Alert archive / Illinois / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 45, NWS St. Louis, MO

April 13, 1998Adams County, Brown County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 13, 1998, 3:20 PM CDT for Adams County, Brown County, Illinois. It was in force for 40 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
Apr 13, 1998, 3:20 PM CDT (20:20 UTC)
Expired
Apr 13, 1998, 4:00 PM CDT
In force
40 min
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Adams County, IL, Brown County, IL

The radar

The Lincoln radar (KILX), 140 km from the middle of the area, began a volume at 20:19 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.

IssuedProductOfficeLasted
Apr 13, 11:30 AM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 8.3 hours before the alert went out and 187 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, Davenport, at 12:00Z on 1998-04-13Temperature 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, Davenport, at 12:00Z on 1998-04-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 314 square meters per square second.19395878Sfc1 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
1802 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
314 m²/s²
0-3 km storm-relative helicity
307 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.

000 
TTAA00 KSTL 132020 RRA
SVRSTL
ILC001-009-132100-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
320 PM CDT MON APR 13 1998
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  400 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN WEST CENTRAL ILLINOIS
 
   ...EASTERN ADAMS COUNTY...BROWN COUNTY
 
AT 320 PM...RADAR INDICATED A SEVERE THUNDERSTORM JUST SOUTHEAST OF
QUINCY MOVING EAST AT 30 MPH. TOWNS IN THE PATH OF THE STORM ARE
KINGSTON AND MT STERLING.
 
THIS STORM PRODUCED DIME SIZE HAIL IN QUINCY AT 315 PM.
 
 
 
THIS STORM HAS A HISTORY OF DAMAGING HAIL. STAY INSIDE AND AWAY
FROM WINDOWS.
 
 
 
&

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, Apr 13, 10:40 AM CDT, 4 hours 40 minutes before
ILZ058>060-064-065-069-070-074-079-095>102-MOZ009-010-018-019-026-
027-034>036-041-042-047>052-059>065-072>075-084-085-099-132145-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1040 AM CDT MON APR 13 1998

THIS OUTLOOK COVERS THE COUNTY WARNING AREA OF THE NATIONAL WEATHER
SERVICE FORECAST OFFICE IN ST LOUIS.  AREAS INCLUDED ARE PORTIONS OF
NORTHEAST...CENTRAL...EAST CENTRAL AND SOUTHEAST MISSOURI AS WELL AS
WEST CENTRAL AND SOUTHWEST ILLINOIS.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
EVENING ACROSS THE REGION AS A STRONG UPPER LEVEL DISTURBANCE MOVES
ACROSS MISSOURI.

STORM SPOTTER ACTIVATION MAY BE REQUIRED LATER TODAY ACROSS
PORTIONS OF EAST M4ISSOURI.

BECHTOLD
Special weather statement, Apr 13, 10:40 AM CDT, 4 hours 40 minutes before
ILZ058>060-064-065-069-070-074-079-095>102-MOZ009-010-018-019-026-
027-034>036-041-042-047>052-059>065-072>075-084-085-099-132145-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1040 AM CDT MON APR 13 1998

THIS OUTLOOK COVERS THE COUNTY WARNING AREA OF THE NATIONAL WEATHER
SERVICE FORECAST OFFICE IN ST LOUIS.  AREAS INCLUDED ARE PORTIONS OF
NORTHEAST...CENTRAL...EAST CENTRAL AND SOUTHEAST MISSOURI AS WELL AS
WEST CENTRAL AND SOUTHWEST ILLINOIS.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
EVENING ACROSS THE REGION AS A STRONG UPPER LEVEL DISTURBANCE MOVES
ACROSS MISSOURI.

STORM SPOTTER ACTIVATION MAY BE REQUIRED LATER TODAY ACROSS
PORTIONS OF EAST M4ISSOURI.

BECHTOLD

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 13, 3:44 PM CDTSevere Thunderstorm WarningLSXPike46 min
Apr 13, 4:57 PM CDTTornado WarningLSXCalhoun48 min
Apr 13, 5:18 PM CDTTornado WarningLSXJersey, Macoupin42 min
Apr 13, 5:36 PM CDTTornado WarningLSXMadison54 min
Apr 13, 5:42 PM CDTTornado WarningLSXRandolph63 min
Apr 13, 6:04 PM CDTTornado WarningLSXMadison41 min
Apr 13, 6:12 PM CDTTornado WarningLSXMonroe, Saint Clair63 min
Apr 13, 6:25 PM CDTTornado WarningLSXBond65 min
Apr 13, 6:43 PM CDTTornado WarningLSXClinton, Washington62 min
Apr 13, 6:52 PM CDTTornado WarningLSXRandolph68 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.