Alert archive / Illinois / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 49, NWS Lincoln, IL

May 15, 1998Tazewell County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at May 15, 1998, 9:20 PM CDT for Tazewell County, Illinois. It was in force for 40 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: May 15, 1998, 9:20 PM CDT (02:20 UTC)
Expired: May 15, 1998, 10:00 PM CDT
In force: 40 min
Issued by: NWS Lincoln, IL
Area: Whole counties

County Tazewell County, IL

The radar

The Lincoln radar (KILX), 42 km from the middle of the area, began a volume at 02:22 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 15, 4:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 2.3 hours before the alert went out and 87 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: 3559 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 821 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 183 m²/s²
0-3 km storm-relative helicity: 254 m²/s²
Significant tornado parameter: 3.7
Supercell composite: 20.9

Open this sounding in Storm Lab

The text

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

652 
WUUS1 KSPI 160219 RRA
SVRSPI
ILC179-160300-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
920 PM CDT FRI MAY 15 1998

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR
  TAZEWELL COUNTY IN CENTRAL ILLINOIS

* UNTIL 1000 PM CDT

* AT 916 PM CDT LINCOLN DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS EXTENDING FROM FROM MORTON TO 23 MILES SOUTH OF
  PEORIA NEAR DELAVAN...MOVING NORTHEAST AT 45 MPH.

* THIS STORM IS EXPECTED TO AFFECT AREAS AROUND...
  DELAVAN
  MINIER
  TREMONT
  MACKINAW

DAMAGING WIND GUSTS OF 60 MPH OR HIGHER WILL ACCOMPANY THIS STORM.
MOVE TO A STURDY BUILDING AND STAY AWAY FROM WINDOWS.

REMEMBER...SEVERE THUNDERSTORMS MAY PRODUCE TORNADOES AT ANY TIME.

GEELHART

The office that day

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

Issued	Product	Office	Counties	Lasted
May 15, 7:05 PM CDT	Severe Thunderstorm Warning	ILX	Schuyler	40 min
May 15, 7:24 PM CDT	Severe Thunderstorm Warning	ILX	Fulton, Knox	36 min
May 15, 7:58 PM CDT	Severe Thunderstorm Warning	ILX	Fulton	47 min
May 15, 8:28 PM CDT	Severe Thunderstorm Warning	ILX	Peoria	47 min
May 15, 8:48 PM CDT	Severe Thunderstorm Warning	ILX	Mason	42 min
May 15, 9:06 PM CDT	Severe Thunderstorm Warning	ILX	Marshall, Woodford	39 min
May 15, 10:06 PM CDT	Severe Thunderstorm Warning	ILX	McLean	39 min
May 15, 10:09 PM CDT	Severe Thunderstorm Warning	ILX	Logan	51 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1998 Every severe thunderstorm warning 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.