National Weather Service Forecast Discussion for Thornton and Denver, Colorado

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751
FXUS65 KBOU 132205
AFDBOU

Area Forecast Discussion
National Weather Service Denver/Boulder CO
305 PM MST Thu Dec 13 2018

.SHORT TERM...(This evening through Friday)
Issued at 305 PM MST Thu Dec 13 2018

Increasing subsidence will be over the region as high pressure
moves into the Great Basin. Winds will continue to diminish across
the plains with gusts up to 25 mph possible into the early
evening hours. Mostly clear conditions will bring overnight
temperatures into the teens and 20s over the plains and single
digits to below zero over the high country.

For Friday, high pressure will continue to dominate with
increasing westerly flow aloft. Downsloping winds will increase
and bring temperatures into the 50s on the plains and 30s in the
mountains under mostly sunny skies.

.LONG TERM...(Friday night through Thursday)
Issued at 305 PM MST Thu Dec 13 2018

A quickly moving PacNW upper trough will push east over the
Northern Rockies Friday night and into the Northern Plains
Saturday. The only impact from this system to our area will be
increasing winds mixing down and combining with the downsloping
surface pattern. Westerly winds will increase Friday night,
especially over the mountains and foothills, with gust speeds in
the 40 to 50 mph range. Subsidence on the backside of the trough
on Saturday will keep the strong gusty winds going and spread over
the northern plains. Warm advection and the gusty winds Friday
night will allow for warmer temperatures into Saturday.

Winds will decrease but temperatures will remain above normal
under mostly clear skies Sunday and Monday as an upper ridge
builds overhead.

An upper trough will push over the area Monday evening, with most
of the energy going south. At this time, no models have any
precipitation for our area, keeping it south. Another ridge will
move across the state for Tuesday for a continued no weather day.
Models showing the next system will be a quick mover out of
Canada/PacNW to slide into the Northern Plains Wednesday . Only
the Canadian has it far enough south and west to bring any sort of
precip to the area, whereas the GFS and EC hold it further north
and east to have little impact on the area. Forecast will side
with the latter, having continued warmer than normal and mainly
dry conditions. May see a few snow showers in the mountains, but
even this chance seems to be waning.


&&

.AVIATION...(For the 00Z TAFS through 00Z Friday evening)
Issued at 305 PM MST Thu Dec 13 2018

VFR conditions will persist through the period. Winds will be
light from the NE then switch to the south by 01z and drainage
after 5z with speeds under 10kts. Winds will settle into a SSE
flow for most of tomorrow with speeds from 8 to 10 kts.


&&

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

$$

SHORT TERM...Bowen
LONG TERM...Kriederman
AVIATION...Bowen

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