Area Forecast Discussion
Issued by NWS Des Moines, IA

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FXUS63 KDMX 221043

Area Forecast Discussion
National Weather Service Des Moines IA
543 AM CDT Mon Jul 22 2019

.DISCUSSION.../Today through Sunday/
Issued at 349 AM CDT Mon Jul 22 2019

Overall little to discuss with quiet weather expected through
much of the week with a large high amplitude upper ridge in place
across the western/central US and large surface high pressure
building into the state today and continuing to remain in place
across the region through mid week. Will see temps cooler today
with colder air in place aloft with moderating temperatures
through the week. A weak upper level wave will drop through the
eastern US long wave trough and bring a weak boundary through the
state which may increase cloud cover some into Tuesday night
Wednesday. Otherwise seasonable to cooler than average
temperatures expected across the state with northwest to northerly
upper level flow pattern in place and H85 temps hovering around

The upper ridge begins to flatten and break down into Thursday and
friday as an upper level wave moves through the Canadian Rockies.
This will bring a surface boundary through and open the Gulf with
moisture advection increasing across the state. Still much of the
precipitation chances with this system are expected to remain
further north closer to the upper level wave, some thunderstorms
will be possible as the upper wave moves through the region Friday
into Saturday. Another shortwave trough will move through the more
westerly, zonal flow pattern ejecting from the Rockies Saturday
and moving through Iowa into Sunday which will bring continued
chances for additional thunderstorms Sunday into early next week.
H85 temps increase to around +20C or higher ahead of that next
wave for late this weekend which should bring a return to above
normal temperatures by Saturday into early next week.


.AVIATION.../For the 12Z TAFS through 12Z Tuesday morning/
Issued at 543 AM CDT Mon Jul 22 2019

VFR conditions expected through the TAF forecast period. Some low
mid level CU expected this afternoon with skies clearing tonight.
Mainly northerly winds picking up a bit this afternoon then
diminishing and becoming more northwesterly this evening.





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