Alert archive / Missouri / Tornado Warnings in 1995

Tornado Warning 10, NWS St. Louis, MO

May 18, 1995Jefferson County, Missouri

NWS St. Louis, MO issued this tornado warning at May 18, 1995, 12:05 PM CDT for Jefferson County, Missouri. It was in force for 40 min.

The area

The counties it named.

The facts

Issued
May 18, 1995, 12:05 PM CDT (17:05 UTC)
Expired
May 18, 1995, 12:45 PM CDT
In force
40 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Jefferson County, MO

The radar

The St Louis radar (KLSX), 50 km from the middle of the area, began a volume at 17:07 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

Lincoln, IL (KILX), launched 12:00Z, 5.1 hours before the alert went out and 268 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, Lincoln, IL at 12:00Z on 1995-05-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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, Lincoln, IL at 12:00Z on 1995-05-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 256 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
507 m above ground
0-6 km bulk shear
76 kt
0-1 km storm-relative helicity
256 m²/s²
0-3 km storm-relative helicity
346 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 181707
TORSTL
MOC099-181745-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1205 PM CDT THU MAY 18 1995
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 1245 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN EAST CENTRAL MISSOURI
 
   ...JEFFERSON COUNTY
 
AT 1207 PM...RADAR INDICATED A TORNADO NEAR HILLSBORO. THE STORM WAS
MOVING TO THE EAST-NORTHEAST AT 30 MPH.
 
 
 
vIF YOU ARE IN THE PATH OF THIS STORM...TAKE COVER IN A BASEMENT
OR INTERIOR ROOM ON THE LOWEST LEVEL.

The office that day

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

IssuedProductOfficeCountiesLasted
May 17, 11:56 PM CDTFlash Flood WarningLSXFranklin, Jefferson, Saint Charles, Saint Louis4 hr
May 17, 11:56 PM CDTFlash Flood WarningLSXCity of Saint Louis4 hr
May 17, 11:56 PM CDTFlash Flood WarningLSXPerry, Sainte Genevieve4 hr
May 18, 8:32 AM CDTSevere Thunderstorm WarningLSXAudrain, Monroe43 min
May 18, 9:11 AM CDTSevere Thunderstorm WarningLSXRalls52 min
May 18, 10:32 AM CDTSevere Thunderstorm WarningLSXPhelps43 min
May 18, 10:50 AM CDTSevere Thunderstorm WarningLSXCrawford40 min
May 18, 11:19 AM CDTSevere Thunderstorm WarningLSXFranklin, Washington56 min
May 18, 11:30 AM CDTSevere Thunderstorm WarningLSXCrawford30 min
May 18, 11:37 AM CDTSevere Thunderstorm WarningLSXJefferson68 min
May 18, 12:54 PM CDTSevere Thunderstorm WarningLSXSainte Genevieve51 min

Nearby

Tornado Warnings in Missouri, 1995Every tornado warning in 1995Tornadoes in 1995

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.