Alert archive / Missouri / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 254, NWS St. Louis, MO

June 19, 1998Gasconade County, Osage County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 19, 1998, 10:04 PM CDT for Gasconade County, Osage County, Missouri. It was in force for 61 min. 1 report 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: Jun 19, 1998, 10:04 PM CDT (03:04 UTC)
Expired: Jun 19, 1998, 11:05 PM CDT
In force: 61 min
Issued by: NWS St. Louis, MO
Area: Whole counties

Counties Gasconade County, MO, Osage County, MO

The radar

The St Louis radar (KLSX), 91 km from the middle of the area, began a volume at 03:08 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

Time	Report	Where	Remark
Jun 19, 11:02 PM CDT	Hail 1.75	Owensville, 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jun 19, 6:45 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 3.1 hours before the alert went out and 254 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2710 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1096 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 201 m²/s²
Significant tornado parameter: 1.8
Supercell composite: 13.6

Open this sounding in Storm Lab

The text

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

607 
WUUS1 KSTL 200303 RRA
SVRSTL
MOC073-151-200405-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1004 PM CDT FRI JUN 19 1998

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GASCONADE COUNTY IN EASTERN MISSOURI
  OSAGE COUNTY IN CENTRAL MISSOURI

* UNTIL 1105 PM CDT

* AT 904 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  CLUSTER OF SEVERE THUNDERSTORMS FROM WESTPHALIA TO RICH
  FOUNTAIN... MOVING EAST AT 15 MPH.

* LOCATIONS THAT WILL BE AFFECTED...
  WESTPHAILIA
  LINN
  RICH FOUNTAIN
  MT STERLING
  OWENSVILLE



SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND GUSTS IN EXCESS OF 60
MPH...DAMAGING HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. MOVE
TO AN INTERIOR ROOM ON THE LOWEST FLOOR OR YOUR HOME OR BUSINESS.
HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE
WATER COVERS THE ROAD.

A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. SEVERE
THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING.

FG/DM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 10:30 PM CDT	Severe Thunderstorm Warning	LSX	Reynolds	50 min
Jun 19, 11:03 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Warren	62 min
Jun 19, 11:39 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	61 min
Jun 20, 1:38 AM CDT	Severe Thunderstorm Warning	LSX	Cole, Osage	62 min
Jun 20, 1:38 AM CDT	Severe Thunderstorm Warning	LSX	Moniteau	62 min
Jun 20, 3:34 AM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Louis	51 min
Jun 20, 4:39 AM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison	46 min
Jun 20, 12:00 PM CDT	Severe Thunderstorm Warning	LSX	Moniteau	45 min
Jun 20, 12:54 PM CDT	Flash Flood Warning	LSX	Moniteau	2 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 1998 Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.