142
FXUS63 KILX 182315
AFDILX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LINCOLN IL
615 PM CDT SAT APR 18 2026
KEY MESSAGES
- LIGHT WINDS, CLEAR SKIES, AND TEMPERATURES DROPPING BELOW 36
DEGREES OVERNIGHT TONIGHT WILL RESULT IN FROST DEVELOPMENT
OVER CENTRAL AND SOUTHEASTERN IL TONIGHT. A FROST ADVISORY IS
IN EFFECT FROM 1AM TO 8AM TONIGHT/TOMORROW MORNING. TAKE
PRECAUTIONS FOR SENSITIVE VEGETATION.
- TEMPERATURES DROPPING AT OR BELOW FREEZING TOMORROW NIGHT,
RESULTING IN A FREEZE WATCH FOR TOMORROW NIGHT. TAKE
PRECAUTIONS FOR SENSITIVE VEGETATION.
- DAYTIME TEMPERATURES WILL REBOUND INTO THE UPPER 70S TO MID
80S BY MID WEEK AHEAD OF THE NEXT LOW PRESSURE SYSTEM LATE
WEEK.
DISCUSSION
ISSUED AT 210 PM CDT SAT APR 18 2026
[COLDER TEMPERATURES] --- THE MAIN CONCERN IN THE NEAR TERM IS
THE FROST POTENTIAL TONIGHT AND THE FROST/FREEZE POTENTIAL FOR
SUNDAY NIGHT. TEMPERATURES TONIGHT WILL DROP DOWN TO 33-38
DEGREES, WITH CLEAR SKIES AND LIGHT WINDS. THAT SUPPORTS THE
DEVELOPMENT OF FROST OVERNIGHT TONIGHT, SO A FROST ADVISORY HAS
BEEN ISSUED. TOMORROW NIGHT HAS A 40-60% CHANCE OF BELOW 32
DEGREES FOR LOWS ALONG/NORTHEAST OF A BEARDSTOWN TO TERRE HAUTE
LINE, BASED OFF THE HREF. A FREEZE WATCH HAS BEEN ISSUED FOR
TOMORROW NIGHT. BEING IN THE GROWING SEASON NOW, PRECAUTIONS
SHOULD BE TAKEN TO PROTECT SENSITIVE VEGETATION TONIGHT AND
TOMORROW NIGHT.
[TEMPERATURES REBOUND] --- COOL TEMPERATURES TODAY AND TOMORROW WILL
BE REINFORCED FOR MONDAY WITH A SECONDARY COLD FRONT MOVING THROUGH
DURING THE DAY SUNDAY. TEMPERATURES DURING THE DAY THROUGH MONDAY
WILL BE SLIGHTLY BELOW NORMAL, UPPER 50S TO LOW 60S. WINDS WILL
BECOME SOUTHERLY LATE MONDAY AND WILL INCREASE, BRINGING WAA BACK
INTO CENTRAL AND SOUTHEASTERN IL. BY TUESDAY, TEMPERATURES WILL HAVE
REBOUNDED TO ABOVE NORMAL, UPPER 70S TO MID 80S, FOR TUESDAY INTO
FRIDAY AHEAD OF THE NEXT COLD FRONTAL PASSAGE LATE WEEK.
[PRECIPITATION] --- FOR THE EXTENDED PERIOD, THE FORECAST IS WIDELY
DRY THROUGH THE FIRST HALF OF THE NEW WEEK. THERE LOOKS TO BE
ANOTHER POTENT LOW PRESSURE SYSTEM MOVE THROUGH LATE WEEK. IT COULD
BRING MORE RAINFALL AND THUNDERSTORMS. AT THIS TIME, SEVERE RISK
ISN'T CLEAR, BUT THE CSU MACHINE LEARNING SUGGESTS A 5% RISK FOR
SEVERE WEATHER. WE WILL CONTINUE TO MONITOR AS WE ENTER THE NEW
WEEK.
AVIATION /00Z TAFS THROUGH 00Z MONDAY/
ISSUED AT 615 PM CDT SAT APR 18 2026
VFR CONDITIONS WILL PREVAIL THE NEXT 24 HOURS, WITH A FEW
PERIODS OF SCATTERED CLOUDS NEAR 10KFT. STRONG NORTHWEST WINDS
WILL DROP OFF QUICKLY EARLY THIS EVENING, BUT WILL BEGIN TO GUST
TO AROUND 25 KNOTS AGAIN BY MIDDAY SUNDAY.
ILX WATCHES/WARNINGS/ADVISORIES
FROST ADVISORY FROM 1 AM TO 8 AM CDT SUNDAY FOR ILZ027>031-
036>038-040>057-061>063-066>068-071>073.
KEY MESSAGES...COPPLE
DISCUSSION...COPPLE
AVIATION...GEELHART
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