Area Forecast Discussion
Issued by NWS Des Moines, IA

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FXUS63 KDMX 220431

National Weather Service Des Moines IA
1131 PM CDT Fri Oct 21 2016

.SHORT TERM.../This evening through Saturday/
Issued at 329 PM CDT Fri Oct 21 2016

Surface high pressure will continue to slide eastward tonight into
Saturday morning. There is some weak return flow that has
developed over western Iowa and looks to continue throughout the
night tonight. This should be enough to keep temperatures above
freezing this evening. Plus, a very thin and broken cirrus deck
may continue to advect into portions of the central Iowa from

.LONG TERM.../Saturday night through Friday/
Issued at 329 PM CDT Fri Oct 21 2016

Saturday through Monday...Upper level ridge begins to flatten out
and becomes more zonal by Sunday. Regardless, dry weather
anticipated through Monday with the only concern being focused on
a weak trough moving across the state Sunday. This trough will
bring some gusty winds as winds atop the mixed layer range from
25-30 knots with dew point depressions of 15-20F or greater during
theafternoon hours. Nudged up maximum temperatures slightly with
the dry air mass, good mixing, and plenty of sunshine.

Tuesday through Thursday...The GFS/ECMWF have slowed the next
system down and shifted the precipitation slightly further north.
Went dry Tuesday morning and lesser pops during the afternoon
hours. The best forcing and available moisture is still on track
for Tuesday night into Wednesday. Isentropic upglide develops
along the 290-305K surfaces during the day Tuesday and continues
to increase throughout the afternoon hours and then maximizes by
Tuesday evening. Plenty of moisture transport and deep forcing
from 00-12z Wednesday and confidence is high for widespread
rainfall during this time frame.


.AVIATION.../For the 06Z TAFS through 06Z Saturday night/
Issued at 1130 PM CDT Fri Oct 21 2016

Light winds and VFR conditions will prevail through Saturday
evening. Wind will be from the south overnight then become more
southwesterly during the day Saturday.




SHORT TERM...Podrazik
LONG TERM...Podrazik
AVIATION...Donavon is the U.S. government's official web portal to all federal, state and local government web resources and services.