Alert archive / Illinois / Tornado Warnings in 2000

Tornado Warning 42, NWS St. Louis, MO

July 18, 2000Jersey County, Madison County, Illinois; Saint Charles County, Missouri

NWS St. Louis, MO issued this tornado warning at Jul 18, 2000, 7:26 PM CDT for Jersey County, Madison County, Illinois; Saint Charles County, Missouri. It was in force for 49 min. 1 report came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: Jul 18, 2000, 7:26 PM CDT (00:26 UTC)
Expired: Jul 18, 2000, 8:15 PM CDT
In force: 49 min
Issued by: NWS St. Louis, MO
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Jersey County, IL, Madison County, IL, Saint Charles County, MO

What was reported inside it

Time	Report	Where	Remark
Jul 18, 7:30 PM CDT	Tornado F0	Elsah, IL	Storm spotters reported a brief tornado which only damaged a few trees.

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 18, 6:45 PM CDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 0.4 hours before the alert went out and 197 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1033 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 256 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.

000 
WFUS53 KLSX 190027
TORSTL
ILC083-119-MOC183-189-190115-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
726 PM CDT TUE JUL 18 2000

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI
  NORTHEASTERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI
  WESTERN MADISON COUNTY IN SOUTHWEST ILLINOIS
  SOUTHEASTERN JERSEY COUNTY IN WEST CENTRAL ILLINOIS

* UNTIL 815 PM CDT

* AT 726 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  A TORNADO 3 MILES NORTHWEST OF GRAFTON...MOVING SOUTHEAST AT 25 
  MPH.

* LOCATIONS IN THE PATH...
  ELSAH
  PORTAGE DES SIOUX
  WEST ALTON
  ALTON
  HARTFORD
  WOOD RIVER
  ROXANA

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 INTERISOR 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 3908 9043 3890 9050 3868 9007 3892 8991

FG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 7:29 PM CDT	Tornado Warning	LSX	Calhoun	46 min
Jul 18, 8:04 PM CDT	Tornado Warning	LSX	Macoupin	41 min
Jul 18, 8:54 PM CDT	Severe Thunderstorm Warning	LSX	Bond	51 min
Jul 18, 9:29 PM CDT	Severe Thunderstorm Warning	LSX	Saint Clair	46 min
Jul 18, 9:33 PM CDT	Severe Thunderstorm Warning	LSX	Fayette	42 min
Jul 18, 7:26 PM CDT	Tornado Warning	LSX	Saint Louis	49 min
Jul 18, 7:51 PM CDT	Tornado Warning	LSX	Montgomery	39 min
Jul 18, 8:17 PM CDT	Tornado Warning	LSX	Saint Charles, Saint Louis	43 min
Jul 18, 8:33 PM CDT	Tornado Warning	LSX	Montgomery, Warren	42 min

Nearby

Tornado Warnings in Illinois, 2000 Tornado Warnings in Missouri, 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.