Alert archive / Illinois / Tornado Warnings in 2003

Tornado Warning 32, NWS St. Louis, MO

May 9, 2003Calhoun County, Pike County, Illinois

NWS St. Louis, MO issued this tornado warning at May 9, 2003, 6:42 PM CDT for Calhoun County, Pike County, Illinois. It was in force for 48 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: May 9, 2003, 6:42 PM CDT (23:42 UTC)
Expired: May 9, 2003, 7:30 PM CDT
In force: 48 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

Counties Calhoun County, IL, Pike County, IL

The radar

The St Louis radar (KLSX), 78 km from the middle of the area, began a volume at 23:41 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
May 9, 4:45 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.7 hours before the alert went out and 206 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: 2615 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 727 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 348 m²/s²
0-3 km storm-relative helicity: 389 m²/s²
Significant tornado parameter: 5.6
Supercell composite: 21.6

Open this sounding in Storm Lab

The text

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

955 
WFUS53 KLSX 092342
TORLSX
ILC013-149-100030-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
641 PM CDT FRI MAY 9 2003

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN CALHOUN COUNTY IN SOUTHWEST ILLINOIS 
  SOUTHERN PIKE COUNTY IN WEST CENTRAL ILLINOIS

* UNTIL 730 PM CDT

* AT 641 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION 13 MILES WEST OF
  BELLEVIEW. THE STORM WAS MOVING EAST AT 20 MPH...AND MAY PRODUCE A
  TORNADO AT ANY TIME

* LOCATIONS IMPACTED INCLUDE...
  BELLEVIEW
  NEBO
  MOZIER
  BEECREEK
  KAMPSVILLE
  PEARL

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.

IF YOU LIVE IN A MOBILE HOME OR TRAILER...ABANDON IT IMMEDIATELY AND
SEEK SHELTER IN A MORE SUBSTANTIAL SHELTER.

LAT...LON 3944 9100 3929 9076 3928 9063 3950 9061

$$
JPK/MB

The office that day

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

Issued	Product	Office	Counties	Lasted
May 8, 8:21 PM CDT	Severe Thunderstorm Warning	LSX	Adams	39 min
May 8, 8:49 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown, Pike	26 min
May 8, 10:21 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey	39 min
May 9, 5:08 PM CDT	Severe Thunderstorm Warning	LSX	Randolph	22 min
May 9, 5:43 PM CDT	Severe Thunderstorm Warning	LSX	Randolph	32 min
May 9, 5:56 PM CDT	Severe Thunderstorm Warning	LSX	Greene	49 min
May 9, 6:01 PM CDT	Severe Thunderstorm Warning	LSX	Washington	44 min
May 9, 6:42 PM CDT	Severe Thunderstorm Warning	LSX	Marion	18 min
May 9, 6:45 PM CDT	Severe Thunderstorm Warning	LSX	Greene	30 min
May 9, 6:52 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin	38 min
May 9, 6:56 PM CDT	Tornado Warning	LSX	Greene, Macoupin	49 min

Nearby

Tornado Warnings in Illinois, 2003 Every tornado warning in 2003 Tornadoes in 2003

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.