Alert archive / Missouri / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 201, NWS St. Louis, MO

July 28, 1996Saint Louis County, City of Saint Louis, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 28, 1996, 8:55 PM CDT for Saint Louis County, City of Saint Louis, Missouri. It was in force for 50 min. 1 report 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 28, 1996, 8:55 PM CDT (01:55 UTC)
Expired: Jul 28, 1996, 9:45 PM CDT
In force: 50 min
Issued by: NWS St. Louis, MO
Area: Whole counties

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

The radar

The St Louis radar (KLSX), 32 km from the middle of the area, began a volume at 01:55 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
Jul 28, 9:40 PM CDT	Hail 0.75	South County, 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, 1.9 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: 379 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 958 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 290202
SVRSTL
MOC189-510-290245-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
855 PM CDT SUN JUL 28 1996
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  945 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN EAST CENTRAL MISSOURI
 
   ...EASTERN ST. LOUIS COUNTY
 
  AND THE INDEPENDENT CITY OF
 
   ...ST. LOUIS CITY
 
AT 855 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
ABOUT 2 MILES SOUTH OF FLORISSANT. THIS STORM WAS MOVING TO THE
SOUTHEAST AROUND 20 MILES AN HOUR.  PERSONS IN FERGUSON AND
UNIVERSITY CITY ARE IN THE PATH OF THIS STORM.
 
GOLF-BALL SIZE HAIL WAS REPORTED IN ST ANN ABOUT 855 PM.
 
THIS STORM HAS A HISTORY OF DAMAGING HAIL. STAY INSIDE AND AWAY
FROM WINDOWS.
 
 
&

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 10:57 PM CDT	Severe Thunderstorm Warning	LSX	City of Saint Louis	63 min
Jul 29, 1:43 AM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	32 min
Jul 29, 3:20 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Warren	25 min
Jul 29, 3:29 AM CDT	Severe Thunderstorm Warning	LSX	Crawford	46 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; radar from the NEXRAD Level II archive.