049
FXUS63 KILX 041055
AFDILX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LINCOLN IL
555 AM CDT FRI SEP 4 2026
KEY MESSAGES
- AN EXTREME HEAT WARNING REMAINS IN EFFECT AREAWIDE TODAY AND
FOR PARTS OF THE AREA SATURDAY WITH DANGEROUS HEAT INDEX
VALUES BETWEEN 100 AND 110 DEGREES.
- THERE IS A VERY LOW CHANCE (10-15%) FOR AN ISOLATED SHOWER OR
THUNDERSTORM LATE THIS AFTERNOON AND EVENING.
DISCUSSION
ISSUED AT 147 AM CDT FRI SEP 4 2026
HEAT WILL CONTINUE TO BE OUR MAIN CONCERN OVER THE NEXT WEEK. AN
EXTREME HEAT WARNING REMAINS IN EFFECT AREAWIDE THROUGH FRIDAY. THE
EXTREME HEAT WARNING WILL BE MAINTAINED FOR THE SOUTHERN TIER OR TWO
OF COUNTIES (ROUGHLY RUSHVILLE TO ROBINSON SOUTH) WHERE PEAK INDICES
WILL LINGER NEAR OR ABOVE 105F, HOWEVER ELSEWHERE ISN'T EXACTLY
COOLING DOWN SIGNIFICANTLY. HEAT INDICES NORTH OF THE WARNING
REMAIN AROUND 100 DEGREES.
A BACKDOOR COLD FRONT WILL PUSH INTO THE AREA LATE SATURDAY
AFTERNOON, WHICH COULD BRING "RELIEF" SUNDAY AND MONDAY, WHERE HEAT
INDICES WILL BE IN THE LOW TO MID 90S, RATHER THAN OVER 100, AND
HIGHS IN THE UPPER 80S TO LOW 90S. THESE, SO-CALLED, COOLER
TEMPERATURES WILL WARM BACK UP TO MID TO UPPER 90S BY MID NEXT WEEK
BEFORE BACKING OFF AGAIN BY THE END OF THE WEEK.
WE WILL CONTINUE TO BE IN RECORD TERRITORY FOR TEMPERATURES AS THIS
EARLY SEPTEMBER HEAT WAVE PERSISTS. CHECK OUT THE CLIMATE SECTION
BELOW FOR MORE DETAILS.
THE SPC HAS REMOVED THE MARGINAL RISK FOR SEVERE WEATHER FOR CENTRAL
IL FOR TODAY. A ROGUE SHOWER OR THUNDERSTORM IS NOT OUT OF THE
QUESTION FOR THE DAY TODAY. HOWEVER, THE CHANCES ARE QUITE LOW (<
20%) AREAWIDE FOR ANY ACTIVITY. DESPITE DECENT CAPE VALUES, FORECAST
SOUNDINGS SHOW A VERY DRY PROFILE AND LOW BULK SHEAR VALUES. BEYOND
TODAY, THE NEXT POTENTIAL FOR ANY RAIN ACTIVITY COMES LATE NEXT WEEK
AS THE UPPER RIDGING PATTERN APPEARS TO BREAK DOWN.
AVIATION /12Z TAFS THROUGH 12Z SATURDAY/
ISSUED AT 555 AM CDT FRI SEP 4 2026
VFR CONDITIONS ARE EXPECTED THROUGH THE 12Z TAF PERIOD. LIGHT
WINDS OUT OF THE SOUTHWEST WILL BECOME MORE WESTERLY LATE THIS
MORNING. SOME HIGH BASED DIURNAL CUMULUS IS POSSIBLE THIS
AFTERNOON.
CLIMATE
ISSUED AT 1211 AM CDT FRI SEP 4 2026
RECORD HIGH TEMPERATURES THROUGH SATURDAY:
LOCATION FRI 9/4 SAT 9/5
======== ======== ========
BLOOMINGTON 100/1925 103/1899
CHAMPAIGN 100/1954 102/1899
CHARLESTON 98/1925 102/1954
DANVILLE 101/1954 102/1954
DECATUR 103/1913 104/1954
JACKSONVILLE 103/1899 104/1899
LINCOLN 102/1954 103/1954
OLNEY 103/1954 106/1925
PARIS 104/1954 105/1954
PEORIA 98/2015 104/1899
SPRINGFIELD 100/1954 99/1954
ILX WATCHES/WARNINGS/ADVISORIES
EXTREME HEAT WARNING UNTIL 7 PM CDT THIS EVENING FOR
ILZ027>031-036>038-041>046-053>057-063.
EXTREME HEAT WARNING UNTIL 7 PM CDT SATURDAY FOR ILZ040-
047>052-061-062-066>068-071>073.
KEY MESSAGES...COPPLE
DISCUSSION...COPPLE
AVIATION...COPPLE
CLIMATE...GEELHART
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