Alert archive / Illinois / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 347, NWS St. Louis, MO

November 10, 1998Calhoun County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Nov 10, 1998, 3:29 AM CST for Calhoun County, Illinois. It was in force for 61 min. 3 reports 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: Nov 10, 1998, 3:29 AM CST (09:29 UTC)
Expired: Nov 10, 1998, 4:30 AM CST
In force: 61 min
Issued by: NWS St. Louis, MO
Area: Whole counties

County Calhoun County, IL

The radar

The St Louis radar (KLSX), 52 km from the middle of the area, began a volume at 09:29 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
Nov 10, 3:45 AM CST	Thunderstorm Wind 56	Kampsville, IL
Nov 10, 3:45 AM CST	Thunderstorm Wind 56	Hardin, IL
Nov 10, 3:45 AM CST	Thunderstorm Wind 56	Brussels, IL

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
Nov 10, 1:15 AM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 9.5 hours before the alert went out and 208 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 550 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 561 m²/s²
0-3 km storm-relative helicity: 703 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

589 
WUUS1 KSTL 100932 RRA
SVRSTL
ILC013-MOC099-183-189-221-510-101030-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
329 AM CST TUE NOV 10 1998

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CALHOUN COUNTY IN SOUTHWESTERN ILLINOIS
  JEFFERSON COUNTY IN EAST CENTRAL MISSOURI
  ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI
  ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI
  ST. LOUIS CITY IN EAST CENTRAL MISSOURI
  WASHINGTON COUNTY IN EAST CENTRAL MISSOURI

* UNTIL 430 AM CST

* AT 326 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS QUINCY SOUTH TO LOUSIANA...TROY...
  WASHINGTON AND STEELVILLE... MOVING EAST AT 50 MPH.

* LOCATIONS THAT WILL BE AFFECTED...
  POTOSI
  HILLSBORO
  WENTZVILLE
  ST CHARLES
  HARDIN
  CHESTERFIELD
  CLAYTON



THE PRIMARY SEVERE WEATHER THREAT IS DAMAGING WINDS. MOVE QUICKLY
TO A STURDY BUILDING AND STAY AWAY FROM DOORS AND WINDOWS.

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

GKS/FG

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 10, 1:42 AM CST	Tornado Warning	LSX	Calhoun, Pike	48 min
Nov 10, 3:08 AM CST	Severe Thunderstorm Warning	LSX	Adams, Brown, Pike	62 min
Nov 10, 3:45 AM CST	Severe Thunderstorm Warning	LSX	Greene, Jersey	65 min
Nov 10, 4:10 AM CST	Severe Thunderstorm Warning	LSX	Macoupin, Madison	65 min
Nov 10, 4:10 AM CST	Severe Thunderstorm Warning	LSX	Monroe, Saint Clair	65 min
Nov 10, 4:38 AM CST	Severe Thunderstorm Warning	LSX	Bond, Montgomery	62 min
Nov 10, 5:12 AM CST	Severe Thunderstorm Warning	LSX	Fayette	63 min

Nearby

Severe Thunderstorm Warnings in Illinois, 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.