Alert archive / Illinois / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 234, NWS Paducah, KY

September 8, 1997Franklin County, Saline County, Illinois

NWS Paducah, KY issued this severe thunderstorm warning at Sep 8, 1997, 11:54 AM CDT for Franklin County, Saline County, Illinois. 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
Sep 8, 1997, 11:54 AM CDT (16:54 UTC)
Expired
Sep 8, 1997, 12:30 PM CDT
In force
36 min
Issued by
NWS Paducah, KY
Area
Whole counties

Counties Franklin County, IL, Saline County, IL

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 4.9 hours before the alert went out and 254 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 1997-09-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 568 joules per kilogram.LCLLFCEL10008507005003002001001 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 1997-09-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 110 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
568 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
768 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
110 m²/s²
0-3 km storm-relative helicity
181 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.

NWS Paducah, KY wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 8, 2:01 AM CDT, 9 hours 53 minutes earlier.

Area forecast discussion, Sep 8, 2:01 AM CDT, 9 hours 53 minutes before
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In the hours before

Special weather statement, Sep 8, 10:50 AM CDT, 1 hour 4 minutes before
ILZ075>078-080>094-INZ081-082-085>088-KYZ001>022-MOZ076-086-087-100-
107>112-114-091200-

THUNDERSTORM OUTLOOK...VALID UNTIL 700 AM TUESDAY
NATIONAL WEATHER SERVICE PADUCAH KY
1100 AM CDT MON SEP 8 1997

THUNDERSTORMS ARE LIKELY THIS AFTERNOON AND EARLY EVENING.  EXPECT STORM
CHANCES TO DECREASE TONIGHT FROM WEST TO EAST.  ISOLATED SEVERE WEATHER
IS POSSIBLE MAINLY UNTIL SUNSET AND SPOTTER ACTIVATION MAY BE NECESSARY.

A NEARLY STATIONARY FRONT ORIENTED WEST TO EAST AND CLOSE TO INTERSTATE
64 WILL BE THE FOCUS FOR STORMS.  A LOW PRESSURE CENTER WILL MOVE ALONG
THE FRONT TODAY AND BE ENHANCED BY AN AREA OF UPPER LEVEL ENERGY SWEEPING
THROUGH SOUTHEAST MISSOURI INTO THE LOWER OHIO VALLEY.  EXTENSIVE CLOUD
COVER AND WEAK SURFACE TO MID LEVEL WINDS WILL BE THE MAIN LIMITING
FACTORS TO STORM DEVELOPMENT AND ESPECIALLY SEVERE STORMS.

THE ATMOSPHERE REMAINED VERY MOIST.  LOCALLY HEAVY RAIN IS LIKELY WITH
ANY THUNDERSTORMS.  THE MAIN SEVERE xTHREAT...ALTHOUGH LIMITED...WILL BE
LARGE HAIL AND DOWNBURST WIND GUSTS.  STORMS WILL MOVE TO THE EAST AT
20 MPH OR LESS.

PAUL W
Special weather statement, Sep 8, 11:00 AM CDT, 54 minutes before
ILZ075>078-080>094-INZ081-082-085>088-KYZ001>022-MOZ076-086-087-100-
107>112-114-091200-

THUNDERSTORM OUTLOOK...VALID UNTIL 700 AM TUESDAY
NATIONAL WEATHER SERVICE PADUCAH KY
1100 AM CDT MON SEP 8 1997

THUNDERSTORMS ARE LIKELY THIS AFTERNOON AND EARLY EVENING.  EXPECT STORM
CHANCES TO DECREASE TONIGHT FROM WEST TO EAST.  ISOLATED SEVERE WEATHER
IS POSSIBLE MAINLY UNTIL SUNSET AND SPOTTER ACTIVATION MAY BE NECESSARY.

A NEARLY STATIONARY FRONT ORIENTED WEST TO EAST AND CLOSE TO INTERSTATE
64 WILL BE THE FOCUS FOR STORMS.  A LOW PRESSURE CENTER WILL MOVE ALONG
THE FRONT TODAY AND BE ENHANCED BY AN AREA OF UPPER LEVEL ENERGY SWEEPING
THROUGH SOUTHEAST MISSOURI INTO THE LOWER OHIO VALLEY.  EXTENSIVE CLOUD
COVER AND WEAK SURFACE TO MID LEVEL WINDS WILL BE THE MAIN LIMITING
FACTORS TO STORM DEVELOPMENT AND ESPECIALLY SEVERE STORMS.

THE ATMOSPHERE REMAINED VERY MOIST.  LOCALLY HEAVY RAIN IS LIKELY WITH
ANY THUNDERSTORMS.  THE MAIN SEVERE THREAT...ALTHOUGH LIMITED...WILL BE
LARGE HAIL AND DOWNBURST WIND GUSTS.  STORMS WILL MOVE TO THE EAST AT
20 MPH OR LESS.

PAUL W

The office that day

Everything else NWS Paducah, KY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 8, 3:03 PM CDTFlash Flood WarningPAHFulton117 min
Sep 8, 5:55 PM CDTFlash Flood WarningPAHDaviess95 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1997Every severe thunderstorm warning in 1997

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.