Alert archive / Indiana / Tornado Warnings in 2004

Tornado Warning 3, NWS Northern Indiana

April 20, 2004Grant County, Indiana

NWS Northern Indiana issued this tornado warning at Apr 20, 2004, 7:07 PM EST for Grant County, Indiana. It was in force for 53 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, 7:07 PM EST (00:07 UTC)
Expired: Apr 20, 2004, 8:00 PM EST
In force: 53 min
Issued by: NWS Northern Indiana
Area: Counties, with a storm outline in the text

County Grant County, IN

What was reported inside it

Time	Report	Where	Remark
Apr 20, 7:23 PM EST	HAIL 0.75	Gas City, IN
Apr 20, 7:23 PM EST	HAIL 0.75	Gas City, IN
Apr 20, 7:26 PM EST	TORNADO 0	4 Sse Marion, IN	TORNADO SKIPPED...NOT IN CONTACT WITH GROUND AT ALL TIMES. TRACK FROM 2 MILES WEST OF FAIRMONT TO UPLAND. POWER LINES BLOWN DOWN NEAR UPLAND.
Apr 20, 7:26 PM EST	TORNADO	2 W Fairmount, IN
Apr 20, 7:31 PM EST	TORNADO 0	12 Sw Marion, IN	BRIEF TOUCHDOWN OBSERVED IN A FIELD NEAR POINT ISABEL. NO DAMAGE.
Apr 20, 7:31 PM EST	TORNADO	10 W Fowlerton, IN	TORNADO REPORTED ON THE GROUND AT POINT ISABEL

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

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 0.1 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: 333 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1050 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 181 m²/s²
0-3 km storm-relative helicity: 369 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 5.0

Open this sounding in Storm Lab

The text

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

240 
WFUS53 KIWX 210007
TORIWX
INC053-210100-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTHERN INDIANA
707 PM EST TUE APR 20 2004

THE NATIONAL WEATHER SERVICE IN NORTHERN INDIANA HAS ISSUED A

* TORNADO WARNING FOR...
  GRANT COUNTY IN INDIANA

* UNTIL 800 PM EST

* AT 707 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION 14 MILES SOUTHWEST OF
  SWAYZEE...MOVING NORTHEAST AT 30 MPH.

* SOME LOCATIONS IN THE PATH OF THIS STORM ARE...
  POINT ISABEL
  SWAYZEE
  FAIRMOUNT
  JONESBORO
  SWEETSER
  GAS CITY
  MARION

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. IF NO
BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM ON THE
LOWEST FLOOR AWAY FROM WINDOWS.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN NORTHERN INDIANA.

LAT...LON 4040 8561 4040 8586 4053 8586 4064 8572
          4066 8546 4051 8546

The office that day

Everything else NWS Northern Indiana issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 20, 7:04 PM EST	Tornado Warning	IWX	Huntington	56 min
Apr 20, 7:27 PM EST	Severe Thunderstorm Warning	IWX	Cass	48 min
Apr 20, 7:42 PM EST	Tornado Warning	IWX	Allen	78 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.