Alert archive / Illinois / Tornado Warnings in 1998

Tornado Warning 1, NWS Lincoln, IL

March 27, 1998Sangamon County, Illinois

NWS Lincoln, IL issued this tornado warning at Mar 27, 1998, 6:45 PM CST for Sangamon County, Illinois. It was in force for 30 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
Mar 27, 1998, 6:45 PM CST (00:45 UTC)
Expired
Mar 27, 1998, 7:15 PM CST
In force
30 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 00:49 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.

IssuedProductOfficeLasted
Mar 27, 6:15 PM CSTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 0.8 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-pSkew-T log-p diagram, Lincoln, IL at 00:00Z on 1998-03-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 1998-03-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 223 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1945 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
223 m²/s²
0-3 km storm-relative helicity
290 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.

631 
WFUS1 KSPI 280046 RRA
TORSPI
ILC167-280115-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
645 PM CST FRI MAR 27 1998

* TORNADO WARNING FOR
  SANGAMON COUNTY IN CENTRAL ILLINOIS

* UNTIL 715 PM CST

* SOME LOCATIONS AFFECTED
  SPRINGFIELD
  ROCHESTER

* AT 643 PM CST SANGAMON COUNTY ESDA REPORTED A TORNADO BETWEEN NEW
BERLIN AND CHATHAM...MOVING NORTHEAST AT 50 MPH.

TAKE COVER IMMEDIATELY IN A BASEMENT OR INTERIOR ROOM ON THE LOWEST
FLOOR. ABANDON MOBILE HOMES AND VEHICLES FOR SAFER SHELTER.

FRIEDERS


&

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 27, 6:02 PM CSTSevere Thunderstorm WarningILXMorgan28 min
Mar 27, 6:10 PM CSTSevere Thunderstorm WarningILXMason, Menard, Sangamon35 min
Mar 27, 6:10 PM CSTSevere Thunderstorm WarningILXFulton35 min
Mar 27, 6:35 PM CSTSevere Thunderstorm WarningILXLogan, Tazewell40 min
Mar 27, 6:35 PM CSTSevere Thunderstorm WarningILXKnox, Peoria40 min
Mar 27, 6:50 PM CSTSevere Thunderstorm WarningILXChristian, Macon, Shelby55 min
Mar 27, 7:01 PM CSTSevere Thunderstorm WarningILXMarshall, Woodford59 min
Mar 27, 7:01 PM CSTSevere Thunderstorm WarningILXStark59 min
Mar 27, 7:01 PM CSTSevere Thunderstorm WarningILXDeWitt, McLean59 min
Mar 27, 7:24 PM CSTSevere Thunderstorm WarningILXMoultrie, Piatt36 min
Mar 28, 12:39 AM CSTSevere Thunderstorm WarningILXJasper36 min
Mar 28, 4:03 AM CSTSevere Thunderstorm WarningILXShelby57 min
Mar 28, 5:39 AM CSTTornado WarningILXColes36 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.