Area Forecast Discussion
Issued by NWS Denver/Boulder, CO

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702
FXUS65 KBOU 181524
AFDBOU

Area Forecast Discussion
National Weather Service Denver/Boulder CO
824 AM MST Sat Nov 18 2017

.SHORT TERM...(Today and tonight)
Issued at 308 AM MST Sat Nov 18 2017

The upper trough axis is just about out of the forecast area at
this time this morning, with northwesterly flow aloft as an upper
ridge builds in from the west. Strong subsidence on the backside
of the trough pushed strong winds across most of the plains over
the last couple hours with gusts of 35 to 50 mph. These winds will
continue to slowly subside through the rest of the morning. In
the mountains, yesterdays winter storm has almost come to an end,
except some light orographic snow showers that will likely only
add up to an inch additional accumulation through sunrise. Gusty
winds over the mountains will still produce areas of blowing snow
through today before winds will decrease further this evening.

High temperatures today will be right near normal for this time of
year, in the mid to upper 40s for the plains, in the 20s and 30s
for the mountains. Clouds early this morning will continue to
diminish for mostly clear skies. Northwesterly winds will
continue around 15 to 30 mph over the high country and far
northeastern plains, much lighter elsewhere. Temperatures tonight
will be similar if not a little colder than last nights readings.

.LONG TERM...(Sunday through Friday)
Issued at 308 AM MST Sat Nov 18 2017

There will be a continued dry, northwest flow pattern over
Colorado for Sunday and much of Monday. A warming trend through
this period with readings rising back into the lower 60s on
Monday across the plains. Expect an increase in winds on Sunday
night through Monday morning as a weak ripple in the flow and
resultant enhanced winds over mountains and east slopes. Cross
sections indicate potential wind gusts in the 50-60 mph range
through midday Monday but wind speeds to remain below high wind
criteria.

A weak disturbance will bring a brief shot of light snow into the
mountains Monday night through early Tuesday. Moisture depth is
shallow so only minimal accumulations expected. With lingering
moisture in the northwest flow could see a slight chance of
continued mountain snow continuing through Wednesday. Lower
elevations will remain dry but with cooler, yet more seasonable
temperatures on Tuesday behind the weak trof. Thanksgiving day
looks dry statewide with temperatures well into the 60s across
lower elevations.

The next potential weather maker will move through the region late
Friday and Saturday with a slight chance of snow in the mountains
and cooler temperatures.

&&

.AVIATION...(For the 18Z TAFS through 18Z Sunday afternoon)
Issued at 815 AM MST Sat Nov 18 2017

Wind direction is the forecast challenge today with impacts on
runway configuration at KDEN. A little bit of lee troughing is
battling with high pressure/Cheyenne Ridge anticyclone settling in
from the north. Southwest wind at KDEN has switched around to
northeast with 15z KDEN ob while KAPA remains south. Forecast
continues northeast wind through the day then switches back
southwest this evening as drainage wind sets back up. Wind speeds
less than 10 knots. Othwerwise VFR ceilings/visibility.

&&

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

$$

SHORT TERM...Kriederman
LONG TERM...Entrekin
AVIATION...Hanson



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