Alert archive / Illinois / Tornado Warnings in 2004

Tornado Warning 4, NWS Lincoln, IL

April 20, 2004Knox County, Stark County, Illinois

NWS Lincoln, IL issued this tornado warning at Apr 20, 2004, 5:49 PM CDT for Knox County, Stark County, Illinois. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 20, 2004, 5:49 PM CDT (22:49 UTC)
Expired: Apr 20, 2004, 6:30 PM CDT
In force: 41 min
Issued by: NWS Lincoln, IL
Area: Counties, with a storm outline in the text

Counties Knox County, IL, Stark County, IL

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 20, 5:40 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 10.8 hours before the alert went out and 77 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: 1073 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 118 m²/s²
0-3 km storm-relative helicity: 192 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 KILX 202249
TORILX
ILC095-175-202330-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
549 PM CDT TUE APR 20 2004

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* TORNADO WARNING FOR...
  STARK COUNTY IN NORTH CENTRAL ILLINOIS
  KNOX COUNTY IN WEST CENTRAL ILLINOIS

* UNTIL 630 PM CDT

* AT 549 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH STRONG
  ROTATION OVER VICTORIA...OR ABOUT 14 MILES SOUTHWEST OF KEWANEE...
  MOVING NORTHEAST AT 30 MPH. THIS STORM COULD PRODUCE A TORNADO AT
  ANY TIME. IN ADDITION TO THE THREAT OF A TORNADO...LARGE HAIL AND
  DAMAGING WINDS CAN BE EXPECTED WITH THIS STORM. GO TO A SAFE PLACE
  NOW

* THE TORNADO IS EXPECTED TO BE NEAR...
  LA FAYETTE
  TOULON
  ELMIRA
  OSCEOLA
  CASTLETON
  LOMBARDVILLE
  BRADFORD

IF YOU ARE IN THE PATH OF THIS STORM...TAKE COVER IN A BASEMENT OR
INTERIOR ROOM ON THE LOWEST FLOOR. VEHICLES AND MOBILE HOMES SHOULD
BE ABANDONED FOR A SAFER SHELTER.

REPORT SEVERE WEATHER OR ANY STORM DAMAGE TO YOUR LOCAL ESDA...OR THE
NEAREST LAW ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER
SERVICE. STAY TUNED FOR LATER STATEMENTS.

LAT...LON 4111 8965 4110 8975 4106 8987 4100 9008
          4115 9019 4115 8988 4123 8988 4123 8965

$$

BAK

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 20, 2:30 PM CDT	Tornado Warning	ILX	Champaign	45 min
Apr 20, 4:42 PM CDT	Severe Thunderstorm Warning	ILX	Mason	63 min
Apr 20, 5:11 PM CDT	Tornado Warning	ILX	Marshall	64 min
Apr 20, 5:14 PM CDT	Severe Thunderstorm Warning	ILX	Tazewell	61 min
Apr 20, 5:27 PM CDT	Tornado Warning	ILX	Tazewell	63 min
Apr 20, 5:51 PM CDT	Tornado Warning	ILX	Marshall	9 min
Apr 20, 5:55 PM CDT	Severe Thunderstorm Warning	ILX	McLean	35 min
Apr 20, 5:55 PM CDT	Tornado Warning	ILX	Marshall	35 min
Apr 20, 6:05 PM CDT	Tornado Warning	ILX	Woodford	55 min

Nearby

Tornado Warnings in Illinois, 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; the sounding from the Mesonet's radiosonde archive.