Alert archive / Missouri / Tornado Warnings in 1998

Tornado Warning 54, NWS St. Louis, MO

June 10, 1998Boone County, Missouri

NWS St. Louis, MO issued this tornado warning at Jun 10, 1998, 5:21 AM CDT for Boone County, Missouri. It was in force for 49 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 10, 1998, 5:21 AM CDT (10:21 UTC)
Expired
Jun 10, 1998, 6:10 AM CDT
In force
49 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Boone County, MO

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 10.4 hours before the alert went out and 267 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, Springfield, MO at 00:00Z on 1998-06-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2845 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, Springfield, MO at 00:00Z on 1998-06-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 66 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
2845 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
988 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
66 m²/s²
0-3 km storm-relative helicity
141 m²/s²
Significant tornado parameter
1.3
Supercell composite
6.7

Open this sounding in Storm Lab

The text

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

987 
WFUS1 KSTL 101022 RRA
TORSTL
MOC019-101110-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
521 AM CDT WED JUN 10 1998

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  BOONE COUNTY IN CENTRAL MISSOURI

* UNTIL 610 AM CDT

* AT AT 517 AM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR
  INDICATED A TORNADO 10 MILES SOUTH OF COLUMBIA NEAR HIGHWAY 63...
  MOVING EAST NORTHEAST AT 35 MPH.

* LOCATIONS IN THE PATH...
  RURAL AREAS NORTH OF THE REGIONAL AIRPORT

TAKE COVER NOW TORNADOES ARE ESPECIALLY DANGEROUS AT NIGHT
BECAUSE THEY ARE HARD TO SEE. A BASEMENT OFFERS THE BEST
PROTECTION. IF NOT AVAILABLE...SEEK SHELTER IN A SMALL INTERIOR
ROOM ON THE LOWEST FLOOR. ABANDON MOBILE HOMES AND VEHICLES IN
FAVOR OF A STRONG BUILDING. AS A LAST RESORT...HIDE IN A DITCH OR
CULVERT AND COVER YOUR HEAD.

PEDIGO

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 9, 7:19 PM CDTSevere Thunderstorm WarningLSXIron, Reynolds46 min
Jun 9, 7:53 PM CDTSevere Thunderstorm WarningLSXSaint Francois32 min
Jun 9, 8:07 PM CDTSevere Thunderstorm WarningLSXIron33 min
Jun 9, 8:21 PM CDTSevere Thunderstorm WarningLSXSainte Genevieve49 min
Jun 10, 5:08 AM CDTSevere Thunderstorm WarningLSXBoone62 min
Jun 10, 6:03 AM CDTTornado WarningLSXGasconade, Montgomery, Osage62 min
Jun 10, 6:22 AM CDTTornado WarningLSXFranklin63 min

Nearby

Tornado Warnings in Missouri, 1998Every tornado warning in 1998Tornadoes in 1998

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.