Alert archive / Missouri / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 2, NWS St. Louis, MO

January 22, 1997Osage County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jan 22, 1997, 12:39 AM CST for Osage County, Missouri. It was in force for 36 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
Jan 22, 1997, 12:39 AM CST (06:39 UTC)
Expired
Jan 22, 1997, 1:15 AM CST
In force
36 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Osage County, MO

The radar

The St Louis radar (KLSX), 106 km from the middle of the area, began a volume at 06:38 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

Springfield, MO (KSGF), launched 00:00Z, 6.7 hours before the alert went out and 243 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, Springfield, MO at 00:00Z on 1997-01-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 10 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, Springfield, MO at 00:00Z on 1997-01-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 279 square meters per square second.193958Sfc1 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
10 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
598 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
279 m²/s²
0-3 km storm-relative helicity
376 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 220643 RRA
SVRSTL
MOC151-220715-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1239 AM CST WED JAN 22 1997
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  115 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN CENTRAL MISSOURI
 
   ...OSAGE COUNTY
 
AT 1238 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS DETECTING A
SEVERE THUNDERSTORM MOVING THROUGH OSAGE COUNTY...NEAR WESTPHALIA. THE
STORM WAS MOVING TO THE NORTHEAST AT 40 MPH. IT WILL MOVE THROUGH THE
TOWNS OF LINN...FREEBURG AND CHAMOIS BY 1250 AM.
 
THIS IS A DANGEROUS STORM! BE PREPARED FOR DAMAGING WINDS...LARGE HAIL
AND DEADLY LIGH&TNING. STAY INSIDE AND AWAY FROM WINDOWS.
 
GKS

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 22, 12:56 AM CSTSevere Thunderstorm WarningLSXGasconade34 min
Jan 22, 1:24 AM CSTSevere Thunderstorm WarningLSXFranklin36 min
Jan 22, 2:16 AM CSTSevere Thunderstorm WarningLSXCrawford, Franklin, Washington59 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.