Marion, Iowa 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

292
FXUS63 KDVN 162324
AFDDVN

Area Forecast Discussion
National Weather Service Quad Cities IA IL
624 PM CDT Thu Jul 16 2026

.KEY MESSAGES...

- Hot and humid conditions continue through Saturday, with afternoon
  heat indices in the mid 90s to around 100F.

- Isolated to scattered afternoon/evening showers and storms
  through Saturday with Friday PM favored for the better
  coverage (30- 50%). The risk for severe weather is very low.

- Wildfire smoke at times into the weekend with mainly hazy skies.
  However thicker concentrations near surface and unhealthy air
  quality is possible across parts of northern Illinois through
  tonight.

- Next week a pattern change next week will bring periodic storm
  chances, followed by cooler temperatures toward the end of the
  week.

&&

.SHORT TERM /THROUGH TONIGHT/...
Issued at 118 PM CDT Thu Jul 16 2026

Today...For the rest of today, a weak boundary near the Mississippi
River Valley and north of I-80 will be the focus for a few afternoon
showers and thunderstorms. These will be slow moving, and isolated
to scattered in nature, with most locations staying dry. The risk
for severe weather is low due to the lack of deep layer shear.
However, given the light boundary layer winds, a few showers or
thunderstorms could stretch the low level vorticity, leading to
funnel clouds. Localized heavy downpours are possible as well
given the slow-moving storms.

As for temperatures, it will be another warm and humid day as well,
with afternoon highs in the low to mid 90s, dewpoints in the low
70s, leading to heat indices near 100 degrees.

&&

.LONG TERM /FRIDAY THROUGH THURSDAY/...
Issued at 118 PM CDT Thu Jul 16 2026

Looking ahead, this weather pattern will remain in place through the
weekend, meaning summer-like heat, light winds, and afternoon
showers and thunderstorms with a low risk of severe weather. On
Saturday a weak frontal boundary will move down from the north. This
could be the focus for a few showers and storms, but the better
forcing is to the east.

After that, slightly cooler air will follow for Sunday, but the heat
and humidity look to rebuild again Monday and possibly Tuesday ahead
of an approaching cold front that will drop down from the north. A
few showers and thunderstorms are possible along this front, but
these will be focused mainly to the east again. In the wake of this
front, expect cooler and drier air, with highs closer to the mid 80s
for the middle and end of next week.

&&

.AVIATION /00Z TAFS THROUGH 00Z FRIDAY/...
Issued at 617 PM CDT Thu Jul 16 2026

VFR conditions will prevail through much, if not all of the TAF
period. There will be low-end chances for fog tonight, largely
in river valleys and areas that saw rainfall. Although,
confidence is low. Thus, opted to leave out of the TAFs at this
time. Otherwise, light and variable winds tonight will increase
out of the southwest 15z and beyond. We will see isolated to
widely scattered showers and storms again Friday afternoon, but
confidence on timing and coverage is low at this time.

&&

.DVN WATCHES/WARNINGS/ADVISORIES...
IA...None.
IL...Air Quality Alert until midnight CDT Friday night for ILZ001-
     002.
MO...None.

&&

$$

SHORT TERM...McClure
LONG TERM...McClure
AVIATION...Gunkel