Alert archive / Missouri / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 234, NWS St. Louis, MO

June 18, 1998Moniteau County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 18, 1998, 6:19 PM CDT for Moniteau County, Missouri. It was in force for 36 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, 6:19 PM CDT (23:19 UTC)
Expired: Jun 18, 1998, 6:55 PM CDT
In force: 36 min
Issued by: NWS St. Louis, MO
Area: Whole counties

County Moniteau County, MO

The radar

The Pleasant Hill radar (KEAX), 147 km from the middle of the area, began a volume at 23:22 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.

Issued	Product	Office	Lasted
Jun 18, 6:15 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 11.3 hours before the alert went out and 220 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: 1617 J/kg
Mixed-layer CIN: -157 J/kg
Mixed-layer LCL: 1094 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 247 m²/s²
0-3 km storm-relative helicity: 264 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.5

Open this sounding in Storm Lab

The text

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

270 
WUUS1 KSTL 182320 RRA
SVRSTL
MOC135-182355-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
619 PM CDT THU JUN 18 1998

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MONITEAU COUNTY IN CENTRAL MISSOURI

* UNTIL 655 PM CDT

* AT 619 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES SOUTH OF CALIFORNIA... MOVING EAST-
  NORTHEAST AT 40 MPH.

* LOCATIONS THAT WILL BE AFFECTED...
  HIGH POINT
  CALIFORNIA
  MCGIRK



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.



GLASS/TRUETT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 10:31 AM CDT	Severe Thunderstorm Warning	LSX	Moniteau	44 min
Jun 18, 10:46 AM CDT	Severe Thunderstorm Warning	LSX	Boone	49 min
Jun 18, 11:19 AM CDT	Severe Thunderstorm Warning	LSX	Audrain	46 min
Jun 18, 12:03 PM CDT	Severe Thunderstorm Warning	LSX	Knox	47 min
Jun 18, 12:14 PM CDT	Severe Thunderstorm Warning	LSX	Scotland	51 min
Jun 18, 12:14 PM CDT	Severe Thunderstorm Warning	LSX	Shelby	51 min
Jun 18, 2:47 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Osage	48 min
Jun 18, 3:30 PM CDT	Severe Thunderstorm Warning	LSX	Marion	50 min
Jun 18, 4:06 PM CDT	Severe Thunderstorm Warning	LSX	Knox, Scotland	64 min
Jun 18, 4:33 PM CDT	Severe Thunderstorm Warning	LSX	Clark	32 min
Jun 18, 4:55 PM CDT	Severe Thunderstorm Warning	LSX	Shelby	50 min
Jun 18, 5:06 PM CDT	Severe Thunderstorm Warning	LSX	Clark	34 min
Jun 18, 5:46 PM CDT	Severe Thunderstorm Warning	LSX	Boone	34 min
Jun 18, 6:25 PM CDT	Tornado Warning	LSX	Cole, Moniteau	35 min
Jun 18, 6:59 PM CDT	Tornado Warning	LSX	Cole	31 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.