Alert archive / Illinois / Tornado Warnings in 1998

Tornado Warning 44, NWS Lincoln, IL

April 15, 1998Clay County, Illinois

NWS Lincoln, IL issued this tornado warning at Apr 15, 1998, 8:22 PM CDT for Clay County, Illinois. It was in force for 53 min. 2 reports 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
Apr 15, 1998, 8:22 PM CDT (01:22 UTC)
Expired
Apr 15, 1998, 9:15 PM CDT
In force
53 min
Issued by
NWS Lincoln, IL
Area
Whole counties

County Clay County, IL

What was reported inside it

TimeReportWhereRemark
Apr 15, 8:45 PM CDTTornado F2Flora, IL
Apr 15, 9:00 PM CDTTornado F2Clay City, IL

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.

IssuedProductOfficeLasted
Apr 15, 4:30 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.4 hours before the alert went out and 156 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-pSkew-T log-p diagram, Lincoln, IL at 00:00Z on 1998-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 426 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 1998-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
426 J/kg
Mixed-layer CIN
-49 J/kg
Mixed-layer LCL
919 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
33 m²/s²
0-3 km storm-relative helicity
190 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSPI 160122 RRA
TORSPI
ILC025-160215-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
822 PM CDT WED APR 15 1998

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* TORNADO WARNING FOR
  CLAY COUNTY IN SOUTHEASTERN ILLINOIS

* UNTIL 915 PM CDT

* AT 815 PM CDT LINCOLN DOPPLER RADAR INDICATED A TORNADO 5 MILES
  SOUTHEAST OF SALEM...MOVING NORTHEAST AT 30 MPH.

* THIS STORM IS EXPECTED TO AFFECT AREAS AROUND...
  XENIA<
  FLORA
  CLAY CITY
  LOUISVILLE




TORNADOES ARE ESPECIALLY DANGEROUS AT NIGHT BECAUSE THEY ARE HARD
TO SEE. TAKE COVER IN A BASEMENT OR INTERIOR ROOM ON THE LOWEST
FLOOR.

KETCHAM

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 15, 8:32 PM CDTSevere Thunderstorm WarningILXMcLean43 min
Apr 15, 8:45 PM CDTTornado WarningILXJasper, Richland60 min
Apr 15, 8:53 PM CDTSevere Thunderstorm WarningILXFulton, Knox52 min
Apr 15, 9:24 PM CDTTornado WarningILXCrawford51 min
Apr 15, 9:45 PM CDTSevere Thunderstorm WarningILXKnox45 min
Apr 15, 10:00 PM CDTSevere Thunderstorm WarningILXStark60 min
Apr 15, 11:20 PM CDTSevere Thunderstorm WarningILXMason, Tazewell55 min

Nearby

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