150
FXUS63 KILX 282301
AFDILX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LINCOLN IL
601 PM CDT THU MAY 28 2026
KEY MESSAGES
- NO MAJOR WEATHER SYSTEMS ARE EXPECTED TO AFFECT CENTRAL AND
SOUTHEAST ILLINOIS THROUGH AT LEAST THE MIDDLE OF NEXT WEEK.
THEREFORE THE SEVERE WEATHER RISK WILL REMAIN VERY LOW (LESS
THAN A 5% CHANCE) THROUGH NEXT THURSDAY.
DISCUSSION
ISSUED AT 245 PM CDT THU MAY 28 2026
THE 19Z/2 PM SURFACE ANALYSIS SHOWS 1027 MB HIGH PRESSURE OVER
LAKE SUPERIOR AND NORTHERN MI AND RIDGING INTO IL. A WEAK COLD
FRONT HAD PUSHED SW OF CWA NEARING THE MO/IL BORDER. BANDS OF
CIRRUS CLOUDS WERE OVER CENTRAL AND SOUTHERN IL WITH PARTLY TO
MOSTLY SUNNY SKIES OVER CWA. EAST TO NE WINDS 7-15 MPH AND
GUSTS UP TO AROUND 20 MPH WITH WARM TEMPERATURES OF 83-89F.
DEWPOINTS WERE IN THE MID 50S TO LOWER 60S IN CENTRAL IL AND MID
60S IN SOUTHEAST IL SOUTH OF I-70.
AN OMEGA BLOCK PATTERN WILL PREVAIL ACROSS THE US THROUGH THE
MIDDLE OF NEXT WEEK, FEATURING STRONG UPPER LOWS/TROFS OVER THE
WESTERN STATES AND NEW ENGLAND WITH AN UPPER LEVEL RIDGE
SANDWICHED BETWEEN THEM OVER THE MIDWEST/IL. SURFACE HIGH
PRESSURE OVER THE WESTERN GREAT LAKES WILL SHIFT INTO THE
SOUTHERN GREAT LAKES FRIDAY. ANOTHER CANADIAN HIGH PRESSURE WILL
SETTLE SOUTHWARD FROM HUDSON BAY INTO THE GREAT LAKES AND OHIO
VALLEY THIS WEEKEND AND INTO THE MID ATLANTIC STATES DURING
MIDDLE OF NEXT WEEK WHILE RIDGING INTO IL. SYNOPTIC SUBSIDENCE
FROM THE SURFACE AND UPPER LEVEL HIGH PRESSURE RIDGES WILL
KEEP MUCH OF THE AREA DRY DURING THE NEXT 7 DAYS. A BAND OF
MOISTURE SOUTH AND WEST OF IL MAY SEE ISOLATED TO SCATTERED
SHOWERS MOVE INTO SW AND WEST CENTRAL IL FRI NIGHT INTO SAT
MORNING WITH SLIGHT POPS FROM MACOMB TO JACKSONVILLE TO
EFFINGHAM SW. MORE MID/HIGH CLOUDS WILL SPREAD NE INTO CENTRAL
IL DURING FRIDAY AND CONTINUE FRI NIGHT AND SATURDAY WITH MOSTLY
CLOUDY SKIES. MORE CLOUD COVER AND PERSISTENT EAST TO NORTHEAST
FLOW WILL SEE A BIT COOLER TEMPERATURES NEXT FEW DAYS, INTO THIS
WEEKEND WITH HIGHS IN THE UPPER 70S/LOWER 80S. HIGHS IN THE
UPPER 70S TO MID 80S ARE ON TAP FROM MONDAY THROUGH NEXT
THURSDAY WHICH IS NEAR OR SLIGHTLY ABOVE NORMAL HIGHS FOR EARLY
JUNE.
THE CLIMATE PREDICTION CENTER (CPC) 8-14 DAY OUTLOOK FOR JUNE
5-11TH HAS A 50-60% CHANCE OF ABOVE NORMAL TEMPERATURES OVER
CENTRAL AND SOUTHEAST IL AND PRECIPITATION TRENDING NEAR NORMAL.
AVIATION /00Z TAFS THROUGH 00Z SATURDAY/
ISSUED AT 600 PM CDT THU MAY 28 2026
VFR CONDITIONS TO PREVAIL THE NEXT 24 HOURS, WITH SOME DIURNAL
CUMULUS AROUND 5KFT OR SO REDEVELOPING ON FRIDAY. MAIN AVIATION
IMPACT WILL BE WITH WINDS IN THE SHORT TERM, AS A LAKE BREEZE
PUSHES SOUTHWEST ACROSS CENTRAL ILLINOIS. NORTHEAST WINDS THIS
EVENING WILL GUST AROUND 20 KNOTS OR SO, BEFORE WINDS DIMINISH
TOWARD MIDNIGHT.
ILX WATCHES/WARNINGS/ADVISORIES
NONE.
KEY MESSAGES...07
DISCUSSION...07
AVIATION...GEELHART
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