241
FXUS63 KILX 070702
AFDILX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LINCOLN IL
202 AM CDT MON SEP 7 2026
KEY MESSAGES
- HEAT RETURNS MIDWEEK: HOT AND MUGGY CONDITIONS RETURN TUESDAY
AND WEDNESDAY. TEMPERATURES WILL TOP OUT IN THE 90S BOTH DAYS.
THERE IS A 50-80% CHANCE OF HEAT INDICES GREATER THAN 95
DEGREES SOUTH OF I-70 WEDNESDAY AFTERNOON.
- MIDWEEK STORM POTENTIAL: A PASSING FRONT BRINGS A 70-90%
CHANCE FOR SHOWERS AND THUNDERSTORMS WEDNESDAY INTO THURSDAY.
SPC HAS A MARGINAL (LEVEL 1 OF 5) RISK FOR SEVERE WEATHER
SOUTH OF A JACKSONVILLE TO HOOPESTON LINE.
DISCUSSION
ISSUED AT 202 AM CDT MON SEP 7 2026
TODAY HIGHS WILL BE IN THE 80S TO NEAR 90. TEMPERATURES WILL WARM
BACK UP INTO THE 90S TOMORROW AND WEDNESDAY AS THE UPPER RIDGING
BUILDS BACK EASTWARD WITH 850 MB TEMPERATURES OF 20-24C. MOISTURE
TRANSPORT WILL INCREASE INTO WEDNESDAY AHEAD OF A COLD FRONT
BRINGING SOUPY DEWPOINTS (70-75F) INTO THE CENTRAL PART OF THE
STATE. THERE IS A 50-80% CHANCE OF HEAT INDICES GREATER THAN 95
DEGREES SOUTH OF I-70 WEDNESDAY AFTERNOON, FROM THE LREF.
THE COLD FRONT WILL MOVE THROUGH ON WEDNESDAY AS THE RIDGE GETS
BROKEN DOWN BY AN UPPER LOW MOVING OVER CANADA. IT WILL CLEAR OUT
THE SWELTERING MID TO UPPER 90 TEMPERATURES, LEAVING HIGHS IN THE
LOW TO MID 80S BEFORE BUILDING BACK TO UPPER 80S TO LOW 90S FOR THE
WEEKEND.
THIS FRONT WILL BRING THE NEXT CHANCE FOR RAIN WEDNESDAY INTO
THURSDAY. CAMS ARE NOW WITHIN REACH OF WEDNESDAY MORNING. THE
NAMNEST AND THE RRFS ARE SHOWING A LINE OF SHOWERS & CONVECTION
ALONG THE FRONT ENTERING THE NORTHWEST AROUND 12Z WEDNESDAY. THE
RRFS SUGGESTS THE INITIAL LINE OF CONVECTION WILL DRY OUT DURING THE
DAY. THEN SOME REDEVELOPMENT IN THE SOUTHEAST IN THE EVENING,
POTENTIALLY TRAINING NEAR AND SOUTH OF I-70. PWATS IN THAT AREA ARE
FORECAST TO BE 2.0-2.5 INCHES. WPC HAS A MARGINAL RISK ERO SOUTH OF
I-72 AND SPC HAS ADDED A MARGINAL RISK FOR SEVERE WEATHER SOUTH
OF A JACKSONVILLE TO HOOPESTON LINE FOR WEDNESDAY. DAMAGING
WINDS ARE THE MOST LIKELY HAZARD WITH THE LINE OF STORMS.
ADDITIONAL LOW-END CHANCES EXIST FOR SHOWERS AND THUNDERSTORMS
THROUGH THE WEEKEND.
AVIATION /06Z TAFS THROUGH 06Z TUESDAY/
ISSUED AT 1203 AM CDT MON SEP 7 2026
HIGH-BASED CEILINGS ARE EXPECTED MUCH OF THE NIGHT, BEFORE
THINNING OUT. EASTERLY WINDS WILL GRADUALLY TREND MORE TOWARD
THE EAST-SOUTHEAST ON MONDAY, THOUGH REMAINING BELOW 10 KNOTS.
ILX WATCHES/WARNINGS/ADVISORIES
NONE.
KEY MESSAGES...COPPLE
DISCUSSION...COPPLE
AVIATION...GEELHART
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