Alert archive / Illinois / Tornado Warnings in 1998

Tornado Warning 77, NWS Lincoln, IL

June 11, 1998Morgan County, Sangamon County, Illinois

NWS Lincoln, IL issued this tornado warning at Jun 11, 1998, 2:58 PM CDT for Morgan County, Sangamon County, Illinois. It was in force for 47 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 11, 1998, 2:58 PM CDT (19:58 UTC)
Expired: Jun 11, 1998, 3:45 PM CDT
In force: 47 min
Issued by: NWS Lincoln, IL
Area: Whole counties

Counties Morgan County, IL, Sangamon County, IL

The radar

The Lincoln radar (KILX), 68 km from the middle of the area, began a volume at 20:01 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.

What was reported inside it

Time	Report	Where	Remark
Jun 11, 3:00 PM CDT	Thunderstorm Wind 61	Pleasant Plains, IL	Thunderstorm winds blew down several trees in Pleasant Plains and in Chatham. In Chatham, a tree fell onto a van and truck causing minor damage. No injuries were reported and no damage estimate was available.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

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, 8.0 hours before the alert went out and 122 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.

965 
WFUS1 KSPI 111959 RRA
TORSPI
ILC137-167-112045-

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

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* TORNADO WARNING FOR
  MORGAN COUNTY IN CENTRAL ILLINOIS
  SANGAMON COUNTY IN CENTRAL ILLINOIS

* UNTIL 345 PM CDT

* AT 257 PM CDT LINCOLN DOPPLER RADAR INDICATED A POSSIBLE TORNADO 8
  MILES SOUTH SOUTHEAST OF JACKSONVILLE...MOVING NORTHEAST AT 40 MPH.

* THIS STORM IS EXPECTED TO AFFECT AREAS AROUND...
  WAVERLY
  CHATHAM
  NEW BERLIN
  SPRINGFIELD
  FRANKLIN
  LOAMI

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/GOETSCH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 3:42 PM CDT	Severe Thunderstorm Warning	ILX	Tazewell	48 min
Jun 11, 3:46 PM CDT	Tornado Warning	ILX	Sangamon	44 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.