Area Forecast Discussion
Issued by NWS Denver/Boulder, CO

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FXUS65 KBOU 201642
AFDBOU

Area Forecast Discussion
National Weather Service Denver/Boulder CO
1042 AM MDT Sat Oct 20 2018

.UPDATE...
Issued at 1040 AM MDT Sat Oct 20 2018

clear skies and fair weather with only minor adjustments to the
grids.

&&

.SHORT TERM...(Today and tonight)
Issued at 346 AM MDT Sat Oct 20 2018

Upper level ridging over the state along with high pressure at the
surface will bring another fine fall day to north-central and
northeast Colorado. With the upper level ridge axis centered over
Colorado today, winds aloft will be very light. Surface winds will
also remain light due to weak pressure gradients across the state.
The airmass is dry and will remain that way, resulting in cloud-
free skies. Temperatures will be a few degrees warmer than normal,
about where they were yesterday. The benign weather conditions
will continue overnight, as the upper air pattern will be slow to
change.

.LONG TERM...(Sunday through Friday)
Issued at 346 AM MDT Sat Oct 20 2018

The flow aloft will become more west to southwest on Sunday ahead of
a weak upper level trough over the western US.  Overall it will be
dry with above normal temps as readings rise into the lower to mid
70s across nern CO.

On Monday the weak upper level trough will move into the Great Basin
with SW flow aloft over the area.  There will be some mid level
moisture embedded in the flow which will allow for a slight chc of
showers, in the mtns, by aftn into the evening hours. Over nern
CO it will remain dry with south to southeast low level flow. With
less of a downslope component and a few degrees of cooling, in
the lower levels, highs will drop into the 60s across the plains.

For Tuesday through Wednesday the weak upper level trough will
slowly move across the area.  Cross-sections have quite a bit of
moisture associated with this feature as deeper level moisture
advects across the plains by Wednesday in southerly low level flow.
Overall there is only weak mid level ascent with the trough,
however, with the abundant moisture will see an increasing chc of
showers over the higher terrain on Tuesday and then across the
plains by Wednesday.  As for highs, with expected increase in cloud
cover along with minor cooling in the lower levels, temps will drop
back to more seasonal levels.

By Thursday the weak upper level trough will move east of the area
with drier air spreading across in NW flow aloft.  Thus precip
chances will gradually end.  On Friday little change will occur as a
dry airmass remains across the area.  Highs both days will be
slightly above normal.

&&

.AVIATION...(For the 06Z TAFS through 06Z Saturday night)
Issued at 346 AM MDT Sat Oct 20 2018

No aviation impacts today or tonight. easterly in the afternoon
and southeast to southeasterly tonight. Wind speeds should remain
lower than 12 knots.


&&

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

$$

UPDATE...Cooper
SHORT TERM...Dankers
LONG TERM...RPK
AVIATION...Dankers


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