Alert archive / Illinois / Tornado Warnings in 2003

Tornado Warning 40, NWS St. Louis, MO

May 10, 2003Macoupin County, Illinois

NWS St. Louis, MO issued this tornado warning at May 10, 2003, 8:41 AM CDT for Macoupin County, Illinois. It was in force for 34 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 10, 2003, 8:41 AM CDT (13:41 UTC)
Expired: May 10, 2003, 9:15 AM CDT
In force: 34 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

County Macoupin County, IL

The radar

The St Louis radar (KLSX), 72 km from the middle of the area, began a volume at 13:43 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 10, 5:50 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 1.7 hours before the alert went out and 169 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: 474 J/kg
Mixed-layer CIN: -156 J/kg
Mixed-layer LCL: 763 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 168 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

212 
WFUS53 KLSX 101341
TORLSX
ILC117-101415-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
842 AM CDT SAT MAY 10 2003

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

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

* UNTIL 915 AM CDT

* AT 842 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION NEAR BRIGHTON. THE STORM
  WAS MOVING EAST AT 55 MPH...AND MAY PRODUCE A TORNADO AT ANY TIME

* LOCATIONS IMPACTED INCLUDE...
  BUNKER HILL
  PRUETT
  DORCHESTER
  WILSONVILLE
  BENLD
  WHITE CITY
  MOUNT OLIVE

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 3909 9027 3898 9016 3900 8970 3931 8972

$$

CARNEY

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 7:42 PM CDT	Tornado Warning	LSX	Greene, Macoupin	48 min
May 9, 8:12 PM CDT	Tornado Warning	LSX	Montgomery	33 min
May 9, 8:14 PM CDT	Flash Flood Warning	LSX	Macoupin	4 hr
May 9, 8:27 PM CDT	Tornado Warning	LSX	Macoupin	33 min
May 9, 8:32 PM CDT	Severe Thunderstorm Warning	LSX	Washington	28 min
May 9, 8:43 PM CDT	Tornado Warning	LSX	Montgomery	32 min
May 9, 9:02 PM CDT	Severe Thunderstorm Warning	LSX	Pike	43 min
May 9, 9:11 PM CDT	Tornado Warning	LSX	Pike	49 min
May 9, 9:18 PM CDT	Severe Thunderstorm Warning	LSX	Brown	27 min
May 9, 10:12 PM CDT	Severe Thunderstorm Warning	LSX	Adams	33 min
May 9, 11:42 PM CDT	Flash Flood Warning	LSX	Macoupin	3 hr
May 10, 6:25 AM CDT	Severe Thunderstorm Warning	LSX	Greene, Pike	50 min
May 10, 6:31 AM CDT	Flash Flood Warning	LSX	Pike	4 hr
May 10, 7:47 AM CDT	Severe Thunderstorm Warning	LSX	Macoupin	28 min
May 10, 8:06 AM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	24 min
May 10, 8:12 AM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Jersey, Madison	48 min
May 10, 8:19 AM CDT	Tornado Warning	LSX	Madison	41 min
May 10, 8:31 AM CDT	Severe Thunderstorm Warning	LSX	Montgomery	29 min
May 10, 8:43 AM CDT	Severe Thunderstorm Warning	LSX	Madison	47 min
May 10, 9:11 AM CDT	Flash Flood Warning	LSX	Greene	4 hr
May 10, 9:18 AM CDT	Tornado Warning	LSX	Bond, Madison	27 min
May 10, 10:15 AM CDT	Severe Thunderstorm Warning	LSX	Fayette	30 min
May 10, 11:07 AM CDT	Flash Flood Warning	LSX	Calhoun	3 hr
May 10, 11:53 AM CDT	Severe Thunderstorm Warning	LSX	Saint Clair	52 min
May 10, 12:30 PM CDT	Severe Thunderstorm Warning	LSX	Clinton	45 min
May 10, 6:21 PM CDT	Tornado Warning	LSX	Adams	39 min
May 10, 6:53 PM CDT	Tornado Warning	LSX	Adams	52 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.