Alert archive / Illinois / Tornado Warnings in 2003

Tornado Warning 7, NWS Lincoln, IL

April 30, 2003Knox County, Illinois

NWS Lincoln, IL issued this tornado warning at Apr 30, 2003, 8:17 PM CDT for Knox County, Illinois. It was in force for 58 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 30, 2003, 8:17 PM CDT (01:17 UTC)
Expired: Apr 30, 2003, 9:15 PM CDT
In force: 58 min
Issued by: NWS Lincoln, IL
Area: Counties, with a storm outline in the text

County Knox County, IL

The radar

The Quad Cities radar (KDVN), 64 km from the middle of the area, began a volume at 01:20 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
Apr 30, 5:50 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 1.3 hours before the alert went out and 62 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: 1022 J/kg
Mixed-layer CIN: -104 J/kg
Mixed-layer LCL: 839 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 457 m²/s²
0-3 km storm-relative helicity: 611 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 12.6

Open this sounding in Storm Lab

The text

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

723 
WFUS53 KILX 010117
TORILX
ILC095-010215-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
816 PM CDT WED APR 30 2003

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

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

* UNTIL 915 PM CDT

* AT 816 PM CDT...RADAR INDICATED A DEVELOPING TORNADO OVER ONEIDA...
  OR ABOUT 13 MILES NORTHEAST OF GALESBURG...MOVING EAST AT 25 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
RURAL KNOX COUNTY
ONEIDA
ONTARIO
VICTORIA
ALTONA

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.

TORNADOES ARE ESPECIALLY DANGEROUS AT NIGHT BECAUSE THEY ARE HARD TO
SEE. DO NOT REMAIN IN YOUR CAR OR MOBILE HOME. INSTEAD...TAKE COVER
IN A REINFORCED BUILDING. GO TO A BASEMENT OR INTERIOR ROOM ON THE
LOWEST FLOOR.

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 4115 9037 4105 9033 4102 8999 4115 8999

$$

GOETSCH

NNNN

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 7:12 PM CDT	Tornado Warning	ILX	Knox	63 min
Apr 30, 8:35 PM CDT	Tornado Warning	ILX	Stark	55 min
Apr 30, 9:16 PM CDT	Severe Thunderstorm Warning	ILX	Knox	74 min
Apr 30, 9:31 PM CDT	Severe Thunderstorm Warning	ILX	Stark	59 min
Apr 30, 9:44 PM CDT	Flash Flood Warning	ILX	Knox, Stark	6 hr
Apr 30, 9:44 PM CDT	Severe Thunderstorm Warning	ILX	Marshall	61 min
Apr 30, 10:31 PM CDT	Severe Thunderstorm Warning	ILX	Knox	59 min
May 1, 1:17 AM CDT	Flash Flood Warning	ILX	Marshall	6 hr
May 1, 1:44 AM CDT	Tornado Warning	ILX	McLean	31 min

Nearby

Tornado Warnings in Illinois, 2003 Every tornado warning in 2003 Tornadoes in 2003

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.