Alert archive / Illinois / Tornado Warnings in 1998

Tornado Warning 78, NWS Lincoln, IL

June 11, 1998Sangamon County, Illinois

NWS Lincoln, IL issued this tornado warning at Jun 11, 1998, 3:46 PM CDT for Sangamon County, Illinois. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 11, 1998, 3:46 PM CDT (20:46 UTC)
Expired: Jun 11, 1998, 4:30 PM CDT
In force: 44 min
Issued by: NWS Lincoln, IL
Area: Whole counties

County Sangamon County, IL

The radar

The Lincoln radar (KILX), 52 km from the middle of the area, began a volume at 20:47 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
Jun 11, 2:30 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 8.8 hours before the alert went out and 100 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: 6598 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 34 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.

266 
WFUS1 KSPI 112047 RRA
TORSPI
ILC167-112130-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
346 PM CDT THU JUN 11 1998

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* TORNADO WARNING FOR
  EASTERN SANGAMON COUNTY IN CENTRAL ILLINOIS

* UNTIL 430 PM CDT

* AT 344 PM CDT LINCOLN DOPPLER RADAR INDICATED A POSSIBLE TORNADO
  IN A LINE OF SEVERE THUNDERSTORMS EXTENDING FROM NEAR BUFFALO TO
  ROCHESTER TO WEST OF DIVERNON...MOVING NORTHEAST AT 40 MPH.

* THESE STORMS ARE EXPECTED TO AFFECT AREAS AROUND...
  DIVERNON
  ROCHESTER
  BUFFALO
  MECHANICSBURG
  ILLIOPOLIS

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.

BYRD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 2:58 PM CDT	Tornado Warning	ILX	Morgan, Sangamon	47 min
Jun 11, 3:42 PM CDT	Severe Thunderstorm Warning	ILX	Tazewell	48 min
Jun 11, 3:55 PM CDT	Tornado Warning	ILX	Knox, Stark	35 min
Jun 11, 4:04 PM CDT	Severe Thunderstorm Warning	ILX	Woodford	41 min
Jun 11, 4:11 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Macon	49 min
Jun 11, 4:36 PM CDT	Severe Thunderstorm Warning	ILX	Moultrie, Piatt	54 min
Jun 11, 4:36 PM CDT	Severe Thunderstorm Warning	ILX	Shelby	54 min
Jun 11, 4:49 PM CDT	Severe Thunderstorm Warning	ILX	Champaign	56 min
Jun 11, 5:13 PM CDT	Tornado Warning	ILX	Moultrie, Shelby	47 min
Jun 11, 5:25 PM CDT	Severe Thunderstorm Warning	ILX	Vermilion	35 min
Jun 11, 6:02 PM CDT	Severe Thunderstorm Warning	ILX	Richland	43 min

Nearby

Tornado Warnings in Illinois, 1998 Every tornado warning in 1998 Tornadoes in 1998

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.