Alert archive / Indiana / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 73, NWS Indianapolis, IN

June 29, 1987Boone County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Jun 29, 1987, 5:54 PM EST for Boone County, Indiana. It was in force for 36 min.

The area

The counties it named.

The facts

Issued
Jun 29, 1987, 5:54 PM EST (22:54 UTC)
Expired
Jun 29, 1987, 6:30 PM EST
In force
36 min
Issued by
NWS Indianapolis, IN
Area
Whole counties

County Boone 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

Dayton/James M C, OH (KDAY), launched 12:00Z, 10.9 hours before the alert went out and 194 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, Dayton/James M C, OH at 12:00Z on 1987-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 156 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, Dayton/James M C, OH at 12:00Z on 1987-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 131 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
156 J/kg
Mixed-layer CIN
-93 J/kg
Mixed-layer LCL
874 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
131 m²/s²
0-3 km storm-relative helicity
132 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 292254
SVRIND
INC011-292330-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
554 PM EST MON JUN 29 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 630 PM EST FOR THE FOLLOWING COUNTY OF
 
CENTRAL INDIANA... BOONE

AT 550 PM EST RADAR INDICATED A SEVERE THUNDERSTORM ABOUT 25 MILES
SOUTH OF LAFAYETTE OR JUST TO THE EAST OF CRAWFORDVILLE.  THE COUNTY
SHERIFF IN CRAWFORDSVILLE REPORTED NUMEROUS TREES DOWN AND SOME POWER
LINES HAVE ALSO BEEN BLOWN DOWN IN THE CRAWFORDSVILLE AREA.
 
THIS THUNDERSTORM WAS MOVING EAST AT 40 MPH AND WILL MOVE TO NEAR
LEBANON BY 620 PM EST.
 
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.
 
THESE STORMS CAN ALSO PRODUCE A SMALL TORNADO WITH LITTLE OR NO
ADVANCE WARNINFG.
 
JEH

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, Jun 29, 2:37 PM EST, 3 hours 17 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS INDIANA
235 PM EST MON JUN 29 1987

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PORTIONS OF NORTHERN
INDIANA UNTIL 900 PM EST...

AT 230 PM EST...INDIANAPOLIS RADAR SHOWED A SMALL AREA OF INTENSE
THUNDERSTORMS OVER PARTS OF EAST CENTRAL ILLINOIS.

THE AREA OF THUNDERSTORMS EXTENDED FROM 45 MILES NORTHWEST OF
LAFAYETTE NEAR MOROCCO IN CENTRAL NEWTON COUNTY TO ABOUT 15 MILES
EAST OF BLOOMINGTON ILLINOIS.

THE STRONGEST THUNDERSTORM WAS LOCATED ABOUT 35 MILES NORTH OF
CHAMPAIGN ILLINOIS IN CENTRAL FORD COUNTY ILLINOIS.

THIS AREA OF THUNDERSTORMS WILL PASS THROUGH NEWTON...JASPER AND
NORTHERN BENTON COUNTIES IN NORTHWEST INDIANA BETWEEN 240 AND 320 PM
EST THIS AFTERNOON.
.
GUSTY SURFACE WINDS...HAIL...HEAVY RAINFALL AND DANGEROUS LIGHTNING
WILL ACCOMPANY SOME OF THE STRONGER THUNDERSTORMS.

THE THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT 45 MILES AN HOUR.
PRZYBYLINSKI
Special weather statement, Jun 29, 3:27 PM EST, 2 hours 27 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS INDIANA
325 PM EST MON JUN 29 1987

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PORTIONS OF NORTHERN
INDIANA UNTIL 900 PM EST...

AT 320 PM EST...INDIANAPOLIS RADAR SHOWED AN AREA OF INTENSE
THUNDERSTORMS OVER PARTS OF NORTHWEST AND WEST CENTRAL INDIANA.

THE AREA OF THUNDERSTORMS EXTENDED FROM CENTRAL PULASKI COUNTY
...OR ABOUT 45 MILES NORTH OF LAFAYETTE TO ABOUT 15 MILES NORTH
OF CHAMPAIGN ILLINOIS.

THE STRONGEST THUNDERSTORMS WERE LOCATED NEAR RENNSELAER IN SOUTHERN
JASPER COUNTY AND OVER SOUTHWEST BENTON...NORTHWEST WARREN COUNTIES
...OR ABOUT 30 MILES WEST OF LAFAYETTE.
.
GUSTY SURFACE WINDS...HAIL...HEA1VY RAINFALL AND DANGEROUS LIGHTNING
WILL ACCOMPANY SOME OF THE STRONGER THUNDERSTORMS.

THE THUNDERSTORMS WERE MOVING TO THE EAST NORTHEAST AT 45 MILES AN
HOUR.
PRZYBYLINSKI

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 29, 2:55 PM ESTSevere Thunderstorm WarningINDBenton, Jasper40 min
Jun 29, 3:07 PM ESTSevere Thunderstorm WarningINDBenton, Warren38 min
Jun 29, 3:45 PM ESTSevere Thunderstorm WarningINDTippecanoe, White40 min
Jun 29, 4:23 PM ESTSevere Thunderstorm WarningINDCass32 min
Jun 29, 4:50 PM ESTTornado WarningINDHoward35 min
Jun 29, 5:27 PM ESTSevere Thunderstorm WarningINDMontgomery33 min
Jun 29, 6:08 PM ESTSevere Thunderstorm WarningINDDelaware22 min
Jun 29, 6:18 PM ESTSevere Thunderstorm WarningINDPutnam42 min
Jun 29, 6:29 PM ESTSevere Thunderstorm WarningINDHendricks31 min
Jun 29, 6:42 PM ESTTornado WarningINDHendricks, Marion38 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.