Normal, Illinois 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

781
FXUS63 KILX 080815
AFDILX

Area Forecast Discussion
National Weather Service Lincoln IL
315 AM CDT Sun Jun 8 2025

.KEY MESSAGES...

- There is a slight risk for severe thunderstorms west of a Peoria
  to Springfield line for this afternoon into evening, and a
  marginal risk to the east of that same line.

- A dry stretch of weather is expected over central and southeast
  IL Monday into Thursday. Highs will warm into the mid to upper
  80s by Wednesday with south winds increasing the humidity.

- Canadian wildfire smoke will return Monday behind the exiting
  cold front. More hazy skies and vibrant sunsets with the start
  of the new work week.


&&

.DISCUSSION...
Issued at 315 AM CDT Sun Jun 8 2025

Another foggy morning, another rainy afternoon. The repeat button
has been pressed once more for today. The patchy dense fog should
erode as the sun rises, as it has the past few days. A cold front is
set to push through this afternoon, bringing a line of thunderstorms
that is expected to be severe. It looks to enter the NW part of the
CWA by 2-3pm (19-20z), where the best chance for all severe hazards
exists. As the line moves east, the severe threats lessens. The SPC
has a marginal risk for severe weather across the entire CWA, and a
slight risk west of a Peoria to Springfield line. The line will be
moving into an environment with weaker shear and eroding CAPE.
The better shear will be located behind the front. 2pm to 8pm
looks to be the best window for strong to severe storms. The front
will take its time moving the remaining showers and
thunderstorms. The entire area should be rain free by 12z Monday
morning.

A high pressure system settles into the Ohio Valley, beginning
Monday and lasting into Thursday. A period of drier weather is
expected during this period. Temperatures will warm into the 80s
for highs by Wednesday and should stay there into the weekend.
Lows will warm into the mid to upper 60s.

Canadian wildfire smoke will return Monday behind the exiting cold
front. The HRRR smoke model doesn`t show a strong signal for near
surface smoke, but late last week, it showed no near surface and
that is when we had our worst air quality. It does show decent
vertically integrated smoke, so we could see some more hazy skies
and vibrant sunsets with the start of the new work week.

The dry weather is only temporary. By Thursday afternoon, more rain
chances enter the forecast again through next weekend as a
disturbance or two traverse the region being fueled with moisture
from the Gulf.

Copple

&&

.AVIATION...  (For the 06z TAFs through 06z Sunday Night)
Issued at 1224 AM CDT Sun Jun 8 2025

Some light showers may linger over eastern Illinois to start the TAF
period before stronger subsidence puts an end to them by 07-08Z. Fog
has developed in west-central IL where skies have cleared and winds
are light. MVFR to IFR visibility reductions appear most likely west
of I-55, which would include KPIA, KSPI, and KBMI through around 12-
14Z. A cold front will bring showers and scattered thunderstorms to
the area later this afternoon into early evening. Confidence in
timing is still rather low, so TEMPO/PROB30 groups continue to
highlight these chances later today. Light winds overnight will
increase some by mid morning with speeds of 10-15 kts out of the
west ahead of the front.

NMA

&&

.ILX WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$