Alert archive / Indiana / Tornado Warnings in 2004

Tornado Warning 3, NWS Indianapolis, IN

April 20, 2004Boone County, Indiana

NWS Indianapolis, IN issued this tornado warning at Apr 20, 2004, 5:38 PM EST for Boone County, Indiana. It was in force for 52 min. 6 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 20, 2004, 5:38 PM EST (22:38 UTC)
Expired: Apr 20, 2004, 6:30 PM EST
In force: 52 min
Issued by: NWS Indianapolis, IN
Area: Counties, with a storm outline in the text

County Boone County, IN

What was reported inside it

Time	Report	Where	Remark
Apr 20, 5:44 PM EST	TORNADO	Lebanon, IN
Apr 20, 5:44 PM EST	TORNADO	Lebanon, IN
Apr 20, 5:55 PM EST	TORNADO	5 Sw Lebanon, IN
Apr 20, 5:55 PM EST	TORNADO	5 Sw Lebanon, IN
Apr 20, 6:05 PM EST	TORNADO	Lebanon, IN	* 1 INJ * SEVERAL VEHICLES OVERTURNED ON INTERSTATE 74 NEAR MILE MARKERS 53 AND 54.
Apr 20, 6:05 PM EST	TORNADO	Lebanon, IN	* 1 INJ * SEVERAL VEHICLES OVERTURNED ON INTERSTATE 74 NEAR MILE MARKERS 53 AND 54.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.6 hours before the alert went out and 177 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1297 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 169 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 
WFUS53 KIND 202238
TORIND
INC011-202330-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
538 PM EST TUE APR 20 2004

THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A

* TORNADO WARNING FOR...
  BOONE COUNTY IN CENTRAL INDIANA

* UNTIL 630 PM EST

* AT 533 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR ADVANCE...
  OR ABOUT 13 MILES SOUTHEAST OF CRAWFORDSVILLE...MOVING NORTHEAST AT
  20 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  ADVANCE AROUND 545 PM EST
  THORNTOWN AROUND 605 PM EST
  ULEN AROUND 610 PM EST

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EST TUESDAY EVENING
FOR NORTHWESTERN INDIANA.

LAT...LON 4017 8669 3993 8670 3996 8627 4018 8628

$$

DRT

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 4:55 PM EST	Severe Thunderstorm Warning	IND	Putnam	35 min
Apr 20, 5:22 PM EST	Tornado Warning	IND	Clinton	23 min
Apr 20, 5:31 PM EST	Severe Thunderstorm Warning	IND	Boone	44 min
Apr 20, 5:38 PM EST	Tornado Warning	IND	Howard, Tipton	37 min
Apr 20, 6:19 PM EST	Tornado Warning	IND	Hamilton, Tipton	56 min
Apr 20, 6:36 PM EST	Severe Thunderstorm Warning	IND	Tippecanoe	39 min

Nearby

Tornado Warnings in Indiana, 2004 Every tornado warning in 2004 Tornadoes in 2004

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.