Alert archive / Missouri / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 52, NWS St. Louis, MO

May 2, 1997Marion County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 2, 1997, 10:25 PM CDT for Marion County, Missouri. It was in force for 50 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 2, 1997, 10:25 PM CDT (03:25 UTC)
Expired
May 2, 1997, 11:15 PM CDT
In force
50 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Marion County, MO

The radar

The St Louis radar (KLSX), 147 km from the middle of the area, began a volume at 03:26 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 00:00Z, 3.4 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, Davenport, at 00:00Z on 1997-05-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 1997-05-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
483 m above ground
0-6 km bulk shear
69 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
65 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 030326 RRA
SVRSTL
MOC127-030415-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1025 PM CDT FRI MAY 2 1997
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1115 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHEAST MISSOURI
 
   ...MARION COUNTY
 
AT 1020 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM IN SOUTHWEST MARION COUNTY 5 MILES SOUTH OF WARREN.
THIS STORM WAS MOVING TO THE NORTHEAST AT 35 MPH. TOWNS IN THE PATH OF
THIS STORM ARE WARREN AND PALMYRA.  THE LARGEST THREAT FROM THIS STORM
WILL BE LARGE HAIL.
 
THIS STORM HAS A HISTORY OF DAMAGING HAIL.j STAY INSIDE AND AWAY
FROM WINDOWS.
 
JP/RP

The office that day

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

IssuedProductOfficeCountiesLasted
May 2, 8:53 PM CDTSevere Thunderstorm WarningLSXAudrain, Boone52 min
May 2, 9:01 PM CDTSevere Thunderstorm WarningLSXMonroe44 min
May 2, 9:19 PM CDTSevere Thunderstorm WarningLSXRalls41 min
May 2, 9:30 PM CDTSevere Thunderstorm WarningLSXScotland45 min
May 2, 9:37 PM CDTSevere Thunderstorm WarningLSXKnox53 min
May 2, 10:08 PM CDTSevere Thunderstorm WarningLSXShelby52 min
May 2, 10:35 PM CDTSevere Thunderstorm WarningLSXLincoln, Montgomery40 min
May 2, 10:44 PM CDTSevere Thunderstorm WarningLSXPike, Ralls31 min
May 2, 11:21 PM CDTSevere Thunderstorm WarningLSXLincoln39 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.