Alert archive / Illinois / Tornado Warnings in 2000

Tornado Warning 14, NWS St. Louis, MO

April 20, 2000Macoupin County, Illinois

NWS St. Louis, MO issued this tornado warning at Apr 20, 2000, 8:02 AM CDT for Macoupin County, Illinois. It was in force for 43 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 20, 2000, 8:02 AM CDT (13:02 UTC)
Expired: Apr 20, 2000, 8:45 AM CDT
In force: 43 min
Issued by: NWS St. Louis, MO
Area: Whole counties

County Macoupin County, IL

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 20, 4:15 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 1.0 hours before the alert went out and 150 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: 595 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 873 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 167 m²/s²
0-3 km storm-relative helicity: 147 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KLSX 201303
TORSTL
ILC117-201345-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
802 AM CDT THU APR 20 2000

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  MACOUPIN COUNTY IN SOUTHWESTERN ILLINOIS

* UNTIL 845 AM CDT

* AT 800 AM CDT... AREA LAW ENFORCEMENT INDICATED A TORNADO JUST
  NORTH OF SHIPMAN... MOVING NORTHEAST 40 MPH.

* LOCATIONS IN THE PATH...
  PLAINVIEW
  CARLINVILLE

IF YOU ARE IN THE PATH OF THIS STORM...SEEK SHELTER NOW! A
BASEMENT OFFERS THE BEST PROTECTION. IF 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

MB/RP


&

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 8:47 PM CDT	Severe Thunderstorm Warning	LSX	Pike	33 min
Apr 19, 8:57 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun	33 min
Apr 20, 3:46 AM CDT	Severe Thunderstorm Warning	LSX	Adams	49 min
Apr 20, 4:29 AM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Pike	51 min
Apr 20, 4:49 AM CDT	Severe Thunderstorm Warning	LSX	Greene, Jersey	46 min
Apr 20, 5:06 AM CDT	Severe Thunderstorm Warning	LSX	Macoupin	49 min
Apr 20, 7:18 AM CDT	Severe Thunderstorm Warning	LSX	Jersey	42 min
Apr 20, 7:29 AM CDT	Severe Thunderstorm Warning	LSX	Greene	46 min
Apr 20, 8:54 AM CDT	Severe Thunderstorm Warning	LSX	Montgomery	51 min
Apr 20, 9:37 AM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Fayette	48 min
Apr 20, 10:27 AM CDT	Severe Thunderstorm Warning	LSX	Fayette	48 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; the sounding from the Mesonet's radiosonde archive.