Alert archive / Illinois / Tornado Warnings in 2004

Tornado Warning 64, NWS St. Louis, MO

October 18, 2004Randolph County, Illinois

NWS St. Louis, MO issued this tornado warning at Oct 18, 2004, 4:49 PM CDT for Randolph County, Illinois. It was in force for 56 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: Oct 18, 2004, 4:49 PM CDT (21:49 UTC)
Expired: Oct 18, 2004, 5:45 PM CDT
In force: 56 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

County Randolph County, IL

The radar

The St Louis radar (KLSX), 112 km from the middle of the area, began a volume at 21:51 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
Oct 18, 12:40 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 9.8 hours before the alert went out and 269 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: 480 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 161 m²/s²
0-3 km storm-relative helicity: 217 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 182149
TORLSX
ILC157-182245-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
449 PM CDT MON OCT 18 2004

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN RANDOLPH COUNTY IN SOUTHWEST ILLINOIS

* UNTIL 545 PM CDT

* AT 449 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION 13 MILES SOUTHWEST OF
  MODOC. THE STORM WAS MOVING EAST AT 40 MPH...AND MAY PRODUCE A
  TORNADO AT ANY TIME

* LOCATIONS IMPACTED INCLUDE...
  ROOTS
  KASKASKIA
  ELLIS GROVE
  CHESTER
  NEW PALESTINE
  BREMEN
  WELGE
  ROCKWOOD

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.

LAT...LON 3791 8986 3788 8988 3789 8996 3792 8997
      3796 8995 3797 9000 3806 9014 3806 8960
      3794 8961 3784 8968 3783 8971

$$

CVKING

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 18, 2:10 PM CDT	Severe Thunderstorm Warning	LSX	Montgomery	50 min
Oct 18, 2:58 PM CDT	Severe Thunderstorm Warning	LSX	Montgomery	32 min
Oct 18, 5:16 PM CDT	Severe Thunderstorm Warning	LSX	Monroe	44 min
Oct 18, 5:46 PM CDT	Severe Thunderstorm Warning	LSX	Randolph	44 min
Oct 18, 5:57 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	63 min
Oct 18, 6:38 PM CDT	Severe Thunderstorm Warning	LSX	Fayette	67 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; radar from the NEXRAD Level II archive.