796
FXUS63 KILX 171134
AFDILX
AREA FORECAST DISCUSSION...UPDATED AVIATION
NATIONAL WEATHER SERVICE LINCOLN IL
534 AM CST TUE DEC 17 2024
KEY MESSAGES
- ANOTHER ROUND OF RAIN AND SNOW MOVES IN TONIGHT. THE BEST CHANCE
FOR SNOW IS NEAR AND NORTH OF I-72, WITH A 20-40% CHANCE OF 0.1
INCH OF SNOW NORTH OF I-74.
- TEMPERATURES SEASONABLE, THEN MUCH COLDER LATE THIS WEEK INTO
THE WEEKEND.
- A DUSTING OF SNOW IS POSSIBLE THURSDAY EVENING/NIGHT. THERE IS A
20-50% OF 0.1 INCH NORTH OF A MACOMB TO CHAMPAIGN LINE.
DISCUSSION
ISSUED AT 230 AM CST TUE DEC 17 2024
THIS MORNING IS A CHANGE OF PACE. THERE ISN'T ANY DENSE FOG BEING
REPORTED OR ANY PRECIPITATION FALLING. IT IS A BEAUTIFUL MORNING,
WITH CLEAR SKIES (EXCEPT IN FAR SE IL), AND LIGHT WINDS. HOWEVER,
THIS WON'T LAST. HIGHS TODAY IN UPPER 40S TO LOW 50S. BY LATE THIS
EVENING, ANOTHER UPPER WAVE WILL BRING ANOTHER ROUND OF
PRECIPITATION TO CENTRAL IL OVERNIGHT THROUGH MUCH OF WEDNESDAY AND
START A COOLING PATTERN. THE P-TYPE COULD BE TRICKY. P-TYPE MAY
SWITCH AS TEMPERATURES TONIGHT ARE RIDING THE FREEZING LINE. NEAR
AND SOUTH OF I-72 SHOULD REMAIN ALL RAIN WITH LOWS IN THE MID 30S TO
NEAR 40. THE BEST CHANCE FOR SNOW IS NEAR AND NORTH OF I-72, WITH
A 20-40% CHANCE OF 0.1 INCH OF SNOW NORTH OF I-74, BEFORE WARMING
ABOVE FREEZING. QPF ISN'T MUCH, MAYBE A FEW HUNDREDTHS TO A TENTH
OF AN INCH.
A COLD FRONT ASSOCIATED WITH A STRONG UPPER SHORT WAVE WILL BRING
YET ANOTHER ROUND OF PRECIPITATION TO CENTRAL IL. THIS TIME BEING
MAINLY SNOW BUT THERE COULD BE AN ISOLATED BRIEF PERIOD OF A
RAIN/SNOW MIX. THE COVERAGE LOOKS TO BE NEAR AND NORTH OF I-72 FOR
THIS ROUND. SNOW ACCUMULATIONS APPEAR TO BE MINIMAL. THE LREF 00Z.17
SHOWS 20-50% OF 0.1 INCH NORTH OF A MACOMB TO CHAMPAIGN LINE. BEHIND
THIS COLD FRONT, COLDER TEMPERATURES (BELOW NORMAL) ARE EXPECTED TO
MOVE INTO THE REGION.
THE WEEKEND WILL BE DRY, GIVING US A WELL DESERVED BREAK. ON THE
FLIP SIDE, COLDER TEMPERATURES TAKE HOLD. AFTER THE COLD FRONT ON
THURSDAY, HIGHS DROP INTO THE LOW TO MID 30S AND LOWS IN THE UPPER
TEENS FOR THE WEEKEND. IT LOOKS LIKE TEMPERATURES WILL REBOUND TO
POSSIBLY THE 40S BY MID WEEK, LEADING TO AN ABOVE NORMAL CHRISTMAS.
TYPICAL AVERAGE TEMPS FOR CHRISTMAS IN CENTRAL IL IS UPPER 20S AND
LOW 30S (AROUND FREEZING) FOR SOUTHEASTERN IL. THE DETERMINISTIC
MODELS ARE ALSO HINTING AT A WEAK SYSTEM, BRINGING MORE
PRECIPITATION AROUND THE MONDAY/TUESDAY TIMEFRAME.
COPPLE
AVIATION
(FOR THE 12Z TAFS THROUGH 12Z WEDNESDAY MORNING)
ISSUED AT 534 AM CST TUE DEC 17 2024
VFR CONDITIONS WILL PREVAIL THROUGH MUCH OF THE DAYTIME HOURS.
OVERNIGHT TONIGHT, MORE RAIN WILL MOVE THROUGH CENTRAL IL. FOR THE
MOST PART, CEILINGS AND VIS SHOULD REMAIN VFR, BUT A HEAVIER SHOWER
COULD RESULT IN LOWERED CEILINGS AND/OR VIS FOR A BRIEF PERIOD.
COPPLE
ILX WATCHES/WARNINGS/ADVISORIES
NONE.
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