Alert archive / Illinois / Tornado Warnings in 2003

Tornado Warning 21, NWS Chicago, IL

May 30, 2003Livingston County, Illinois

NWS Chicago, IL issued this tornado warning at May 30, 2003, 7:43 PM CDT for Livingston County, Illinois. It was in force for 32 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: May 30, 2003, 7:43 PM CDT (00:43 UTC)
Expired: May 30, 2003, 8:15 PM CDT
In force: 32 min
Issued by: NWS Chicago, IL
Area: Counties, with a storm outline in the text

County Livingston County, IL

The radar

The Chicago radar (KLOT), 77 km from the middle of the area, began a volume at 00:43 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
May 30, 7:30 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 0.7 hours before the alert went out and 97 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: 142 J/kg
Mixed-layer CIN: -148 J/kg
Mixed-layer LCL: 1329 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 190 m²/s²
0-3 km storm-relative helicity: 219 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

509 
WFUS53 KLOT 310043
TORLOT
ILC105-310115-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHICAGO IL
741 PM CDT FRI MAY 30 2003

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A

* TORNADO WARNING FOR...
  LIVINGSTON COUNTY IN CENTRAL ILLINOIS

* UNTIL 815 PM CDT

* AT 741 PM CDT...DOPPLER RADAR INDICATED STRONG ROTATION IN A SEVERE
  THUNDERSTORM NEAR 8 MILES NORTHWEST OF LONG POINT...OR ABOUT 7
  MILES WEST OF STREATOR...MOVING SOUTHEAST AT 40 MPH.

* THE STORM WILL BE NEAR...
  STREATOR AROUND 750 PM CDT 
  CORNELL AROUND 755 PM CDT
  ODELL AROUND 800 PM CDT.
  


LAT...LON 4105 8832 4083 8846 4100 8893 4111 8893
          4111 8861
$$

FISHER

NNNN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 7:14 PM CDT	Tornado Warning	LOT	LaSalle	31 min
May 30, 7:28 PM CDT	Tornado Warning	LOT	Kendall, LaSalle	47 min
May 30, 7:37 PM CDT	Severe Thunderstorm Warning	LOT	Cook, Lake	53 min
May 30, 7:45 PM CDT	Special Marine Warning	LOT		90 min
May 30, 7:45 PM CDT	Special Marine Warning	LOT		90 min
May 30, 7:45 PM CDT	Special Marine Warning	LOT		90 min
May 30, 7:45 PM CDT	Special Marine Warning	LOT		90 min
May 30, 7:49 PM CDT	Tornado Warning	LOT	LaSalle	11 min
May 30, 7:53 PM CDT	Tornado Warning	LOT	Will	52 min
May 30, 8:11 PM CDT	Special Marine Warning	LOT		2 hr
May 30, 8:11 PM CDT	Special Marine Warning	LOT		2 hr
May 30, 8:11 PM CDT	Special Marine Warning	LOT		2 hr
May 30, 8:19 PM CDT	Tornado Warning	LOT	Ford, Iroquois, Livingston	26 min
May 30, 8:25 PM CDT	Tornado Warning	LOT	Cook	50 min
May 30, 8:30 PM CDT	Tornado Warning	LOT	Ford, Iroquois, Livingston	15 min
May 30, 8:40 PM CDT	Tornado Warning	LOT	Kankakee, Will	35 min
May 30, 8:45 PM CDT	Tornado Warning	LOT	Ford, Livingston	30 min
May 30, 8:48 PM CDT	Tornado Warning	LOT	Iroquois	27 min
May 30, 9:14 PM CDT	Tornado Warning	LOT	Ford	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.