Duvall, Illinois Weather Forecast Discussion

427
FXUS63 KILX 171700
AFDILX
Area Forecast Discussion...Updated Aviation
National Weather Service Lincoln IL
1200 PM CDT Wed Sep 17 2025
.KEY MESSAGES...
- Hot and dry weather will continue until Friday, with daytime
  highs topping out in the upper 80s to lower 90s.
- A slow moving upper level low will bring chances (20 to 40
  percent) for showers and thunderstorms Friday night through
  early next week, along with a slight decrease in temperatures.
  Precipitation looks to be generally light.
&&
.DISCUSSION...
Issued at 204 AM CDT Wed Sep 17 2025
Dry and hot conditions continue yet again today and tomorrow. Light,
east winds will be in place, which should help mitigate the fire
danger. This pattern will hold until a slow moving upper wave starts
to break down the ridging as we go into Friday. This upper wave will
bring daily chances for showers and thunderstorms through the
start of the new week. Highs will be around the mid 80s to low
90s through Saturday. We could see some slightly cooler
temperatures to start out the new week, with highs in the low to
upper 80s beginning Sunday. Lows will stay mainly in the 60s for
the next week. The Climate Prediction Center continues to
advertise a 60-70% chance for above normal temperatures through
the end of September. For reference, normal temperatures by the
last day of September should be in the middle 70s.
With these daily chances for rain, the rainfall amounts will not be
impressive. Drought has effectively settled in across the forecast
area. What that means for central and southeastern IL: harder to get
any meaningful rainfall without a potent/impressive low pressure
system. There is generally a 20-40% chance of showers and
thunderstorms going into next week starting Friday. The greatest
probability for widespread showers and/or thunderstorms is on Sunday
night with a 30-40% chance. Despite the daily chances for rain,
there is only a 20-30% chance of more than an inch of rain from now
until 00z next Thursday (7pm Wednesday, 9/24) based off the LREF.
Copple
&&
.AVIATION...  (For the 18z TAFs through 18z Thursday Afternoon)
Issued at 1200 AM CDT Wed Sep 17 2025
VFR conditions under clear skies to high thin clouds will continue
for the next 24 hours. Winds N-E around 5 kts or less.
37
&&
.ILX WATCHES/WARNINGS/ADVISORIES...
None.
&&
$$

NWS ILX Office Area Forecast Discussion