Alert archive / Missouri / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 212, NWS St. Louis, MO

August 4, 1996Ralls County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Aug 4, 1996, 1:14 PM CDT for Ralls County, Missouri. It was in force for 31 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
Aug 4, 1996, 1:14 PM CDT (18:14 UTC)
Expired
Aug 4, 1996, 1:45 PM CDT
In force
31 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Ralls County, MO

The radar

The St Louis radar (KLSX), 117 km from the middle of the area, began a volume at 18:16 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
Aug 4, 1:25 PM CDTThunderstorm Wind 50Perry, MO

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

Davenport, (KDVN), launched 12:00Z, 6.2 hours before the alert went out and 248 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 1996-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 422 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, Davenport, at 12:00Z on 1996-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 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
422 J/kg
Mixed-layer CIN
-65 J/kg
Mixed-layer LCL
799 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
75 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSTL 041823
SVRSTL
MOC173-041845-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
114 PM CDT SUN AUG 4 1996
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  145 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHEAST MISSOURI
 
   ...SOUTHERN RALLS COUNTY
 
AT 1:18 PM NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM 3 MILES NORTHEAST OF PERRY. THE STORM WAS MOVING TO THE
SOUTHEAST AT 20 MPH. THE TOWN OF CENTER IS IN THE PATH OF THE STORM.
 
THIS IS A DANGEROUS STORM! BE PREPARED FOR DAMAGING WINDS UP TO
70 MPH...HAIL AND DEADLY LIGHTNING. STAY INSIDE AND AWAY FROM WINDOWS.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 4, 1:45 PM CDTSevere Thunderstorm WarningLSXPike45 min
Aug 4, 2:31 PM CDTSevere Thunderstorm WarningLSXLincoln59 min
Aug 4, 4:12 PM CDTSevere Thunderstorm WarningLSXFranklin63 min
Aug 4, 5:00 PM CDTSevere Thunderstorm WarningLSXJefferson, Washington60 min
Aug 4, 5:44 PM CDTSevere Thunderstorm WarningLSXWashington61 min

Nearby

Severe Thunderstorm Warnings in Missouri, 1996Every severe thunderstorm warning in 1996

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.