Alert archive / Missouri / Tornado Warnings in 2000

Tornado Warning 12, NWS St. Louis, MO

April 16, 2000Saint Charles County, Saint Louis County, Missouri

NWS St. Louis, MO issued this tornado warning at Apr 16, 2000, 3:24 PM CDT for Saint Charles County, Saint Louis County, Missouri. It was in force for 46 min. 6 reports 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
Apr 16, 2000, 3:24 PM CDT (20:24 UTC)
Expired
Apr 16, 2000, 4:10 PM CDT
In force
46 min
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Saint Charles County, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 11 km from the middle of the area, began a volume at 20:28 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
Apr 16, 3:25 PM CDTHail 0.75O Fallon, MO
Apr 16, 3:27 PM CDTHail 1St Peters, MO
Apr 16, 3:50 PM CDTHail 0.75St Charles, MOStorm spotters reported 3/4 inch hail near Interstate 70 and the Missouri River.
Apr 16, 4:02 PM CDTHail 0.75Florissant, MO
Apr 16, 4:03 PM CDTHail 0.75Florissant, MO
Apr 16, 4:10 PM CDTHail 0.75Bridgeton, 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

Lincoln, IL (KILX), launched 12:00Z, 8.4 hours before the alert went out and 232 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 2000-04-16Temperature 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, Lincoln, IL at 12:00Z on 2000-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1031 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
90 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.

307 
WFUS53 KLSX 162024
TORSTL
MOC183-189-162110-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
324 PM CDT SUN APR 16 2000

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI
  NORTHERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI

* UNTIL 410 PM CDT

* AT 321 PM... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO NEAR WELDON SPRING... MOVING EAST AT 25 MPH.

* LOCATIONS IN THE PATH...
  WELDON SPRING
  ST PETERS
  ST CHARLES
  FLORISSANT

SPOTTERS HAVE REPORTED A WALL CLOUD WHICH IS THE INITIAL FORMATION
OF A TORNADO.

IF YOU ARE IN THE PATH OF THIS STORM...SEEK SHELTER NOW A
BASEMENT OFFERS THE BEST PROTECTION. IF NOT AVAILABLE...MOVE TO
THE LOWEST FLOOR AND SEEK SHELTER IN A SMALL INTERIOR ROOM. STAY
AWAY FROM OUTSIDE WALLS AND WINDOWS. MOBILE HOMES SHOULD BE
ABANDONED IN FAVOR OF A MORE SUBSTANTIAL STRUCTURE. DO NOT TRY TO
OUTRUN A TORNADO IN A VEHICLE

GKS/ST

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 16, 1:00 PM CDTSevere Thunderstorm WarningLSXGasconade, Montgomery, Osage35 min
Apr 16, 1:28 PM CDTSevere Thunderstorm WarningLSXGasconade32 min
Apr 16, 2:01 PM CDTSevere Thunderstorm WarningLSXFranklin29 min
Apr 16, 2:23 PM CDTSevere Thunderstorm WarningLSXWarren52 min
Apr 16, 2:30 PM CDTSevere Thunderstorm WarningLSXRalls50 min
Apr 16, 2:36 PM CDTTornado WarningLSXWarren34 min
Apr 16, 2:49 PM CDTSevere Thunderstorm WarningLSXFranklin, Saint Charles46 min
Apr 16, 2:53 PM CDTTornado WarningLSXSaint Charles32 min
Apr 16, 2:59 PM CDTSevere Thunderstorm WarningLSXCrawford, Washington51 min
Apr 16, 3:26 PM CDTSevere Thunderstorm WarningLSXJefferson49 min
Apr 16, 3:36 PM CDTSevere Thunderstorm WarningLSXJefferson49 min
Apr 16, 3:46 PM CDTSevere Thunderstorm WarningLSXPike49 min
Apr 16, 4:13 PM CDTSevere Thunderstorm WarningLSXSaint Charles, Saint Louis47 min
Apr 16, 5:04 PM CDTSevere Thunderstorm WarningLSXLincoln51 min
Apr 16, 6:32 PM CDTSevere Thunderstorm WarningLSXSaint Charles43 min

Nearby

Tornado Warnings in Missouri, 2000Every tornado warning in 2000Tornadoes in 2000

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.