Alert archive / Missouri / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 144, NWS St. Louis, MO

July 19, 1997Saint Charles County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 19, 1997, 3:46 PM CDT for Saint Charles County, Missouri. It was in force for 44 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 19, 1997, 3:46 PM CDT (20:46 UTC)
Expired
Jul 19, 1997, 4:30 PM CDT
In force
44 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Saint Charles County, MO

The radar

The St Louis radar (KLSX), 9 km from the middle of the area, began a volume at 20:50 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

TimeReportWhereRemark
Jul 19, 3:46 PM CDTHail 1St Peters, MOOff duty National Weather Service employees reported hail ranging from 1/2 to 1 inch in diameter. The hail fel l in in southern St. Peters near Jungermann and McClay roads, and along Highway 94 from Harvester to Kisker Roads.

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 12:00Z, 8.8 hours before the alert went out and 234 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-pSkew-T log-p diagram, Lincoln, IL at 12:00Z on 1997-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1479 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 1997-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 35 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1479 J/kg
Mixed-layer CIN
-96 J/kg
Mixed-layer LCL
924 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
35 m²/s²
0-3 km storm-relative helicity
56 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 192048 RRA
SVRSTL
MOC183-192130-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
346 PM CDT SAT JUL 19 1997
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  430 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN EAST CENTRAL MISSOURI
 
   ...ST. CHARLES COUNTY
 
AT 345 PM CDT..NWS DOPPLER RADAR SHOWED A SEVERE THUNDERSTORM OVER ST.
PETERS MISSOURI. THE STORM IS MOVING TO THE SOUTHEAST AT 5 MPH AND WILL
AFFECT THE TOWN OF HARVESTER.
 
HAIL THE SIZE OF ONE INCH AND DAMAGING WINDS CAN BE EXPECTED WITH THIS
STORM.
 
THIS IS A DANGEROUS STORM! BE PREPARED FOR DAMAGING WINDS...HAIL
AND DEADLY LIGHTNING. STAY INSIDE AND AWAY FROM WINDOWS.
 
RP

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, 10:45 AM CDT, 5 hours 1 minute before
MOZ042-041-050-010-048-072-062-059-084-018-019-065-052-085-027-047-
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-
200200-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ST LOUIS MO
1045 AM CDT SAT JUL 19 1997

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

WIDELY SCATTERED THUNDERSTORMS WERE PRESENT THIS MORNING OVER PORTIONS
OF WESTERN ILLINOIS AND EASTERN MISSOURI...THEY WILL BECOME MORE NUMEROUS
THIS AFTERNOON AND EARLY THIS EVENING.  ALSO THESE STORMS WILL PRODUCE
BRIEF HEAVY RAIN AND SMALL HAIL.

SKYWARN ACTIVATION IS NOT ANTICIPATED...BUT SPOTTERS AND EMERGENCY
MANAGERS SHOULD MONITOR THE LATEST STATEMENTS AND FORECASTS.
Special weather statement, Jul 19, 10:46 AM CDT, 5 hours before
MOZ042-041-050-010-048-072-062-059-084-018-019-065-052-085-027-047-
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-
200200-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ST LOUIS MO
1045 AM CDT SAT JUL 19 1997

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

WIDELY SCATTERED THUNDERSTORMS WERE PRESENT THIS MORNING OVER PORTIONS
OF WESTERN ILLINOIS AND EASTERN MISSOURI...THEY WILL BECOME MORE NUMEROUS
THIS AFTERNOON AND EARLY THIS EVENING.  ALSO THESE STORMS WILL PRODUCE
BRIEF HEAVY RAIN AND SMALL HAIL.

SKYWARN ACTIVATION IS NOT ANTICIPATED...BUT SPOTTERS AND EMERGENCY
MANAGERS SHOULD MONITOR THE LATEST STATEMENTS AND FORECASTS.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 19, 12:59 PM CDTSevere Thunderstorm WarningLSXMarion, Ralls46 min
Jul 19, 1:41 PM CDTSevere Thunderstorm WarningLSXLincoln49 min
Jul 19, 1:59 PM CDTSevere Thunderstorm WarningLSXClark46 min
Jul 19, 3:52 PM CDTSevere Thunderstorm WarningLSXMonroe53 min
Jul 19, 4:00 PM CDTSevere Thunderstorm WarningLSXSaint Louis, City of Saint Louis45 min
Jul 19, 5:41 PM CDTSevere Thunderstorm WarningLSXSainte Genevieve34 min

Nearby

Severe Thunderstorm Warnings in Missouri, 1997Every severe thunderstorm warning in 1997

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.