY AND MARION COUNTY LINE...ZIONSVILLE
               POLICE...HAIL AND HEyAVY RAIN. HAIL SIZE UNKNOWN
EDWARDS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 15, 2:59 PM EST	Severe Thunderstorm Warning	IND	Hamilton	31 min
Jun 15, 3:19 PM EST	Severe Thunderstorm Warning	IND	Madison, Tipton	41 min
Jun 15, 3:33 PM EST	Severe Thunderstorm Warning	IND	Delaware	42 min
Jun 15, 3:44 PM EST	Severe Thunderstorm Warning	IND	Marion	31 min
Jun 15, 4:15 PM EST	Severe Thunderstorm Warning	IND	Marion	45 min
Jun 15, 4:42 PM EST	Severe Thunderstorm Warning	IND	Hendricks	48 min
Jun 15, 4:54 PM EST	Severe Thunderstorm Warning	IND	Parke	36 min
Jun 15, 5:08 PM EST	Tornado Warning	IND	Hendricks	27 min

Nearby

Severe Thunderstorm Warnings in Indiana, 1987 Every 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.