121
FXUS63 KILX 140415
AFDILX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LINCOLN IL
1115 PM CDT THU AUG 13 2020
SYNOPSIS
ISSUED AT 318 PM CDT THU AUG 13 2020
A STATIONARY BOUNDARY STILL SITTING ACROSS SOUTHERN ILLINOIS WILL
CONTINUE TO PROVIDE THE FOCUS FOR SHOWERS AND THUNDERSTORMS
ACROSS SOUTHEAST ILLINOIS TONIGHT THROUGH TOMORROW. OVERNIGHT LOWS
WILL DROP BACK INTO THE 60S, WHILE AFTERNOON TEMPERATURES
TOMORROW WILL CLIMB BACK INTO THE MIDDLE TO UPPER 80S.
UPDATE
ISSUED AT 742 PM CDT THU AUG 13 2020
LINGERING STATIONARY BOUNDARY REMAINS TO OUR SOUTH THIS EVENING.
SHOWERS AND SCATTERED THUNDERSTORMS REMAIN NEAR AND SOUTH OF
OLNEY/LAWRENCEVILLE AS A WEAK UPPER WAVE MOVES INTO THE LOWER OHIO
VALLEY. NOT MUCH CHANGE EXPECTED ACROSS THIS REGION OVERNIGHT,
WHILE THE NORTHERN CWA REMAINS UNDER THE INFLUENCE OF HIGH
PRESSURE CENTERED NORTH OF THE GREAT LAKES. FORECAST IS GENERALLY
ON TRACK AND ONLY MINOR ADJUSTMENTS HAVE BEEN MADE.
SHORT TERM
(THIS EVENING THROUGH FRIDAY)
ISSUED AT 318 PM CDT THU AUG 13 2020
A STATIONARY BOUNDARY STILL REMAINS IN SOUTHERN IL AND WILL STAY
AS THE FOCUS FOR SLOW MOVING SHOWERS AND THUNDERSTORMS ACROSS
SOUTHEAST IL TONIGHT AND AGAIN TOMORROW. TEMPERATURES TONIGHT WILL
FALL INTO THE MIDDLE 60S UP NORTH WHERE THERE WILL BE FEWER
CLOUDS, BUT ONLY DROP INTO THE UPPER 60S ACROSS THE SOUTHEAST
WHERE THERE WILL BE MORE CLOUDS. WARM AND MUGGY CONDITIONS ARE
EXPECTED TOMORROW WITH AFTER HIGHS REACHING THE MIDDLE TO UPPER
80S.
LONG TERM
(FRIDAY NIGHT THROUGH THURSDAY)
ISSUED AT 318 PM CDT THU AUG 13 2020
THE STATIONARY FRONT WILL FINALLY WASH OUT TOMORROW NIGHT, LEAVING
THE AREA WITH DRY WEATHER FOR FRIDAY NIGHT. HOWEVER, A COLD FRONT
WILL APPROACH THE AREA SATURDAY AND BRING A CHANCE OF SHOWERS AND
THUNDERSTORMS TO CENTRAL ILLINOIS, BUT MAINLY NORTHWEST OF I-55.
THERE IS A SLIGHT CHANCE THAT SOME OF THE PRECIP COULD REACH EAST
OF THERE, BUT MODELS ARE SHOWING A WEAKENING TREND AS THE FRONT
MOVES TO THE EAST INTO THE EVENING HOURS. SO, SAT NIGHT FORECAST
IS FOR DRY WEATHER WITH THE BEST CHANCE OF ANY PRECIP BEING WELL
NORTH OF THE AREA. BEYOND THIS, THE REMAINDER OF THE EXTENDED
PERIOD CALLS FOR DRY CONDITIONS AND TEMPS COOLING DOWN INTO THE
UPPER 70S BY TUE THROUGH THUR OF NEXT WEEK. OVERNIGHT LOWS THROUGH
THE PERIOD WILL BE MUCH COOLER, REACHING INTO THE 50S.
AVIATION
(FOR THE 06Z TAFS THROUGH 06Z FRIDAY NIGHT)
ISSUED AT 1115 PM CDT THU AUG 13 2020
VFR CONDITIONS EXPECTED TO GENERALLY PREVAIL. A FEW CLOUDS AROUND
4,000 FEET HAVE RECENTLY DEVELOPED, AND SHOULD PICK UP AGAIN LATE
FRIDAY MORNING WITH DIURNAL HEATING. HOWEVER, THAT WOULD PROBABLY
BE MORE OF AN IMPACT ALONG THE KSPI-KCMI CORRIDOR.
ILX WATCHES/WARNINGS/ADVISORIES
NONE.
UPDATE...GEELHART
SYNOPSIS...AUTEN
SHORT TERM...AUTEN
LONG TERM...AUTEN
AVIATION...GEELHART
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