631
FXUS63 KDVN 232343
AFDDVN

Area Forecast Discussion
National Weather Service Quad Cities IA IL
643 PM CDT Sun Aug 23 2026

.KEY MESSAGES...

- Quiet weather and pleasant temperatures and humidity continue
  into Monday.

- Mainly dry this week with 20 to 40 percent chances of showers
  and storms Wednesday and again next Saturday.

&&

.SHORT TERM /THROUGH MONDAY/...
Issued at 200 PM CDT Sun Aug 23 2026

Nice late-August weather is expected through Monday with
seasonable temperatures and comfortable humidity. Expect lows in
the 50s tonight, and then a rebound into the upper 70s/low 80s
for Monday. Winds will remain light with high pressure in
control.

&&

.LONG TERM /MONDAY NIGHT THROUGH SUNDAY/...
Issued at 200 PM CDT Sun Aug 23 2026

Northwesterly flow aloft is forecast to continue through the
upcoming week. A storm system is forecast to pass to our north
and east Tuesday night through Wednesday night with 20 to 30
percent chances of showers and storms. Models show a slight
increase in moisture ahead of this storm system. Currently the
higher chances of precipitation are across northwest Illinois.
Rainfall amounts will be light with generally less than a tenth
of an inch expected. High temperatures on Wednesday will be
slightly warmer into the lower to mid 80s.

After Wednesday night, models show another shortwave topping
the western U.S. ridge and flattening the flow aloft to more
zonal. This system will begin to impact the area late Friday
night into Saturday, bringing more humid conditions and another
chance for precipitation.

&&

.AVIATION /00Z TAFS THROUGH 00Z TUESDAY/...
Issued at 643 PM CDT Sun Aug 23 2026

Largely VFR conditions are expected throughout the TAF period,
under light and variable winds. The only possible exception will
be late tonight as patchy fog could develop over the area. The
latest NBM probabilities of MVFR visibility reductions are
around 30-50% - highest around CID and BRL - so have decided to
use TEMPO groups for those two terminals. Some models are quite
bullish on fog tonight, with some going down to IFR visbys, but
confidence isn`t high enough to go that low at this time.

&&

.DVN WATCHES/WARNINGS/ADVISORIES...
IA...None.
IL...None.
MO...None.

&&

$$

SHORT TERM...Uttech
LONG TERM...Cousins/Uttech
AVIATION...Schultz