Area Forecast Discussion
Issued by NWS Denver/Boulder, CO

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FXUS65 KBOU 122107

Area Forecast Discussion
National Weather Service Denver/Boulder CO
207 PM MST Mon Nov 12 2018

.SHORT TERM...(This evening through Tuesday)
Issued at 207 PM MST Mon Nov 12 2018

Mostly clear and cold tonight with subsidence at the surface and
aloft. A strong northerly flow aloft will be over the cwa tonight
into Tuesday, with a west to east oriented ridge axis over
northern Colorado by 21z Tuesday. Mid-level warm air advection
will develop on Tuesday with a weak surface trough in the
afternoon. High temperatures on Tuesday will be warmer but still
8-10 degrees below normal for this time of year.

.LONG TERM...(Tuesday night through Monday)
Issued at 207 PM MST Mon Nov 12 2018

Quiet weather conditions will prevail through Friday. An upper
level ridge will extend from the Pacific west coast east to the
Central Rockies Wednesday. Colorado will be on the backside of the
ridge with a northwest flow aloft Wednesday through Friday.
Expect dry conditions to prevail under this pattern. Temperatures
will be mild and near normal Wednesday through Friday. A weak cold
front associated with a trough moving across the Northern Plains
may bring slightly cooler temperatures Thursday.

The weather changes late Friday when a cold front pushes south
across eastern Colorado and an upper level drops south across the
Rockies. This will increase moisture and usher in colder air. A
northeast upslope flow along the Front Range and lift from the
upper level trough dropping south is expected to bring snow to the
area late Friday and Saturday. Models have come into better
agreement and trended pops upward. This system shears apart by
Sunday. A northerly flow on the backside of a ridge over the
western states eventually replaces the dying trough by Monday.
Expect dry and cool conditions to prevail after Saturday`s system.


.AVIATION...(For the 18Z TAFS through 18Z Tuesday afternoon)
Issued at 207 PM MST Mon Nov 12 2018

VFR with no aviation impacts expected through the period.
Light southeast winds at KDEN and KAPA will transition to a
south/southwest drainage wind overnight.




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