Alert archive / Indiana / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 93, NWS Indianapolis, IN

July 6, 1987Dubois County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Jul 6, 1987, 3:47 PM EST for Dubois County, Indiana. It was in force for 28 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 6, 1987, 3:47 PM EST (20:47 UTC)
Expired: Jul 6, 1987, 4:15 PM EST
In force: 28 min
Issued by: NWS Indianapolis, IN
Area: Whole counties

County Dubois County, IN

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

Time	Report	Where	Remark
Jul 6, 4:10 PM EST	Thunderstorm Wind 0	Dubois, IN

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Salem-Leckrone, IL (KSLO), launched 12:00Z, 8.8 hours before the alert went out and 179 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: 2811 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 724 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 151 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 1.7
Supercell composite: 8.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KEVV 062047
SVREVV
INC037-062115-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EVANSVILLE IN
347 PM CDT MON JUL 6 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 415 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

SOUTHWEST INDIANA...DUBOIS

AT 345 CDT THIS AFTERNOON SEVERE THUNDERSTORMS WERE ENTERING THE
SOUTHWEST INDIANA COUNTY OF DUBOIS. YOU CAN EXPECT WIND) GUSTS
IN EXCESS OF 60 MPH/LARGE HAIL/TORRENTIAL RAINS/AND DEADLY CLOUD
TO GROUND LIGHTNING.

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

 FIELDS

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, Jul 6, 12:15 PM EST, 3 hours 32 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS INDIANA
1215 PM EST MON JUL 6 1987

...THERE IS A SEVERE THUNDERSTORM WATCH FOR SOUTHERN INDIANA UNTIL
   500 PM EST...

THE WATCH IS SOUT OF A LINE FROM 10 MILES NORTH OF VINCENNES TO 45
MILES NORTHEAST OF LOUISVILLE. DANGEROUS LIGHTNING...LARGE HAIL AND
DAMAGING WINDS ARE POSSIBLE IN AND CLOSE TO THE WATCH AREA. HEAVY
RAINFALL IS ALSO POSSIBLE.

AT 1205 PM...THUNDERSTORMS WERE OVER SOUTHWEST INDIANA FROM AROUND
WESTPHALIA...OR 15 MILES NORTHEAST OF VINCENNES...TO JUST WEST OF
BEDFORD. THE STORMS WERE MOVING SLOWLY EAST.

THE STORMS WERE SOME OF THE AREA THAT RECEIVED HEAVY RAINFALL LATE
SATURDAY AFTERNOON. HEAVY RAINFWALL IS POSSIBLE THIS AFTERNOON AND
THAT COULD LEAD TO FLOODING OF LOW AND FLOOD PRONE AREAS. BE ALERT
FOR HEAVY RAINFALL.

Special weather statement, Jul 6, 12:24 PM EST, 3 hours 23 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS INDIANA
1215 PM EST MON JUL 6 1987

...THERE IS A SEVERE THUNDERSTORM WATCH FOR SOUTHERN INDIANA UNTIL
   500 PM EST...

THE WATCH IS SOUTH OF A LINE FROM 10 MILES NORTH OF VINCENNES TO 45
MILES NORTHEAST OF LOUISVILLE. DANGEROUS LIGHTNING...LARGE HAIL AND
DAMAGING WINDS ARE POSSIBLE IN AND CLOSE TO THE WATCH AREA. HEAVY
RAINFALL IS ALSO POSSIBLE.

AT 1205 PM...THUNDERSTORMS WERE OVER SOUTHWEST INDIANA FROM AROUND
WESTPHALIA...OR 15 MILES NORTHEAST OF VINCENNES...TO JUST WEST OF
BEDFORD. THE STORMS WERE MOVING SLOWLY EAST.

THE STORMS WERE OVER SOME OF THE AREA THAT RECEIVED HEAVY RAINFALL
LATE SATURDAY AFTERNOON. H]EAVY RAINFALL IS POSSIBLE THIS AFTERNOON AND
THAT COULD LEAD TO FLOODING OF LOW AND FLOOD PRONE AREAS. BE ALERT
FOR HEAVY RAINFALL.

DS

Special weather statement, Jul 6, 1:21 PM EST, 2 hours 26 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS INDIANA
120 PM EST MON JUL 6 1987

...THERE IS A SEVERE THUNDERSTORM WATCH FOR SOUTHERN INDIANA UNTIL
   500 PM EST...

THE WATCH IS SOUTH OF A LINE FROM 10 MILES NORTH OF VINCENNES TO 45
MILES NORTHEAST OF LOUISVILLE. DANGEROUS LIGHTNING...LARGE HAIL AND
DAMAGING WINDS ARE POSSIBLE IN AND CLOSE TO THE WATCH AREA. HEAVY
RAINFALL IS ALSO POSSIBLE.

AT 115 PM...THUNDERSTORMS WERE OVER SOUTHWEST INDIANA FROM AROUND
THE ILLINOIS STATE LINE NEAR WESTPHALIA...TO 10 MILES WEST OF BEDFORD
NEAR NEWBERRY AND ODON.

STORMS WERE OVER SOME OF THE AREA THAT RECEIVED HEAVY RAINFALL
LATE SATURDAY AFTERNOON. HEAVY RAINFALL IS POSSIBLE THIS AFTERNOON AND
COULD LEAD TO FLOODING OF LOW AND FLOOD PRONE AREAS.

KENYON

Special weather statement, Jul 6, 2:21 PM EST, 1 hour 26 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS INDIANA
219 PM EST MON JUL 6 1987

A SEVERE THUNDERSTORM WARNING IS IN EFFECT FOR LAWRENCE COUNTY UNTIL
250 PM...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR SOUTHERN INDIANA
UNTIL 5 PM...AND A FLASH FLOOD WATCH IS IN EFFECT FOR PART OF WEST
CENTRAL...SOUTHWEST AND SOUTH CENTRAL INDIANA FOR THIS AFTERNOON AND
EVENING.

AT 205 PM EST RADAR SHOWED A LINE OF VERY STRONG THUNDERSTORMS
FROM 30 MILES SOUTH OF TERRE HAUTE TO 10 MILES WEST OF SEYMOUR.
THE MOST THREATENING STORM WAS 5 MILES WEST OF BEDFORD.

THESE STORMS ARE PRODUCING TORRENTIAL RAINS OVER ALREADY RAIN-SOAKED
GROUND. PEOPLE ALONG SMALL STREAMS AND CREEKS SHOULD BE ALERT TO
RAPIDLY RISING WATER. HEAVY RAINS WILL COVER ROADS SO MOTORISTS
SHOULD DRIVE WITH EXTREME CAUTION. DO NOT ATTEMPT TO CROSS FLOWING
WATER.

SOME OF THE STORMS MAY ALSO PRODUCE DAMAGING WINDS...SMALL HAIL AND
FREQUENT DANGEROUS LIGHTNING.

ALLSOPP

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 5:06 AM EST	Flash Flood Warning	IND	Clay, Vigo	2 hr
Jul 6, 5:06 AM EST	Flash Flood Warning	IND	Owen, Putnam	2 hr
Jul 6, 2:10 PM EST	Severe Thunderstorm Warning	IND	Lawrence	40 min
Jul 6, 2:44 PM EST	Severe Thunderstorm Warning	IND	Gibson, Knox	61 min
Jul 6, 3:06 PM EST	Severe Thunderstorm Warning	IND	Pike, Vanderburgh, Warrick	39 min
Jul 6, 3:10 PM EST	Flash Flood Warning	IND	Greene	2 hr
Jul 6, 3:15 PM EST	Severe Thunderstorm Warning	IND	Greene, Lawrence	35 min
Jul 6, 5:12 PM EST	Severe Thunderstorm Warning	IND	Montgomery, Tippecanoe	38 min
Jul 6, 6:18 PM EST	Tornado Warning	IND	Newton	42 min
Jul 6, 6:39 PM EST	Severe Thunderstorm Warning	IND	Jasper	31 min
Jul 6, 6:46 PM EST	Severe Thunderstorm Warning	IND	White	34 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.