421
FXUS63 KILX 170840
AFDILX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LINCOLN IL
240 AM CST FRI JAN 17 2025
KEY MESSAGES
- PATCHY FREEZING FOG LINGERING ACROSS EAST-CENTRAL AND
SOUTHEASTERN IL THIS MORNING AND SHOULD CLEAR OUT AS THE SUN
RISES.
- RAIN TO MOVE IN TONIGHT AHEAD OF A COLD FRONTAL PASSAGE, WHICH
WILL ALSO USHER IN MUCH COLDER TEMPERATURES BEHIND IT.
- WIND CHILLS BELOW -10 DEGREES ARE BEING WATCHED FOR SUNDAY
MORNING TO WEDNESDAY NIGHT. THERE IS HIGH CONFIDENCE (60-90%
CHANCE) IN THESE EXTREME COLD VALUES.
DISCUSSION
ISSUED AT 240 AM CST FRI JAN 17 2025
THERE IS SOME LOCALLY DENSE, PATCHY FREEZING FOG OUT THERE THIS
MORNING, FOCUSED IN EAST-CENTRAL AND SOUTHEASTERN IL. THIS COULD
CAUSE THE MORNING COMMUTE IN THESE AREAS TO BE SLIPPERY IN SPOTS,
ESPECIALLY ON ELEVATED SURFACES (SUCH AS BRIDGES). AS THE SUN RISES
HIGHER IN THE SKY, IT SHOULD START DISSIPATING. TODAY WILL SEE HIGHS
IN THE MID TO UPPER 40S, THE WARMEST IT HAS BEEN IN AWHILE AND WILL
BE FOR A LITTLE WHILE LONGER.
TONIGHT, A COLD FRONT WILL MAKE ITS WAY THROUGH THE REGION. THIS
FRONT WILL BRING PRIMARILY RAIN TO CENTRAL AND SOUTHEASTERN IL
TONIGHT. SOME SNOW FLAKES MAY START MIXING IN AS IT EXITS THE AREA,
WHERE IT GETS COLDER BEHIND THE FRONT. ACCUMULATIONS SHOULD BE
NEGLIGIBLE TO A DUSTING FROM THE LITTLE BIT OF SNOW THAT MAY FALL.
THE HIGHEST RAINFALL AMOUNTS WILL BE IN THE SOUTHEASTERN PORTION OF
THE CWA WITH AMOUNTS UPWARDS OF HALF AN INCH.
BEHIND THE COLD FRONT, A HIGH PRESSURE SYSTEM TAKES OVER AND ARCTIC
AIR WILL SPILL INTO THE STATE. IT WILL BE FRIGID INTO THE NEW WEEK.
HIGHS WILL ONLY GET TO UPPER SINGLE DIGITS TO LOW TEENS, WITH LOWS
BELOW ZERO, SUNDAY THROUGH TUESDAY. WIND CHILLS ARE TO GET BELOW -10
DEGREES FOR MUCH OF THE CWA INTO WEDNESDAY MORNING. THERE IS HIGH
CONFIDENCE (60-90% CHANCE) IN THESE EXTREME COLD VALUES.
TEMPERATURES LOOK TO "REBOUND" TO THE LOW 30S BY THURSDAY NEXT WEEK.
WAYS TO PREPARE FOR THIS EXTREME COLD ARE TO BUNDLE UP WITH MULTIPLE
LAYERS, DRIP YOUR FAUCETS, AND BRING IN PETS FROM OUTSIDE.
COPPLE
AVIATION
(FOR THE 06Z TAFS THROUGH 06Z FRIDAY NIGHT)
ISSUED AT 1135 PM CST THU JAN 16 2025
ALL SITES EXCEPT CMI WILL BE VFR TO START WITH SCATTERED CIRRUS AT
ALL SITES. CMI WILL START WITH 5SM BR AND THEN CONTINUE UNTIL
MORNING WITH MVFR VIS OF 3-5SM. CIRRUS WILL BE PRESENT AT ALL
SITES THROUGH THE MORNING HRS AND INTO THE AFTERNOON. IN ADVANCE
OF THE NEXT WEATHER SYSTEM MID CLOUDS WILL ADVECT OVER SPI, DEC,
AND CMI. THEN, LOWER CLOUDS WILL ADVECT QUICKLY OVER THE TAFS
DURING THE EVENING HOURS AS RAIN MOVES OVER THE SITES. WILL KEEP
PIA DRY WITH CIGS OF 6KFT. BMI AND SPI WILL HAVE PRECIP STARTING
AT 03Z AND THEN AT 04Z FOR DEC AND CMI. CIGS FOR ALL 4 OF THESE
SITES WILL BE 3.5-4KFT. WINDS WILL BE LIGHT OVERNIGHT BUT BECOME
SOUTHERLY TOMORROW THROUGH THE DAY AND THEN SOUTHWEST TOMORROW
EVENING. WIND SPEEDS WILL BE LESS THAN 15KTS THROUGH MORNING BUT
THEN INCREASE FOR LATE MORNING THROUGH AFTERNOON, WITH GUSTS OVER
23KTS AT ALL SITES. BY EVENING PIA, BMI AND SPI WILL SEE SPEEDS
DECREASE, BUT DEC AND CMI WILL HAVE GUSTS AROUND 20KTS CONTINUING
INTO THE EVENING.
AUTEN
ILX WATCHES/WARNINGS/ADVISORIES
NONE.
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