Alert archive / Illinois / Tornado Warnings in 1999

Tornado Warning 9, NWS Lincoln, IL

April 8, 1999Menard County, Illinois

NWS Lincoln, IL issued this tornado warning at Apr 8, 1999, 9:17 PM CDT for Menard County, Illinois. It was in force for 28 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: Apr 8, 1999, 9:17 PM CDT (02:17 UTC)
Expired: Apr 8, 1999, 9:45 PM CDT
In force: 28 min
Issued by: NWS Lincoln, IL
Area: Whole counties

County Menard County, IL

The radar

The Lincoln radar (KILX), 42 km from the middle of the area, began a volume at 02:18 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
Apr 8, 8:00 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 2.3 hours before the alert went out and 103 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: 859 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 1075 m above ground
0-6 km bulk shear: 73 kt
0-1 km storm-relative helicity: 344 m²/s²
0-3 km storm-relative helicity: 449 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 8.7

Open this sounding in Storm Lab

The text

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

999 
WFUS1 KSPI 090216 RRA
TORSPI
ILC129-090245-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
917 PM CDT THU APR 8 1999

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* TORNADO WARNING FOR...
  MENARD COUNTY IN CENTRAL ILLINOIS

* UNTIL 945 PM CDT

* AT 913 PM CDT...A TORNADO WAS LOCATED 10 MILES SOUTHWEST
  OF PETERSBURG...MOVING EAST NORTHEAST AT 50 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  TULLULA
  ATHENS

THIS STORM HAS A HISTORY OF PRODUCING STRUCTURAL DAMAGE

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

FRIEDERS


&

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 8, 7:44 PM CDT	Tornado Warning	ILX	Knox	46 min
Apr 8, 7:47 PM CDT	Tornado Warning	ILX	Scott	28 min
Apr 8, 8:16 PM CDT	Tornado Warning	ILX	Morgan, Scott	44 min
Apr 8, 8:32 PM CDT	Tornado Warning	ILX	Fulton, Knox	28 min
Apr 8, 8:42 PM CDT	Severe Thunderstorm Warning	ILX	Peoria, Stark	48 min
Apr 8, 8:56 PM CDT	Severe Thunderstorm Warning	ILX	Sangamon	64 min
Apr 8, 9:17 PM CDT	Severe Thunderstorm Warning	ILX	Marshall, Woodford	58 min
Apr 8, 9:29 PM CDT	Severe Thunderstorm Warning	ILX	Peoria	31 min
Apr 8, 9:38 PM CDT	Severe Thunderstorm Warning	ILX	Tazewell	37 min
Apr 8, 9:41 PM CDT	Severe Thunderstorm Warning	ILX	Logan	34 min
Apr 8, 9:47 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Macon	58 min
Apr 8, 10:02 PM CDT	Tornado Warning	ILX	Christian	28 min
Apr 8, 10:13 PM CDT	Tornado Warning	ILX	Macon	32 min
Apr 8, 10:28 PM CDT	Severe Thunderstorm Warning	ILX	Shelby	47 min
Apr 8, 10:32 PM CDT	Severe Thunderstorm Warning	ILX	Moultrie, Piatt	28 min
Apr 8, 10:37 PM CDT	Tornado Warning	ILX	Piatt	23 min
Apr 8, 10:47 PM CDT	Tornado Warning	ILX	Champaign	28 min
Apr 8, 10:54 PM CDT	Tornado Warning	ILX	Effingham	36 min
Apr 8, 10:56 PM CDT	Severe Thunderstorm Warning	ILX	Coles, Douglas	34 min
Apr 8, 11:13 PM CDT	Tornado Warning	ILX	Cumberland	32 min
Apr 8, 11:15 PM CDT	Tornado Warning	ILX	Shelby	15 min
Apr 8, 11:17 PM CDT	Tornado Warning	ILX	Champaign, Vermilion	28 min
Apr 8, 11:20 PM CDT	Severe Thunderstorm Warning	ILX	Vermilion	25 min
Apr 8, 11:30 PM CDT	Tornado Warning	ILX	Coles, Edgar	30 min
Apr 8, 11:33 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Effingham, Jasper	42 min
Apr 8, 11:45 PM CDT	Tornado Warning	ILX	Clark, Cumberland	30 min
Apr 8, 11:48 PM CDT	Severe Thunderstorm Warning	ILX	Vermilion	27 min
Apr 8, 11:52 PM CDT	Tornado Warning	ILX	Edgar	38 min
Apr 9, 12:00 AM CDT	Severe Thunderstorm Warning	ILX	Crawford	30 min
Apr 9, 12:26 AM CDT	Severe Thunderstorm Warning	ILX	Crawford	19 min

Nearby

Tornado Warnings in Illinois, 1999 Every tornado warning in 1999 Tornadoes in 1999

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.