Alert archive / Indiana / Tornado Warnings in 1998

Tornado Warning 2, NWS Indianapolis, IN

April 7, 1998Hendricks County, Marion County, Indiana

NWS Indianapolis, IN issued this tornado warning at Apr 7, 1998, 7:33 PM EST for Hendricks County, Marion County, Indiana. It was in force for 42 min. 3 reports 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: Apr 7, 1998, 7:33 PM EST (00:33 UTC)
Expired: Apr 7, 1998, 8:15 PM EST
In force: 42 min
Issued by: NWS Indianapolis, IN
Area: Whole counties

Counties Hendricks County, IN, Marion County, IN

What was reported inside it

Time	Report	Where
Apr 7, 7:37 PM EST	Hail 1.75	Plainfield, IN
Apr 7, 7:57 PM EST	Hail 0.75	Clermont, IN
Apr 7, 8:00 PM EST	Hail 1	Avon, 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 7, 7:00 PM EST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 0.6 hours before the alert went out and 198 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: 756 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 671 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 75 m²/s²
0-3 km storm-relative helicity: 185 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.3

Open this sounding in Storm Lab

The text

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

771 
WFUS1 KIND 080034 RRA
TORIND
INC063-097-080115-
 
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
733 PM EST TUE APR 7 1998
 
THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  815 PM EST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN CENTRAL INDIANA
 
   ...EASTERN HENDRICKS COUNTY...MARION COUNTY
 
AT 734 PM A TELEVISION METEOROLOGIST REPORTED A POSSIBLE TORNADO JUST
WEST OF PLAINFIELD MOVING NORTHEAST AT 25 MPH. THIS STORM WILL MOVE
THROUGH PLAINFIELD BY 745 PM AND THEN INTO WESTERN MARION COUNTY NEAR
BRIDGEPORT BY 800 PM. THE INDIANAPOLIS METROPOLITAN AREA IS IN THE PATH
OF THIS STORM.
 
THIS STORM PRODUCED GOLFBALL SIZE HAIL IN BELLEVILLE AT 720 PM.
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM
SUCH AS A CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY.  AVOID WINDOWS.
 
LASHLEY
 
&

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 7, 8:12 PM EST	Severe Thunderstorm Warning	IND	Marion	33 min
Apr 7, 8:16 PM EST	Tornado Warning	IND	Parke, Vermillion	59 min
Apr 7, 8:34 PM EST	Severe Thunderstorm Warning	IND	Hamilton, Hancock, Madison	26 min
Apr 7, 9:10 PM EST	Tornado Warning	IND	Fountain, Parke	50 min
Apr 7, 9:26 PM EST	Tornado Warning	IND	Montgomery	49 min
Apr 7, 10:02 PM EST	Tornado Warning	IND	Boone	58 min
Apr 7, 10:14 PM EST	Tornado Warning	IND	Montgomery	46 min
Apr 8, 12:11 AM EST	Severe Thunderstorm Warning	IND	Marion	34 min
Apr 8, 12:18 AM EST	Severe Thunderstorm Warning	IND	Johnson	27 min
Apr 8, 6:45 PM EST	Severe Thunderstorm Warning	IND	Jackson	30 min

Nearby

Tornado Warnings in Indiana, 1998 Every tornado warning in 1998 Tornadoes in 1998

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.