547
FXUS63 KDVN 051736
AFDDVN

Area Forecast Discussion
National Weather Service Quad Cities IA IL
1236 PM CDT Wed Jun 5 2024

.KEY MESSAGES...

- Late this afternoon and evening there will be a period of
  several hours where winds may gust up to 40 mph along and
  behind the front, especially with showers.

- A pattern change will keep temperatures at or slightly below
  normal Thursday through Tuesday with precipitation below
  normal.


- Near daily weak upper level disturbances aloft pose a low risk
  (10-20%) of diurnal showers from Saturday through Tuesday.

&&

.SHORT TERM /THROUGH THURSDAY/...
Issued at 258 AM CDT Wed Jun 5 2024

The true cold front is just entering eastern Iowa and should clear
the far eastern areas by mid-morning and bring an end to the rain
across the area.

After a quiet late morning through mid-afternoon, a secondary cold
front will drop south out of Minnesota. Data indicates the front
will move through the area during the late afternoon and evening
hours producing rain showers with areal coverage of 20-40%.

The models show strong winds of 50 mph about 1 kilometer above the
surface associated with the secondary cold front. The front will be
arriving after peak heating but it does appear there will a period
of several hours late this afternoon and evening where winds may
gust up to 40 mph as rain showers would pull the higher momentum air
to the surface.

By late evening winds will slowly diminish as skies clear and
humidity levels drop.

&&

.LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/...
Issued at 258 AM CDT Wed Jun 5 2024

Thursday through Friday night
Assessment...high confidence on temperatures at or slightly below
normal.

High pressure moving through the Midwest will keep pleasant but dry
conditions across the area. Deep mixing of the atmosphere will
result in breezy conditions developing each day from late morning
through the afternoon.

Saturday through Tuesday
Assessment...high confidence on temperatures at or slightly below
normal. Low to medium confidence on rain chances.

Temperatures will continue to be at or slightly below normal over
the weekend and into early next week.

In the northwest flow aloft there are daily weak upper level
disturbances moving through. While there are small differences in
timing, most solutions indicate the disturbances arriving during the
afternoon hours. Moisture availability will be key but often the
disturbances are a bit stronger than what the models indicate.

Thus the potential is there for diurnal convection to occur each
afternoon that dissipates in the evening. Coverage will be quite
low at 10-20%. Thus while there is a low risk of rain each day, the
key message is that a vast majority of the area will remain dry.

&&

.AVIATION /18Z TAFS THROUGH 18Z THURSDAY/...
Issued at 1230 PM CDT Wed Jun 5 2024

VFR conditions to start the period as eastern Iowa TAF sites
sit between two storms systems. A fast moving storm system will
bring rain showers and potentially isolated thunderstorms to
the area between 00 and 04 UTC with MVFR visibilities at KCID,
KDBQ, and KDVN. After this, VFR conditions will prevail. Gusty
northwesterly winds will develop after 12 UTC with gusts up to
25 knots possible late in the period.

&&

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

&&

$$

SHORT TERM...08
LONG TERM...08
AVIATION...Cousins