Alert archive / Missouri / Tornado Warnings in 1999

Tornado Warning 35, NWS St. Louis, MO

June 1, 1999Franklin County, Missouri

NWS St. Louis, MO issued this tornado warning at Jun 1, 1999, 6:50 PM CDT for Franklin 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
Jun 1, 1999, 6:50 PM CDT (23:50 UTC)
Expired
Jun 1, 1999, 7:40 PM CDT
In force
50 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Franklin County, MO

The radar

The St Louis radar (KLSX), 47 km from the middle of the area, began a volume at 23:53 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 1, 3:45 PM CDTTornado WatchSPC6 hr
Jun 1, 5:30 PM CDTTornado WatchSPC5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.8 hours before the alert went out and 288 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 1999-06-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 39 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 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 1999-06-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 39 square meters per square second.1939Sfc1 km3 km6 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
39 J/kg
Mixed-layer CIN
-266 J/kg
Mixed-layer LCL
953 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
39 m²/s²
0-3 km storm-relative helicity
1 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.

878 
WFUS1 KSTL 012352 RRA
TORSTL
MOC071-020040-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
650 PM CDT TUE JUN 1 1999

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  FRANKLIN COUNTY IN EAST CENTRAL MISSOURI

* UNTIL 740 PM CDT

* AT 649 PM... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO 1 MILE NORTH OF SULLIVAN... MOVING NORTHEAST AT 30 MPH.

* LOCATIONS IN THE PATH...
  ST CLAIR
  STANTON
  PARKWAY


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

FG/RP

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 1, 3:17 PM CDTSevere Thunderstorm WarningLSXShelby48 min
Jun 1, 3:27 PM CDTSevere Thunderstorm WarningLSXLewis48 min
Jun 1, 3:37 PM CDTSevere Thunderstorm WarningLSXMonroe48 min
Jun 1, 3:44 PM CDTSevere Thunderstorm WarningLSXMarion51 min
Jun 1, 4:06 PM CDTSevere Thunderstorm WarningLSXShelby34 min
Jun 1, 4:12 PM CDTTornado WarningLSXCole48 min
Jun 1, 4:19 PM CDTSevere Thunderstorm WarningLSXRalls51 min
Jun 1, 4:24 PM CDTSevere Thunderstorm WarningLSXBoone, Callaway51 min
Jun 1, 4:33 PM CDTSevere Thunderstorm WarningLSXLewis47 min
Jun 1, 5:01 PM CDTSevere Thunderstorm WarningLSXCole, Osage49 min
Jun 1, 5:11 PM CDTSevere Thunderstorm WarningLSXIron, Reynolds49 min
Jun 1, 5:22 PM CDTSevere Thunderstorm WarningLSXMontgomery48 min
Jun 1, 5:48 PM CDTSevere Thunderstorm WarningLSXMadison47 min
Jun 1, 5:49 PM CDTTornado WarningLSXLincoln51 min
Jun 1, 6:34 PM CDTTornado WarningLSXCrawford51 min
Jun 1, 6:44 PM CDTSevere Thunderstorm WarningLSXFranklin51 min

Nearby

Tornado Warnings in Missouri, 1999Every tornado warning in 1999Tornadoes in 1999

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.