FXUS63 KDMX 250759

Area Forecast Discussion
National Weather Service Des Moines IA
259 AM CDT Sun Sep 25 2022

.DISCUSSION.../Today through Saturday/
Issued at 259 AM CDT Sun Sep 25 2022

Key Messages:

-Gusty winds this afternoon.
-Relatively quiet and cool conditions into the upcoming week.

A cooler and drier airmass is arriving in the state this morning on
northwest winds.  Skies have cleared over much of Iowa with readings
dropping into the 50s.  After sunrise, mixing is expected to
increase through the early afternoon with winds gradually increasing
as the mixing begins to maximize.  Gusts of up to 35kts are possible
in the north for a few hours this afternoon although most should
remain low than this.  Limited fire weather conditions exist in the
north and west with relative humidity values dropping to around 25
percent by afternoon, however overall greenness remains sufficient
to keep the threat below red flag criteria. The winds should
decouple rather quickly into the evening as mixing subsides with
cool readings overnight as readings drop into the 40s.

Iowa remains on the backside of a rather large eastern trof for the
first half of the week helping keep temperatures below normal during
this time.  The coolest air arrives behind a cold front which slides
through the state on Tuesday.  Clear skies on Tuesday night should
allow for good radiational cooling as winds begin to decrease with
weakening pressure gradient. Current guidance has morning low
approaching freezing in the far northeast by Wednesday morning with
a broader area of the north and east which may see some frost
assuming winds are light enough and skies remain clear and headlines
may be needed. Otherwise, warm advection increases into the end of
the work week with temperatures returning closer to normal by
Friday. The overall threat of precipitation remains quite low during
the week with moisture limited across much of the Midwest.


.AVIATION.../For the 06Z TAFS through 06Z Sunday night/
Issued at 1124 PM CDT Sat Sep 24 2022

VFR conditions expected to prevail through the period with gusty
northwest winds expected tomorrow. KMCW and KALO can expect to see
gusts exceed 30kts at times.






NWS DMX Office Area Forecast Discussion