National Weather Service Forecast Discussion for Thornton and Denver, Colorado

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000
FXUS65 KBOU 192057
AFDBOU

Area Forecast Discussion
National Weather Service Denver/Boulder CO
257 PM MDT Fri Oct 19 2018

.SHORT TERM...(This evening through Saturday)
Issued at 257 PM MDT Fri Oct 19 2018

A surface high pressure system will move southeastward out of
Canada to around Iowa during the afternoon tomorrow. This, along
with a mid to upper level ridge over the northwest U.S., will keep
Colorado dry with mainly clear skies through Saturday. As the high
pressure system moves closer, pressure gradients will become
weaker resulting in lighter winds on Saturday than were observed
on Friday across the eastern plains. Temperatures will cool to
near or slightly above seasonal normals tonight. With the light
wind and sunny skies tomorrow, highs will be about 5 degrees above
normal.

.LONG TERM...(Saturday night through Friday)
Issued at 257 PM MDT Fri Oct 19 2018

A quasi Rex Block pattern is will be transitioning east Saturday
night with the ridge extending from the Pacific Northwest to the
Southern Plains. Underneath this ridge, Sunday temperatures are
still on track to be nearly 10 degrees above normal for portions
of the northern plains.

Monday a low pressure center will transition east toward the
forecast area and bring slight chances of snow showers to the
high mountains. Tuesday through Wednesday isolated to scattered
rain showers will occur over the plains.

Toward the end of next week a ridge will begin to move in with
more subsident air. Orographic snow showers should form over the
high country in northwest flow and the eastern plains will have a
slight chance of rain showers.

&&

.AVIATION...(For the 18Z TAFS through 18Z Saturday afternoon)
Issued at 257 PM MDT Fri Oct 19 2018

VFR conditions will continue through Saturday. Winds are
weakening slightly at DEN and veering toward the northeast and
this trend should continue through the evening. Winds turn
southeasterly late this evening and then to drainage overnight.
Tomorrow, high pressure nearby will allow for light winds that
turn toward upslope flow by the afternoon.

&&

.BOU WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$

SHORT TERM...Danielson
LONG TERM...Sullivan
AVIATION...Danielson

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