Walton Lake Iowa Weather Forecast Discussion

852
FXUS63 KDVN 131921
AFDDVN
Area Forecast Discussion
National Weather Service Quad Cities IA IL
221 PM CDT Mon Oct 13 2025
.KEY MESSAGES...
- Occasional chances for showers through Wednesday night,
  especially for areas along and north of I-80.
- Well above normal temperatures are expected once again late
  in the week with highs on Friday in the upper 70s to lower
  80s.
- A cold front will bring a chance for showers and storms Friday
  night into Saturday, along with breezy conditions and cooler
  temperatures for the weekend.
&&
.SHORT TERM /THROUGH TUESDAY NIGHT/...
Issued at 200 PM CDT Mon Oct 13 2025
Tonight through Tuesday: Surface high pressure will continue to
build into the Upper Mississippi Valley and Great Lakes
regions, as a 500mb ridge expands over the area. A low-level
boundary (surface-850mb) will remain nearly stationary across
eastern Iowa into northwest Illinois through tonight, roughly
along the Highway 30 corridor, separating much drier air to the
north and moist conditions along and south. The HREF has low
cloud cover expanding overnight, initially along/south of
Highway 30, then gradually spreading northward through the day
on Tuesday. Weak low-level warm air advection through the day on
Tuesday may lead to the development of isolated to scattered
showers (15-30%). The highest chances will hold off until
Tuesday night as a mid-level impulse exits the Central Plains
and tracks across the region (30-60% north of I-80 and near 20%
down toward the Highway 34 corridor). Cooler, more seasonable
temperatures are expected on Tuesday with highs ranging from the
lower 60s in the northwest to the mid 70s far east-central to
southeast.
&&
.LONG TERM /WEDNESDAY THROUGH SUNDAY/...
Issued at 200 PM CDT Mon Oct 13 2025
On Wednesday, the front is expected to remain just south of the
CWA, with plenty of mid clouds and some threat for light
precipitation in over-running in the north 1/2 of the CWA. Highs
in the 60s north and mid 70s south are expected. Following this
cooler period, a deep western trof will advance east aloft,
with drawing the front northward again, for Thursday and Friday.
The NBM is very aggressive on strong warming in this period,
with mid 70s to lower 80s forecast. On Friday, the warm
temperatures combined with breezy south winds may lead to an
elevated fire weather potential in unharvested fields.
Friday night into the weekend, the deep upper trof continues to
show movement far enough east to push a cold front through our
CWA, and with that, we have pops for rain in the 40-70% range.
It`s still pretty far out, so there remains low confidence on
this potential storm system`s impacts.
&&
.AVIATION /18Z TAFS THROUGH 18Z TUESDAY/...
Issued at 1200 PM CDT Mon Oct 13 2025
VFR expected today with plenty of sun as the main band of clouds
shifts to the east through Illinois. A boundary will remain
over the area into Tuesday, likely leading to the redevelopment
of low clouds (3000-5000 ft AGL) late tonight mainly south of
DBQ. This could result in periods of MVFR ceilings, most favored
at CID and BRL for Tuesday AM. Isolated showers are possible
late in this TAF period but did not include in the TAFs with
this update due to low confidence on coverage.
&&
.DVN WATCHES/WARNINGS/ADVISORIES...
IA...None.
IL...None.
MO...None.
&&
$$
SHORT TERM...Uttech
LONG TERM...Ervin/Uttech
AVIATION...Uttech

NWS DVN Office Area Forecast Discussion