972
FXUS63 KDVN 090813
AFDDVN

Area Forecast Discussion
National Weather Service Quad Cities IA IL
313 AM CDT Wed Sep 9 2026

.KEY MESSAGES...

- A storm system with widespread showers and isolated
  thunderstorms will slowly move through the area this morning.
  Heavy rainfall with the potential for some localized flash
  flooding will be possible in eastern Iowa south of Interstate
  80.

- Quiet cooler weather Thursday into Friday, as high pressure passes
  overhead.

- Another stretch of potentially active weather this weekend
  into the next work week, bringing daily chances of
  precipitation for some.

&&

.SHORT TERM /THROUGH TONIGHT/...
Issued at 313 AM CDT Wed Sep 9 2026

Warm advection ahead of a cold front continues to support widespread
showers and isolated storms across the area early this morning. An
estimated 0.5-3.0 inches of rainfall has already fallen along and
north of Highway 34, with the highest amounts in eastern Iowa near
the Interstate 380/Highway 218 corridor. Additional rainfall of 0.5-
1.5 inches is expected along and south of Highway 30 through mid-
morning as PWATs maximize near 2.00+ inches along the boundary. This
is especially true along the Interstate 80 corridor where a training
line of thunderstorms extends from central Iowa to eastern Nebraska.
While weaker instability in eastern Iowa will lead to these
thunderstorms weakening as they enter the area, heavy rain with
rainfall rates will remain possible, leading to localized areas of
heavy rain, which may result in isolated flash flooding.

As the axis of showers and storms drifts southward, support will
decrease with the decay of the nocturnal LLJ this morning. This will
result in decreasing coverage past mid-morning. By early afternoon,
showers will have fully exited the area. However, cloud cover will
clear more slowly, which in addition to the morning showers will
help limit highs to the upper 70s to low 80s.

Following frontal passage this afternoon, dry and pleasant weather
will be expected through the remainder of the day. Lows tonight will
drop into the upper 50s to mid 60s.


&&

.LONG TERM /THURSDAY THROUGH TUESDAY/...
Issued at 245 PM CDT Tue Sep 8 2026

Thursday and Friday...A couple of decent looking days look in store
with bouts of both sfc and upper ridging allowing for dry and near
seasonable conditions.

Saturday through Monday...The latest  suite of medium range models
continue to suggest flattening flow again embedded with passing
short wave and associated sfc fronts making for a potentially active
period.  First in line may be Saturday with a sfc front getting
swept through the area off a passing LLVL cyclone along the
US/Canadian border. Then maybe a short lull for Sunday before signs
of a digging longer wave trof acrs the western high plains arching
steering flow in a southwesterly fashion toward the upper midwest.
This could make for another unsettles period for Sunday night into
early next week if this pattern verifies.

&&

.AVIATION /06Z TAFS THROUGH 06Z THURSDAY/...
Issued at 109 AM CDT Wed Sep 9 2026

Widespread MVFR or lower conditions are expected through the TAF
period. Currently, a widespread area of showers with embedded storm
clusters is making its way through the area. These showers should
support MVFR VSBYs to DBQ/CID through 09/09Z before slowly drifting
southward, followed by a period of MVFR CIGs as the showers begin to
clear. Farther south, storms are still possible (30-60%) at MLI/BRL,
with storms ongoing at MLI and expected to descend southward towards
BRL by 09/07Z. Any storms at MLI/BRL have the potential for MVFR to
LIFR VSBYs, though LIFR/IFR conditions will last for only a short
period in the heaviest areas of rain. These showers will clear MLI
by 09/16Z and BRL by 09/18Z.

Winds through the beginning of the period will be variable to
southerly with the potential for gusts to 30 kts in any storms. Past
09/18Z, winds will shift to northerly as a cold front slowly clears
the area from northwest to southeast, reaching BRL near the end of
the TAF period.

&&

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

&&

$$

SHORT TERM...Ellingworth
LONG TERM...12
AVIATION...Ellingworth