Alert archive / Illinois / Tornado Warnings in 2000

Tornado Warning 27, NWS St. Louis, MO

June 20, 2000Fayette County, Montgomery County, Illinois

NWS St. Louis, MO issued this tornado warning at Jun 20, 2000, 1:47 PM CDT for Fayette County, Montgomery County, Illinois. It was in force for 43 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 20, 2000, 1:47 PM CDT (18:47 UTC)
Expired: Jun 20, 2000, 2:30 PM CDT
In force: 43 min
Issued by: NWS St. Louis, MO
Area: Whole counties

Counties Fayette County, IL, Montgomery County, IL

What was reported inside it

Time	Report	Where	Remark
Jun 20, 2:40 PM CDT	Tornado F0	Donnellson, IL	A small tornado left an intermittent damage path across southeast Montgomery County. One grain bin was destroyed, otherwise damage was limited to downed trees and some power lines.

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 nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 6.8 hours before the alert went out and 128 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: 135 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 1033 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 216 m²/s²
0-3 km storm-relative helicity: 234 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KLSX 201847
TORSTL
ILC051-135-201930-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
147 PM CDT TUE JUN 20 2000

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN MONTGOMERY COUNTY IN CENTRAL ILLINOIS
  NORTHERN FAYETTE COUNTY IN SOUTH CENTRAL ILLINOIS

* UNTIL 230 PM CDT

* AT 147 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO OVER IRVING...MOVING EAST AT 35 MPH.

* LOCATIONS IN THE PATH...
  RAMSEY
  WRIGHTS CORNER
  WITT
  

IF YOU ARE IN THE PATH OF THIS STORM...SEEK SHELTER NOW! A BASEMENT
OFFERS THE BEST PROTECTION. IF A BASEMENT IS NOT AVAILABLE...MOVE TO
THE LOWEST FLOOR AND SEEK SHELTER IN A SMALL INTERIOR ROOM. STAY AWAY
FROM OUTSIDE WALLS AND WINDOWS. MOBILE HOMES SHOULD BE ABANDONED IN
FAVOR OF A MORE SUBSTANTIAL STRUCTURE. DO NOT TRY TO OUTRUN A TORNADO
IN A VEHICLE.

LAT...LON 3929 8943 3911 A8941 3913 8858 3938 8861

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 20, 1:16 PM CDT	Severe Thunderstorm Warning	LSX	Montgomery	44 min
Jun 20, 2:32 PM CDT	Tornado Warning	LSX	Montgomery	28 min
Jun 20, 2:55 PM CDT	Tornado Warning	LSX	Fayette	50 min
Jun 20, 3:45 PM CDT	Tornado Warning	LSX	Fayette	45 min
Jun 20, 5:58 PM CDT	Severe Thunderstorm Warning	LSX	Pike	62 min
Jun 20, 6:13 PM CDT	Tornado Warning	LSX	Pike	47 min

Nearby

Tornado Warnings in Illinois, 2000 Every tornado warning in 2000 Tornadoes in 2000

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.