963
FXUS63 KILX 291919
AFDILX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LINCOLN IL
219 PM CDT FRI MAY 29 2026
KEY MESSAGES
- NO MAJOR WEATHER SYSTEMS ARE EXPECTED TO AFFECT CENTRAL AND
SOUTHEAST ILLINOIS THROUGH THURSDAY. THE BEST CHANCE OF
SHOWERS AND ISOLATED THUNDERSTORMS WILL BE OVERNIGHT SUNDAY
NIGHT INTO EARLY MONDAY. TEMPERATURES WILL REMAIN ABOVE
NORMAL, WITH HIGHS IN THE LOW TO MID 80S THROUGH THE MIDDLE OF
NEXT WEEK, WITH MID TO UPPER 80S LATE NEXT WEEK.
DISCUSSION
ISSUED AT 215 PM CDT FRI MAY 29 2026
AN OMEGA BLOCK PATTERN CONTINUES ACROSS THE COUNTRY THROUGH THE
MIDDLE OF NEXT WEEK, WITH UPPER LEVEL LOWS/TROFS OVER THE
WESTERN STATES AND NEW ENGLAND/EAST COAST AND RIDGING OVER THE
HEARTLAND INCLUDING IL. DEEPER MOISTURE SOUTH AND WEST OF IL
OVER MO INTO WESTERN KY AND MID/WESTERN TN WILL KEEP BEST
CHANCES OF CONVECTION TO OUR SOUTH AND WEST THROUGH SUNDAY.
ISOLATED SHOWERS AND THUNDERSTORMS APPEARS TO STAY JUST SW AND
WEST OF CWA TONIGHT INTO SATURDAY EVENING. WE HAVE 20-30%
CHANCES OF CONVECTION OVER WEST CENTRAL CWA OVERNIGHT SAT NIGHT
INTO SUNDAY MORNING FROM GALESBURG TO SPI WEST, WITH HIGHER POPS
JUST WEST OF IL/MS RIVER. OUR BEST CHANCES OF CONVECTION IS
OVERNIGHT SUNDAY NIGHT WITH LIKELY POPS IN WEST CENTRAL IL
TAPERING TO 20-30% POPS IN EASTERN/NE CWA. POPS THEN DIMINISH
DURING MONDAY TO ISOLATED CHANCES.
LOWS OVERNIGHT IN THE LOWER 60S, WITH UPPER 50S IN PARTS OF EAST
CENTRAL IL. A BIT COOLER LOWS 55-60F SAT NIGHT WITH HIGHS THIS
IN THE LOW TO MID 80S SATURDAY AND MONDAY, WARMEST OVER THE IL
RIVER VALLEY. A BIT COOLER HIGHS SUNDAY IN THE UPPER 70S/LOWER
80S. UPPER LEVEL RIDGE TO BUILD STRONGER OVER IL AS 500 MB
HEIGHTS RISE TO AROUND 588 DECAMETERS TUE NIGHT/WED AND UPPER
RIDGE REMAINS OVER IL THROUGH MIDDLE OF NEXT WEEK KEEP IT WARM
AND DRY. EXTENDED MODELS SHOW CONVECTION CHANCES RETURNING NEXT
FRIDAY/SATURDAY.
THE CLIMATE PREDICTION CENTER (CPC) 8-14 DAY OUTLOOK FOR JUNE
6-12TH HAS 50-60% CHANCE OF ABOVE NORMAL TEMPERATURES OVER
CENTRAL/SE IL WITH PRECIPITATION TRENDING NEAR NORMAL (33-40%
BELOW NORMAL PCPN IN NORTHERN IL).
AVIATION /18Z TAFS THROUGH 18Z SATURDAY/
ISSUED AT 1245 PM CDT FRI MAY 29 2026
NEARBY UPPER LEVEL RIDGE AND WEAK SURFACE HIGH PRESSURE OVER
THE SOUTHERN GREAT LAKES AND OHIO RIVER VALLEY WILL KEEP VFR
CONDITIONS THROUGH 18Z/1 PM SATURDAY. FEW-SCT CUMULUS CLOUDS
WITH 5-7K FT BASES THIS AFTERNOON ESPECIALLY AT PIA, DEC AND
SPI) TO DISSIPATE AS DUSK. BROKEN CIRRUS CLOUDS 20-25K FT TO
CONTINUES TO STREAM OVER CENTRAL IL THROUGH SATURDAY MORNING.
ESE TO SE WINDS 5-10 KTS (GUSTS TO 15 KTS AT BMI) TO BE EAST
AROUND 5 KTS TONIGHT AND 7-12 KTS AFTER 14Z/9 AM SATURDAY.
ILX WATCHES/WARNINGS/ADVISORIES
NONE.
KEY MESSAGES...07
DISCUSSION...07
AVIATION...07
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