Alert archive / Illinois / Tornado Warnings in 2004

Tornado Warning 48, NWS St. Louis, MO

June 18, 2004Monroe County, Saint Clair County, Illinois

NWS St. Louis, MO issued this tornado warning at Jun 18, 2004, 3:19 PM CDT for Monroe County, Saint Clair County, Illinois. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 18, 2004, 3:19 PM CDT (20:19 UTC)
Expired: Jun 18, 2004, 4:00 PM CDT
In force: 41 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

Counties Monroe County, IL, Saint Clair 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
Jun 18, 1:40 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 8.3 hours before the alert went out and 227 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: 979 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: 13 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.

566 
WFUS53 KLSX 182019
TORLSX
ILC133-163-182100-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
319 PM CDT FRI JUN 18 2004

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN MONROE COUNTY IN SOUTHWEST ILLINOIS
  ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS

* UNTIL 400 PM CDT

* AT 319 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION NEAR COLUMBIA. THE STORM
  WAS MOVING EAST AT 10 MPH...AND MAY PRODUCE A TORNADO AT ANY TIME

* LOCATIONS IMPACTED INCLUDE...
  FREEBURG
  SHILOH
  NEW ATHENS
  SCOTT AFB
  MASCOUTAH
  FAYETTEVILLE

IF YOU ARE IN THE PATH OF THIS STORM...SEEK SHELTER NOW MOVE TO A
BASEMENT...UNDERGROUND STORM SHELTER...OR AN INTERIOR ROOM OR HALLWAY
ON THE LOWEST LEVEL OF A STURDY BUILDING.

AVOID WINDOWS DO NOT OPEN WINDOWS...STAY AWAY FROM THEM...OPENING
WINDOWS DOES NOT MINIMIZE THE DAMAGE OF A TORNADO.

DO NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS. BE AWARE THAT HIGHWAY
BRIDGES DO NOT PROVIDE ADEQUATE PROTECTION AND CAN ENHANCE THE STRONG
WINDS OF A TORNADO.

THE TORNADO WITH THIS STORM WILL LIKELY BE WRAPPED IN RAIN. DO NOT BE
LULLED INTO THINKING THE THREAT IS OVER DUE TO THE RAINFALL. STAY IN
SHELTER UNTIL THE LATEST WEATHER INFORMATION INDICATES THE THREAT HAS
PASSED.

LAT...LON 3857 9023 3829 9037 3828 8972 3854 8971

$$
RP

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 4:11 PM CDT	Severe Thunderstorm Warning	LSX	Randolph, Saint Clair	49 min
Jun 18, 5:25 PM CDT	Severe Thunderstorm Warning	LSX	Clinton	50 min
Jun 18, 5:46 PM CDT	Severe Thunderstorm Warning	LSX	Marion	44 min

Nearby

Tornado Warnings in Illinois, 2004 Every tornado warning in 2004 Tornadoes in 2004

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.