Alert archive / Missouri / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 77, NWS St. Louis, MO

May 25, 1997Cole County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 25, 1997, 6:18 PM CDT for Cole County, Missouri. It was in force for 27 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
May 25, 1997, 6:18 PM CDT (23:18 UTC)
Expired
May 25, 1997, 6:45 PM CDT
In force
27 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Cole County, MO

The radar

The St Louis radar (KLSX), 141 km from the middle of the area, began a volume at 23:21 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 12:00Z, 11.3 hours before the alert went out and 223 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 12:00Z on 1997-05-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 35 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 12:00Z on 1997-05-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 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
35 J/kg
Mixed-layer CIN
-62 J/kg
Mixed-layer LCL
830 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
35 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.

437 
WUUS1 KSTL 252319 RRA
SVRSTL
MOC051-252345-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
618 PM CDT SUN MAY 25 1997
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  645 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN CENTRAL MISSOURI
 
   ...COLE COUNTY
 
AT 615 PM...NATIONAL WEATHER SERVICE RADAR WAS DETECTING A SEVERE
THUNDERSTORM NEAR THE TOWN OF HICKORY HILL IN SOUTHWESTERN COLE COUNTY.
THE STORM WAS MOVING EASTWARD AT 30 MPH. IT WILL MOVE THROUGH THE TOWNS
OF ST THOMAS...BRAZITO AND OSAGE BEND.
 
THIS STORM HAS A HISTORY OF DAMAGING HAIL. STAY INSIDE AND AWAY
FROM WINDOWS.
 
GKS/BW

The office that day

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

IssuedProductOfficeCountiesLasted
May 25, 5:34 PM CDTSevere Thunderstorm WarningLSXCole, Moniteau41 min
May 25, 6:08 PM CDTSevere Thunderstorm WarningLSXAudrain, Boone52 min
May 25, 6:27 PM CDTSevere Thunderstorm WarningLSXFranklin, Saint Charles, Warren48 min
May 25, 6:42 PM CDTSevere Thunderstorm WarningLSXOsage48 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.