Alert archive / Missouri / Tornado Warnings in 1998

Tornado Warning 90, NWS St. Louis, MO

June 18, 1998Reynolds County, Missouri

NWS St. Louis, MO issued this tornado warning at Jun 18, 1998, 10:10 PM CDT for Reynolds County, Missouri. It was in force for 65 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 18, 1998, 10:10 PM CDT (03:10 UTC)
Expired
Jun 18, 1998, 11:15 PM CDT
In force
65 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Reynolds County, MO

The radar

The St Louis radar (KLSX), 151 km from the middle of the area, began a volume at 03:11 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 18, 6:15 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 3.2 hours before the alert went out and 256 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 1998-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3542 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 00:00Z on 1998-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 126 square meters per square second.19395878Sfc1 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
3542 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
1049 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
126 m²/s²
0-3 km storm-relative helicity
144 m²/s²
Significant tornado parameter
2.1
Supercell composite
12.4

Open this sounding in Storm Lab

The text

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

661 
WFUS1 KSTL 190311 RRA
TORSTL
MOC179-190415-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1010 PM CDT THU JUN 18 1998

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  REYNOLDS COUNTY IN SOUTHEASTERN MISSOURI

* UNTIL 1115 PM CDT

* AT 1010 PM... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO NEAR GLADDEN IN DENT COUNTY... MOVING EAST AT 40 MPH.

* LOCATIONS IN THE PATH...
  OATES
  BLACK
  JOHNSONS SHUT INS STATE PARK

A TORNADO IS ON THE GROUND IN YOU ARE IN THE PATH...MOVE
IMMEDIATELY TO A SUBSTANTIAL STRUCTURE NOW FOR PROTECTION. A
BASEMENT OFFERS THE BEST SHELTER. YOUR LIFE AND THE LIVES OF THOSE
AROUND YOU MAY DEPEND ON YOUR ACTIONS.

GLASS/TRUETT

&

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 18, 7:01 PM CDTSevere Thunderstorm WarningLSXCallaway49 min
Jun 18, 7:09 PM CDTSevere Thunderstorm WarningLSXPike46 min
Jun 18, 7:14 PM CDTTornado WarningLSXOsage36 min
Jun 18, 7:28 PM CDTSevere Thunderstorm WarningLSXLincoln, Montgomery, Warren52 min
Jun 18, 8:45 PM CDTSevere Thunderstorm WarningLSXCrawford, Franklin, Washington50 min
Jun 18, 9:07 PM CDTSevere Thunderstorm WarningLSXJefferson48 min
Jun 18, 9:25 PM CDTSevere Thunderstorm WarningLSXSainte Genevieve, Saint Francois35 min
Jun 18, 10:25 PM CDTSevere Thunderstorm WarningLSXIron65 min
Jun 18, 10:59 PM CDTSevere Thunderstorm WarningLSXMadison, Saint Francois46 min
Jun 18, 11:10 PM CDTSevere Thunderstorm WarningLSXSainte Genevieve50 min
Jun 18, 11:14 PM CDTSevere Thunderstorm WarningLSXReynolds51 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; radar from the NEXRAD Level II archive.