Alert archive / Missouri / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 127, NWS St. Louis, MO

July 3, 1997Knox County, Lewis County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 3, 1997, 12:16 PM CDT for Knox County, Lewis County, Missouri. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 3, 1997, 12:16 PM CDT (17:16 UTC)
Expired
Jul 3, 1997, 1:00 PM CDT
In force
44 min
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Knox County, MO, Lewis County, MO

The radar

The St Louis radar (KLSX), 190 km from the middle of the area, began a volume at 17:20 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.

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 5.3 hours before the alert went out and 207 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, Davenport, at 12:00Z on 1997-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 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, Davenport, at 12:00Z on 1997-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -4 square meters per square second.1939587897117Sfc1 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
1 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
695 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
-4 m²/s²
0-3 km storm-relative helicity
81 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 031719 RRA
SVRSTL
MOC103-111-031800-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1216 PM CDT THU JUL 3 1997
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  100 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHEAST MISSOURI
 
   ...KNOX COUNTY...WESTERN LEWIS COUNTY
 
AT 1216 PM...WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM 4
MILES SOUTH OF EDINA...MOVING EAST AT 25 MPH.
 
TOWNS IN THE PATH OF THIS STORM INCLUDE KNOX CITY...LA BELLE.  HAIL UP
TO 1 INCH IN DIAMETER CAN BE EXPECTED WITH THE STORMS PASSAGE.
 
THIS IS A DANGEROUS STORM! BE PREPARED FOR DAMAGING WINDS...HAIL
AND DEADLY LIGHTNING. STAY INSIDE AND AWAY FROM WINDOWS.
 
TRUETT/GLASS

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 3, 10:56 AM CDT, 1 hour 20 minutes before
ILZ058>060-064-065-069-070-074-079-095>102-MOZ009-010-018-019-026-
027-034>036-041-042-047>052-059>065-072>075-084-085-099-032200-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ST LOUIS MO
1100 AM CDT WED JUL 2 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.

THERE IS SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE MUCH OF
CENTRAL AND EASTERN MISSOURI. THE SLIGHT RISK AREA IS WEST OF A LINE
FROM EDINA TO WENTZVILLE TO FREDERICKTOWN.

THUNDERSTORMS ARE EXPECTED TO DEVELOP IN WESTERN AND CENTRAL MISSOURI
THIS AFTERNOONz AND MOVE SOUTHEAST ACROSS THE STATE.

EMERGENCY MANAGERS AND STORM SPOTTERS SHOULD KEEP ADVISED OF THE
LATEST FORECAST FOR POSSIBLE SKYWARN ACTIVATION.

AMS
Special weather statement, Jul 3, 10:57 AM CDT, 1 hour 19 minutes before
ILZ058>060-064-065-069-070-074-079-095>102-MOZ009-010-018-019-026-
027-034>036-041-042-047>052-059>065-072>075-084-085-099-032200-

SEVERE WEATHER OUTLOOK...CORRECTED DATE
NATIONAL WEATHER SERVICE ST LOUIS MO
1100 AM CDT THU JUL 3 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.

THERE IS SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE MUCH OF
CENTRAL AND EASTERN MISSOURI. THE SLIGHT RISK AREA IS WEST OF A LINE
FROM EDINA TO WENTZVILLE TO FREDERICKTOWN.

THUNDERSTORMS ARE EXPECTED TO DEVELOP IN WESTERN AND CENTRAL M|ISSOURI
THIS AFTERNOON AND MOVE SOUTHEAST ACROSS THE STATE.

EMERGENCY MANAGERS AND STORM SPOTTERS SHOULD KEEP ADVISED OF THE
LATEST FORECAST FOR POSSIBLE SKYWARN ACTIVATION.

AMS
Special weather statement, Jul 3, 11:00 AM CDT, 1 hour 16 minutes before
ILZ058>060-064-065-069-070-074-079-095>102-MOZ009-010-018-019-026-
027-034>036-041-042-047>052-059>065-072>075-084-085-099-032200-

SEVERE WEATHER OUTLOOK...CORRECTED DATE
NATIONAL WEATHER SERVICE ST LOUIS MO
1100 AM CDT THU JUL 3 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.

THERE IS SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE MUCH OF
CENTRAL AND EASTERN MISSOURI. THE SLIGHT RISK AREA IS WEST OF A LINE
FROM EDINA TO WENTZVILLE TO FREDERICKTOWN.

THUNDERSTORMS ARE EXPECTED TO DEVELOP IN WESTERN AND CENTRAL MISSOURI
THIS AFTERNOON AND MOVE SOUTHEAST ACROSS THE STATE.

EMERGENCY MANAGERS AND STORM SPOTTERS SHOULD KEEP ADVISED OF THE
LATEST FORECAST FOR POSSIBLE SKYWARN ACTIVATION.

AMS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 3, 2:57 PM CDTFlash Flood WarningLSXKnox, Lewis4 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.