Alert archive / Missouri / Tornado Warnings in 2003

Tornado Warning 47, NWS St. Louis, MO

May 10, 2003Knox County, Lewis County, Missouri

NWS St. Louis, MO issued this tornado warning at May 10, 2003, 5:44 PM CDT for Knox County, Lewis County, Missouri. It was in force for 31 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, 5:44 PM CDT (22:44 UTC)
Expired: May 10, 2003, 6:15 PM CDT
In force: 31 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

Counties Knox County, MO, Lewis County, MO

The radar

The Quad Cities radar (KDVN), 187 km from the middle of the area, began a volume at 22:46 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, 11:35 AM CDT	Tornado Watch	SPC	7 hr
May 10, 5:40 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 10.7 hours before the alert went out and 192 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: 1102 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 139 m²/s²
0-3 km storm-relative helicity: 225 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

274 
WFUS53 KLSX 102244
TORLSX
MOC103-111-102315-

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN KNOX COUNTY IN NORTHEAST MISSOURI
  NORTHERN LEWIS COUNTY IN NORTHEAST MISSOURI

* UNTIL 615 PM CDT

* AT 543 PM CDT...LAW ENFORCEMENT REPORTED A TORNADO 4 MILES 
NORTHWEST OF COLONY. RADAR INDICATED THE STORM WAS MOVING EAST AT   
45 MPH.

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 4033 9212 4015 9207 4018 9155 4028 9164

$$

FG

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 7:18 PM CDT	Severe Thunderstorm Warning	LSX	Audrain	42 min
May 9, 7:48 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	42 min
May 9, 8:26 PM CDT	Severe Thunderstorm Warning	LSX	Pike, Ralls	49 min
May 9, 10:08 PM CDT	Severe Thunderstorm Warning	LSX	Knox, Lewis	37 min
May 9, 10:16 PM CDT	Severe Thunderstorm Warning	LSX	Lewis	44 min
May 10, 2:19 AM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Warren	41 min
May 10, 3:42 AM CDT	Severe Thunderstorm Warning	LSX	Boone	63 min
May 10, 3:45 AM CDT	Flash Flood Warning	LSX	Audrain, Boone	4 hr
May 10, 5:08 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Pike, Ralls	52 min
May 10, 6:31 AM CDT	Flash Flood Warning	LSX	Pike	4 hr
May 10, 8:12 AM CDT	Severe Thunderstorm Warning	LSX	Saint Charles	48 min
May 10, 8:19 AM CDT	Tornado Warning	LSX	Saint Charles, Saint Louis	41 min
May 10, 8:43 AM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	47 min
May 10, 10:47 AM CDT	Tornado Warning	LSX	Crawford	43 min
May 10, 11:07 AM CDT	Flash Flood Warning	LSX	Lincoln, Saint Charles	3 hr
May 10, 11:15 AM CDT	Flash Flood Warning	LSX	Audrain	3 hr
May 10, 11:26 AM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	49 min
May 10, 4:54 PM CDT	Tornado Warning	LSX	Knox	51 min
May 10, 5:21 PM CDT	Tornado Warning	LSX	Shelby	39 min
May 10, 5:35 PM CDT	Tornado Warning	LSX	Monroe	40 min
May 10, 5:42 PM CDT	Tornado Warning	LSX	Boone, Moniteau	48 min
May 10, 5:47 PM CDT	Tornado Warning	LSX	Lewis, Marion	43 min
May 10, 6:04 PM CDT	Severe Thunderstorm Warning	LSX	Shelby	41 min
May 10, 6:08 PM CDT	Severe Thunderstorm Warning	LSX	Crawford	37 min
May 10, 6:13 PM CDT	Tornado Warning	LSX	Marion, Monroe, Ralls	47 min
May 10, 6:28 PM CDT	Tornado Warning	LSX	Lewis	47 min
May 10, 6:29 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone	61 min
May 10, 6:39 PM CDT	Severe Thunderstorm Warning	LSX	Franklin	66 min
May 10, 6:53 PM CDT	Tornado Warning	LSX	Marion	52 min

Nearby

Tornado Warnings in Missouri, 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.