Duncan, Iowa Weather Forecast Discussion

328
FXUS63 KDMX 272321
AFDDMX
Area Forecast Discussion
National Weather Service Des Moines IA
621 PM CDT Sat Sep 27 2025
...Updated for the 00z Aviation Discussion...
.KEY MESSAGES...
- Warm and dry through most of next week.
&&
.DISCUSSION...
Issued at 202 PM CDT Sat Sep 27 2025
Surface cold front crossing the area today will bring slightly
cooler low temperatures tonight, with a quick return to above
normal on Sunday as the surface ridge quickly exits the area.
Broad ridging aloft will dominate the weather over the upper
midwest for much of the coming week. Scarce moisture combined
with southerly low level flow will result in unseasonably warm
temperatures (highs ~10-15 degrees above normal) through the
period.
Long range models try to dampen the ridge toward next weekend as
a surge of energy drops into the western US. Confidence in the
timing of this evolution is low, however, due mainly to the
presence of tropical systems in the Atlantic.
&&
.AVIATION /00Z TAFS THROUGH 00Z SUNDAY/...
Issued at 620 PM CDT Sat Sep 27 2025
The dry cool front continues to slowly track southeastward
across Iowa, with current placement just beyond the KDSM
terminal. The winds as a result have largely shifted
north/northwesterly, and will occur at KOTM within the next few
hours. Mid to upper level clouds with this front may linger
mainly across the southeast into Sunday, with VFR conditions
expected. Winds shift further out of the southeast through
Sunday, remaining relatively light.
&&
.DMX WATCHES/WARNINGS/ADVISORIES...
None.
&&
$$
DISCUSSION...DMD
AVIATION...Bury

NWS DMX Office Area Forecast Discussion