Alert archive / Missouri / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 190, NWS St. Louis, MO

July 19, 1996Saint Louis County, City of Saint Louis, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 19, 1996, 7:21 PM CDT for Saint Louis County, City of Saint Louis, Missouri. It was in force for 54 min. 3 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 19, 1996, 7:21 PM CDT (00:21 UTC)
Expired: Jul 19, 1996, 8:15 PM CDT
In force: 54 min
Issued by: NWS St. Louis, MO
Area: Whole counties

Counties City of Saint Louis, MO, Saint Louis County, MO

What was reported inside it

Time	Report	Where
Jul 19, 7:35 PM CDT	Thunderstorm Wind 55	Florissant, MO
Jul 19, 8:00 PM CDT	Thunderstorm Wind 55	Crestwood, MO
Jul 19, 8:10 PM CDT	Thunderstorm Wind 55	Lemay, 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 nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 0.4 hours before the alert went out and 224 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: 1299 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 884 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 203 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 200026
SVRSTL
MOC189-510-200115-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
721 PM CDT FRI JUL 19 1996
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  815 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN EAST CENTRAL MISSOURI
 
   ...ST. LOUIS COUNTY
 
  AND THE INDEPENDENT CITY OF
 
   ...ST. LOUIS CITY
 
A LINE OF SEVERE THUNDERSTORMS EXTENDED FROM PORTAGE DES SOIUX THROUGH
O'FALLON TO NEAR WENTZVILLE. THE STORMS WERE MOVING TO THE SOUTHEAST AT
20 MPH. WINDS OF 55 TO 65 MPH WILL ACCOMPANY THESE STORMS.
 
THIS STORM HAS A HISTORY OF DAMAGING WINDS. SEEK INSIDE SHELTER
NOW!
 ~
AMS/FG
 
&

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jul 19, 6:59 PM CDT, 22 minutes before

MOZ042-041-050-010-048-072-062-059-084-018-019-052-085-027-047-
051-034-049-036-035-099-061-075-074-063-064-009-026-060-073-ILZ095-
064-096-098-069-065-058-099-059-100-070-102-060-097-079-101-074-
MOZ065-011600-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ST LOUIS MO
652 PM CDT FRI JUL 19 1996

THIS OUTLOOK COVERS THE COUNTY WARNING AREA OF THE NWS OFFICE
IN ST. LOUIS. AREAS INCLUDED ARE PARTS OF CENTRAL...NORTHEAST AND
EAST CENTRAL MISSOURI...AND SOUTHWEST ILLINOIS.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS EVENING ALONG
AND NORTH OF I-70. THIS INCLUDES THE CITIES OF ST. LOUIS...
COLUMBIA...AND THE HANNIBAL/QUINCY AREA.

STORM SPOTTER GROUPS AND EMERGENCY MANAGERS SHOULD K&EEP ADVISED OF
THE LATEST FORECAST FOR POSSIBLE SKYWARN ACTION.

AMS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 7:42 PM CDT	Tornado Warning	LSX	Jefferson, Saint Louis	33 min
Jul 19, 7:59 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson	46 min
Jul 20, 2:58 PM CDT	Severe Thunderstorm Warning	LSX	Reynolds	32 min

Nearby

Severe Thunderstorm Warnings in Missouri, 1996 Every severe thunderstorm warning in 1996

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.