Alert archive / Illinois / Tornado Warnings in 2004

Tornado Warning 92, NWS Lincoln, IL

August 17, 2004Knox County, Stark County, Illinois

NWS Lincoln, IL issued this tornado warning at Aug 17, 2004, 5:54 PM CDT for Knox County, Stark County, Illinois. It was in force for 66 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: Aug 17, 2004, 5:54 PM CDT (22:54 UTC)
Expired: Aug 17, 2004, 7:00 PM CDT
In force: 66 min
Issued by: NWS Lincoln, IL
Area: Counties, with a storm outline in the text

Counties Knox County, IL, Stark County, IL

The radar

The Quad Cities radar (KDVN), 69 km from the middle of the area, began a volume at 22:54 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

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

Issued	Product	Office	Lasted
Aug 17, 1:20 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 10.9 hours before the alert went out and 66 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: 604 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 823 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 158 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 172254
TORILX
ILC095-175-180000-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
554 PM CDT TUE AUG 17 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 700 PM CDT

* AT 554 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH STRONG
  ROTATION OVER ONEIDA...OR ABOUT 13 MILES NORTHEAST OF GALESBURG...
  MOVING EAST AT 20 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...
  VICTORIA
  LA FAYETTE
  WEST JERSEY
  TOULON
  ELMIRA
  OSCEOLA
  WYOMING

OTHER LOCATIONS IN THIS WARNING INCLUDE...ALTONA AND CASTLETON.

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 4120 9027 4103 9032 4099 8970 4124 8968

$$

NNNN

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 17, 6:51 PM CDT	Severe Thunderstorm Warning	ILX	Marshall, Peoria, Woodford	54 min
Aug 17, 6:59 PM CDT	Severe Thunderstorm Warning	ILX	Stark	61 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; radar from the NEXRAD Level II archive.