Area Forecast Discussion
Issued by NWS Des Moines, IA

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FXUS63 KDMX 260535

Area Forecast Discussion
National Weather Service Des Moines IA
1135 PM CST Sat Jan 25 2020

.DISCUSSION.../Tonight through Saturday/
Issued at 311 PM CST Sat Jan 25 2020

The main forecast concern was focused on fog, stratus, and
temperatures tonight into Sunday. Then secondary focus on light
precip chances mid-week. Otherwise, generally quiet weather
pattern through much of the next week.

Tonight into Monday...leaned toward a blend of the RAP/HRRR for
cloud cover and visibility.  However, the majority of the hires
models suggest fog to develop past 06z Sunday and persist for a
good chunk of the day Sunday. Extended the mention of fog
through the late morning hours for much of the CWA and even into
the Sunday afternoon/evening for northern Iowa. There is a weak
clipper system to cut across Iowa during the day MOnday but looks
to be moisture starved and left forecast dry for now. This mainly
reinforces the stratus deck across the state.

Tuesday through Saturday...Speaking of cloud cover, the stratus
deck remains across the region as Iowa stays in generally
northwest flow aloft with a couple reinforced shots of moisture
from very weak clipper system. Tuesday could see some freezing
drizzle/light snow potential with one of these aforementioned weak
shortwaves. Depth of the moisture teeters in and out of the snow
growth region and surface temperatures remain in the upper 20s.
The only other system of note to bring any significant
precipitation looks to be mainly Friday, but even that remains low
wrt to QPF.


.AVIATION.../For the 06Z TAFS through 06Z Sunday night/
Issued at 1135 PM CST Sat Jan 25 2020

Widespread IFR to LIFR cigs will overspread the region tonight
along with lowering vsbys in fog. Locally dense fog will be
possible. Vsbys will gradually improve Sunday morning however the
low cigs are expected to persist much of the period. Westerly
winds are expected during the period.




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