Alert archive / Missouri / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 164, NWS St. Louis, MO

May 23, 1998Audrain County, Boone County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 23, 1998, 5:37 PM CDT for Audrain County, Boone County, Missouri. It was in force for 48 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: May 23, 1998, 5:37 PM CDT (22:37 UTC)
Expired: May 23, 1998, 6:25 PM CDT
In force: 48 min
Issued by: NWS St. Louis, MO
Area: Whole counties

Counties Audrain County, MO, Boone County, MO

The radar

The St Louis radar (KLSX), 129 km from the middle of the area, began a volume at 22:39 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
May 23, 5:55 PM CDT	Hail 0.75	Centralia, 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
May 23, 3:15 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 23, 5:30 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 10.6 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-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: 1719 J/kg
Mixed-layer CIN: -204 J/kg
Mixed-layer LCL: 1570 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 166 m²/s²
0-3 km storm-relative helicity: 214 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

698 
WUUS1 KSTL 232238 RRA
SVRSTL
MOC007-019-232325-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
537 PM CDT SAT MAY 23 1998

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN AUDRAIN COUNTY IN CENTRAL MISSOURI
  NORTHERN BOONE COUNTY IN CENTRAL MISSOURI

* UNTIL 625 PM CDT

* AT 535 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 10 MILES NORTH OF COLUMBIA... MOVING NORTHEAST
  AT 35 MPH.

* LOCATIONS THAT WILL BE AFFECTED...
  HALLSVILLE
  CENTRALIA

GOLFBALL SIZED HAIL WAS REPORTED 5 MILES NORTH OF COLUMBIA AT 536 PM

THIS STORM HAS A HISTORY OF DAMAGING HAIL. STAY INSIDE AND AWAY
FROM WINDOWS.

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

PEDIGO


&

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 4:10 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Osage	50 min
May 23, 4:29 PM CDT	Severe Thunderstorm Warning	LSX	Callaway	46 min
May 23, 5:12 PM CDT	Severe Thunderstorm Warning	LSX	Callaway	33 min
May 23, 5:30 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson	45 min
May 23, 5:34 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Montgomery	46 min
May 23, 5:59 PM CDT	Tornado Warning	LSX	Saint Charles, Saint Louis	51 min
May 23, 6:20 PM CDT	Tornado Warning	LSX	Pike	50 min
May 23, 6:24 PM CDT	Severe Thunderstorm Warning	LSX	Monroe	51 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.