Alert archive / Illinois / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 287, NWS St. Louis, MO

June 29, 1998Greene County, Macoupin County, Montgomery County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 29, 1998, 5:42 PM CDT for Greene County, Macoupin County, Montgomery County, Illinois. It was in force for 63 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
Jun 29, 1998, 5:42 PM CDT (22:42 UTC)
Expired
Jun 29, 1998, 6:45 PM CDT
In force
63 min
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Greene County, IL, Macoupin County, IL, Montgomery County, IL

The radar

The St Louis radar (KLSX), 92 km from the middle of the area, began a volume at 22:43 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

TimeReportWhereRemark
Jun 29, 6:00 PM CDTThunderstorm Wind 55Farmersville, IL
Jun 29, 6:05 PM CDTThunderstorm Wind 55Carrollton, IL
Jun 29, 6:20 PM CDTThunderstorm Wind 55Hillsboro, 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 nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.7 hours before the alert went out and 149 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, Lincoln, IL at 12:00Z on 1998-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 1998-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 91 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2020 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
91 m²/s²
0-3 km storm-relative helicity
71 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.

704 
WUUS1 KSTL 292243 RRA
SVRSTL
ILC061-117-135-292345-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
542 PM CDT MON JUN 29 1998

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GREENE COUNTY IN WEST CENTRAL ILLINOIS
  MACOUPIN COUNTY IN SOUTHWESTERN ILLINOIS
  MONTGOMERY COUNTY ILLINOIS IN SOUTHWESTERN ILLINOIS

* UNTIL 645 PM CDT

* AT 538 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM DECATUR ILLINOIS TO 15 MILES
  NORTH OF CARROLTON ILLINOIS... MOVING SOUTH SOUTHEAST AT 40 TO 45
  MPH.

* LOCATIONS THAT WILL BE AFFECTED...
  WHITE HALL
  PALMYRA
  FARMERVILLE

DAMAGING WINDS WERE REPORTED OVER PARTS OF SAGAMON COUNTY BETWEEN
530 AND 540 PM CDT.

THIS STORM HAS A HISTORY OF 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.

RP/VA


&

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jun 29, 3:42 PM CDT, 2 hours before
ILZ064-069-070-074-079-100>102-MOZ061-063>065-292300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
342 PM CDT MON JUN 29 1998

...HEAT ADVISORY FOR PORTIONS OF EAST CENTRAL MISSOURI AND SOUTHWEST
ILLINOIS HAS EXPIRED...

A COLD FRONT ACROSS THE UPPER MIDWEST WILL MOVE SOUTHWARD THROUGH
MISSOURI LATE TONIGHT AND TUESDAY.  YOU CAN EXPECT SHOWERS AND
THUNDERSTORMS WITH THIS FRONT AS IT PASSES THROUGH THE AREA OVER THE
NEXT 24 HOURS.  IN TURN...A RELATIVELY COOLER AND LESS HUMID AIR MASS
WILL SETTLE OVER THE AREA LATE TUESDAY THROUGH WEDNESDAY. THUS...THE
HEAT ADVISORY FOR PORTIONS OF EAST CENTRAL MISSOURI AND SOUTHWEST
ILLINOIS...INCLUDING THE ST LOUIS METROPOLITAN AREA...WILL
BE ALLOWED TO EXPIRE.

METZE
Special weather statement, Jun 29, 3:42 PM CDT, 2 hours before
ILZ064-069-070-074-079-100>102-MOZ061-063>065-292300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
342 PM CDT MON JUN 29 1998

...HEAT ADVISORY FOR PORTIONS OF EAST CENTRAL MISSOURI AND SOUTHWEST
ILLINOIS HAS EXPIRED...

A COLD FRONT ACROSS THE UPPER MIDWEST WILL MOVE SOUTHWARD THROUGH
MISSOURI LATE TONIGHT AND TUESDAY.  YOU CAN EXPECT SHOWERS AND
THUNDERSTORMS WITH THIS FRONT AS IT PASSES THROUGH THE AREA OVER THE
NEXT 24 HOURS.  IN TURN...A RELATIVELY COOLER AND LESS HUMID AIR MASS
WILL SETTLE OVER THE AREA LATE TUESDAY THROUGH WEDNESDAY. THUS...THE
HEAT ADVISORY FOR PORTIONS OF EAST CENTRAL MISSOURI AND SOUTHWEST
ILLINOIS...INCLUDING THE ST LOUIS METROPOLITAN AREA...WILL
BE ALLOWED TO EXPIRE.

METZE

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 28, 7:51 PM CDTSevere Thunderstorm WarningLSXPike34 min
Jun 28, 8:59 PM CDTSevere Thunderstorm WarningLSXAdams36 min
Jun 29, 12:05 AM CDTFlash Flood WarningLSXAdams4 hr
Jun 29, 12:05 AM CDTFlash Flood WarningLSXBrown4 hr
Jun 29, 4:30 PM CDTSevere Thunderstorm WarningLSXAdams, Brown65 min
Jun 29, 4:51 PM CDTFlash Flood WarningLSXAdams, Brown3 hr
Jun 29, 5:04 PM CDTSevere Thunderstorm WarningLSXPike61 min
Jun 29, 6:19 PM CDTSevere Thunderstorm WarningLSXJersey46 min
Jun 29, 6:29 PM CDTSevere Thunderstorm WarningLSXBond, Fayette61 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1998Every 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.