Alert archive / Missouri / Tornado Warnings in 2002

Tornado Warning 6, NWS St. Louis, MO

April 27, 2002Callaway County, Missouri

NWS St. Louis, MO issued this tornado warning at Apr 27, 2002, 8:00 PM CDT for Callaway County, Missouri. It was in force for 45 min. 4 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 27, 2002, 8:00 PM CDT (01:00 UTC)
Expired: Apr 27, 2002, 8:45 PM CDT
In force: 45 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

County Callaway County, MO

The radar

The St Louis radar (KLSX), 113 km from the middle of the area, began a volume at 00:53 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
Apr 27, 8:05 PM CDT	Hail 1	New Bloomfield, MO
Apr 27, 8:05 PM CDT	Thunderstorm Wind 52 E	New Bloomfield, MO
Apr 27, 8:05 PM CDT	Hail 0.75	Fulton, MO
Apr 27, 8:09 PM CDT	Hail 1.75	Fulton, MO

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 27, 6:30 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 1.0 hours before the alert went out and 265 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: 1053 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 905 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 256 m²/s²
0-3 km storm-relative helicity: 299 m²/s²
Significant tornado parameter: 2.1
Supercell composite: 9.8

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KLSX 280100
TORSTL
MOC027-280145-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
800 PM CDT SAT APR 27 2002

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  CALLAWAY COUNTY IN CENTRAL MISSOURI

* UNTIL 845 PM CDT

* AT 800 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION NEAR NEW BLOOMFIELD. THE
  THUNDERSTORM WAS MOVING EAST AT 50 MPH...AND MAY PRODUCE A TORNADO
  AT ANY TIME

* LOCATIONS IN THE PATH...
  FULTON
  STEEDMAN
  REFORM
  WILLIAMSBURG

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 3879 9219 3862 9214 3872 9166 3906 9170

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 27, 7:40 PM CDT	Severe Thunderstorm Warning	LSX		50 min
Apr 27, 7:51 PM CDT	Severe Thunderstorm Warning	LSX		39 min
Apr 27, 8:17 PM CDT	Tornado Warning	LSX	Montgomery, Warren	43 min
Apr 27, 8:27 PM CDT	Severe Thunderstorm Warning	LSX		33 min
Apr 27, 9:45 PM CDT	Severe Thunderstorm Warning	LSX		45 min
Apr 27, 10:32 PM CDT	Severe Thunderstorm Warning	LSX		43 min
Apr 27, 11:07 PM CDT	Severe Thunderstorm Warning	LSX		38 min
Apr 27, 11:20 PM CDT	Severe Thunderstorm Warning	LSX		40 min
Apr 27, 11:22 PM CDT	Severe Thunderstorm Warning	LSX		38 min
Apr 27, 11:30 PM CDT	Tornado Warning	LSX	Reynolds	30 min
Apr 27, 11:34 PM CDT	Severe Thunderstorm Warning	LSX		26 min
Apr 27, 11:34 PM CDT	Severe Thunderstorm Warning	LSX		41 min
Apr 27, 11:57 PM CDT	Severe Thunderstorm Warning	LSX		48 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.