Alert archive / Missouri / Tornado Warnings in 1993

Tornado Warning 9, NWS St. Louis, MO

July 31, 1993Saint Charles County, Saint Louis County, Missouri

NWS St. Louis, MO issued this tornado warning at Jul 31, 1993, 5:20 PM CDT for Saint Charles County, Saint Louis County, Missouri. It was in force for 40 min.

The area

The counties it named.

The facts

Issued: Jul 31, 1993, 5:20 PM CDT (22:20 UTC)
Expired: Jul 31, 1993, 6:00 PM CDT
In force: 40 min
Issued by: NWS St. Louis, MO
Area: Whole counties

Counties Saint Charles County, MO, Saint Louis County, MO

The nearest sounding before it

Paducah/Barkley, KY (KPAH), launched 12:00Z, 10.3 hours before the alert went out and 245 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: 1134 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 131 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 312220
TORSTL
MOC183-189-312300-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
520 PM CDT SAT JUL 31 1993
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  600 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN EAST CENTRAL MISSOURI
 
   ...ST CHARLES COUNTY...ST LOUIS COUNTY
 
AT 515 PM...A TORNADO WAS REPORTED IN FORISTELL IN EXTREME WESTERN ST
CHARLES COUNTY. THIS STORM WAS MOVING EAST SOUTHEAST AT 35 MILES AN
HOUR. TAKE COVER NOW!
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING.  AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH
OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
 
THIS IS A DANGEROUS STORM SITUATION.  ACT QUICKLY.  IF YOU ARE
IN THE PATH OF THIS TORNADO MOVE TO A SHELTER BELOW GROUND IF
AVAILABLE.  OTHERWISE...GO TO A SMALL INTERIOR ROOM ON THE LOWEST
FLOOR POSSIBLE.  AVOID WINDOWS.  ABANDON CARS AND MOBILE H6OMES
FOR A REINFORCED BUILDING OR GET INTO A DITCH OR CULVERT.
 
SHEA/RP
&

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 10:41 PM CDT	Flash Flood Warning	LSX	Saint Louis	3 hr
Jul 31, 3:06 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Shelby	54 min
Jul 31, 4:02 PM CDT	Severe Thunderstorm Warning	LSX	Ralls	43 min
Jul 31, 4:08 PM CDT	Severe Thunderstorm Warning	LSX	Audrain	37 min
Jul 31, 4:14 PM CDT	Severe Thunderstorm Warning	LSX	Pike	46 min
Jul 31, 4:31 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln	44 min
Jul 31, 5:02 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Warren	43 min
Jul 31, 5:15 PM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	45 min
Jul 31, 5:15 PM CDT	Severe Thunderstorm Warning	LSX	Franklin	45 min
Jul 31, 5:32 PM CDT	Tornado Warning	LSX	City of Saint Louis	28 min
Jul 31, 5:37 PM CDT	Flash Flood Warning	LSX	Saint Louis, City of Saint Louis	2 hr
Jul 31, 5:53 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson	52 min
Jul 31, 6:30 PM CDT	Severe Thunderstorm Warning	LSX	Washington	45 min

Nearby

Tornado Warnings in Missouri, 1993 Every tornado warning in 1993 Tornadoes in 1993

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.