Alert archive / Indiana / Tornado Warnings in 1999

Tornado Warning 2, NWS Wilmington, OH

April 9, 1999Dearborn County, Indiana

NWS Wilmington, OH issued this tornado warning at Apr 9, 1999, 4:26 AM EDT for Dearborn County, Indiana. It was in force for 34 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
Apr 9, 1999, 4:26 AM EDT (08:26 UTC)
Expired
Apr 9, 1999, 5:00 AM EDT
In force
34 min
Issued by
NWS Wilmington, OH
Area
Whole counties

County Dearborn County, IN

What was reported inside it

TimeReportWhereRemark
Apr 9, 4:44 AM EDTTornado F0Aurora, INA small barn was totally destroyed, a 40 foot silo was damaged and several trees were downed. Four homes were heavily damaged in rural Dillsboro.

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.

IssuedProductOfficeLasted
Apr 9, 12:30 AM EDTTornado WatchSPC5 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 8.4 hours before the alert went out and 106 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, Cncnati-Daytn, OH at 00:00Z on 1999-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 250 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, Cncnati-Daytn, OH at 00:00Z on 1999-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 square meters per square second.1939587897117Sfc1 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
250 J/kg
Mixed-layer CIN
-130 J/kg
Mixed-layer LCL
1483 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
166 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

999 
WFUS01 KILN 090828 RRA
TORILN
INC029-090900-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
426 AM EDT FRI APR 9 1999

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A

* TORNADO WARNING FOR...
  DEARBORN COUNTY IN SOUTHEASTERN INDIANA.

* UNTIL 500 AM EDT

* AT 421 AM EDT... WEATHER SPOTTERS INDICATED A TORNADO 17 MILES
  WEST OF LAWRENCEBURG... MOVING EAST AT 35 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  DILLSBORO AT 428 AM EDT .
  AURORA AT 444 AM EDT .
  LAWRENCEBURG AT 450 AM EDT .

A TORNADO WAS REPORTED BY SKYWARN SPOTTERS SOUTH OF REXVILLE IN
SOUTHERN RIPLEY COUNTY.

GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR

.END/TIPTON


&

The office that day

Everything else NWS Wilmington, OH issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 9, 4:02 AM EDTTornado WarningILNRipley48 min

Nearby

Tornado Warnings in Indiana, 1999Every tornado warning in 1999Tornadoes in 1999

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.