Capitol Heights, Iowa Weather Forecast Discussion

058
FXUS63 KDMX 301119
AFDDMX
Area Forecast Discussion
National Weather Service Des Moines IA
619 AM CDT Tue Sep 30 2025
...Updated for the 12z Aviation Discussion...
.KEY MESSAGES...
- Warm and dry through the end of the week.
&&
.DISCUSSION...
Issued at 128 PM CDT Mon Sep 29 2025
Cumulus clouds have developed across parts of Iowa this afternoon
associated with a shallow plume of mid level moisture into the area.
The large blocking pattern across the central US will continue to
dominate sensible weather over Iowa throughout this week. Late
tonight and into Tuesday the western US trough will sink
towards the area, increasing convergence over western and
northern Iowa with a narrow moisture plume. While a few CAMs
squeeze out weak echos in simulated reflectivity, soundings are
fairly dry. A few sprinkles may occur with increasing cloud
cover, but any notable precipitation is unlikely. That cloud
cover may put a damper on temperatures by a few degrees, but it
will still be quite warm. Steady southerly flow through the
week will help keep temperatures in the mid to upper 80s, 10-15+
degrees above seasonal averages which are in the low 70s this
time of year. Precipitation chances return this weekend as the
western trough finally shifts east, however uncertainty remains
in terms of timing and placement at this time range and will
depend in some part on how the Atlantic systems evolve.
&&
.AVIATION /12Z TAFS THROUGH 12Z WEDNESDAY/...
Issued at 617 AM CDT Tue Sep 30 2025
VFR once again today with some mid-level and high level clouds
passing through around 6-8 kft and 20-25 kft. The wind will
diurnally increase again and there remains a low chance that
there is a brief period of sustained near 12 kts or gusts to
near 18 kts. Have kept the wind from the southeast at 8-10 kts
much of the period.
&&
.DMX WATCHES/WARNINGS/ADVISORIES...
None.
&&
$$
DISCUSSION...Hagenhoff
AVIATION...Donavon

NWS DMX Office Area Forecast Discussion