Alert archive / Missouri / Tornado Warnings in 2002

Tornado Warning 1, NWS St. Louis, MO

April 19, 2002Franklin County, Gasconade County, Missouri

NWS St. Louis, MO issued this tornado warning at Apr 19, 2002, 6:25 PM CDT for Franklin County, Gasconade County, Missouri. It was in force for 50 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 19, 2002, 6:25 PM CDT (23:25 UTC)
Expired: Apr 19, 2002, 7:15 PM CDT
In force: 50 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

Counties Franklin County, MO, Gasconade County, MO

The radar

The St Louis radar (KLSX), 78 km from the middle of the area, began a volume at 23:27 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.

What was reported inside it

Time	Report	Where	Remark
Apr 19, 6:30 PM CDT	Hail 1	Gerald, MO	The County Sheriff Department reported 1 inch hail just south of Gerald.
Apr 19, 6:40 PM CDT	Hail 0.75	Owensville, MO	The County Sheriff reported 3/4 inch hail.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 19, 4:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 19, 5:30 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 11.4 hours before the alert went out and 262 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: 1060 J/kg
Mixed-layer CIN: -81 J/kg
Mixed-layer LCL: 849 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 251 m²/s²
0-3 km storm-relative helicity: 269 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.6

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KLSX 192325
TORSTL
MOC071-073-200015-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
625 PM CDT FRI APR 19 2002

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN FRANKLIN COUNTY IN EAST CENTRAL MISSOURI
  SOUTHERN GASCONADE COUNTY IN EAST CENTRAL MISSOURI

* UNTIL 715 PM CDT

* AT 625 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION NEAR CANAAN. THE
  THUNDERSTORM WAS MOVING NORTHEAST EAST AT 15 MPH...AND MAY PRODUCE 
  A TORNADO AT ANY TIME

* LOCATIONS IN THE PATH...
  OWENSVILLE
  ROSEBUD
  JAPAN
  GERALD
  LESLIE
  NOSER MILL
  BEAUFORT

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 3836 9165 3818 9159 3825 9112 3865 9130

The office that day

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

Issued	Product	Office	Lasted
Apr 19, 8:01 AM CDT	Severe Thunderstorm Warning	LSX	44 min
Apr 19, 8:42 AM CDT	Severe Thunderstorm Warning	LSX	48 min
Apr 19, 12:03 PM CDT	Severe Thunderstorm Warning	LSX	42 min
Apr 19, 12:42 PM CDT	Severe Thunderstorm Warning	LSX	48 min
Apr 19, 1:28 PM CDT	Severe Thunderstorm Warning	LSX	47 min
Apr 19, 5:12 PM CDT	Severe Thunderstorm Warning	LSX	33 min
Apr 19, 5:14 PM CDT	Severe Thunderstorm Warning	LSX	46 min
Apr 19, 5:43 PM CDT	Severe Thunderstorm Warning	LSX	47 min
Apr 19, 5:47 PM CDT	Severe Thunderstorm Warning	LSX	28 min
Apr 19, 5:51 PM CDT	Severe Thunderstorm Warning	LSX	54 min
Apr 19, 6:00 PM CDT	Severe Thunderstorm Warning	LSX	45 min
Apr 19, 6:25 PM CDT	Severe Thunderstorm Warning	LSX	50 min
Apr 19, 6:34 PM CDT	Severe Thunderstorm Warning	LSX	41 min
Apr 19, 6:54 PM CDT	Severe Thunderstorm Warning	LSX	51 min

Nearby

Tornado Warnings in Missouri, 2002 Every tornado warning in 2002 Tornadoes in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.