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Area forecast discussion
National Weather Service Denver/Boulder Colorado
337 PM MDT sun Oct 20 2019

Short term...(this evening through monday)
issued at 337 PM MDT sun Oct 20 2019

Strong northwest flow aloft will persist through Monday. Expect
strong winds to linger through the afternoon and decrease after
sunset across the northeast plains. Gusts of 65 to 75 mph have
been observed in the foothills, while a few gusts to around 60
have occurred over the northeast plains. Will keep the High Wind
Warning in effect until 7pm MDT.

Moisture embedded in the northwest flow combined with orographic
lift will continue to produce light snow over the mountains
through Monday. In addition to the orographic lift, the left exit
region of the jet over north central Colorado will provide
additional lift. Due to the strong winds aloft some blowing snow
will also be possible, especially over the mountain passes. Will
issue a Winter Weather Advisory for the mountains through Monday
afternoon and into Monday evening. An additional 3 to 8 inches of
snow is expected along with gusty winds. Roads should be snow
covered over the mountain passes.

The northwest flow will keep cool air over the area. Highs should
reach the lower 50s across northeast Colorado. Northwest winds
will pick up by afternoon with gusts to 40 mph over the northeast

Long term...(monday night through sunday)
issued at 337 PM MDT sun Oct 20 2019

The first part of the week is going to feature some more light
snow in the mountains as moist northwesterly flow aloft continues
over the state. Snow amounts should be on the light side, so
the snow pack will build slightly, but impacts on the roads should
be minor. On the plains, temperatures will warm up through
Tuesday, to around seasonal normals. Breezy conditions may also develop
at times.

The latter half of the week will see an upper trough move over the
state from out of the northern Rocky Mountains. This will bring
much cooler temperatures to the region from Wednesday night
through Friday morning. Quasi-geostrophic diagnostics shows that
the upper trough will produce strong forcing which will result in
a significant amount of snowfall over the mountains and then out
onto the plains. The trough is forecast to quickly move out of the
state and over the Southern Plains. This will lead to rapidly
improving weather by Friday and Saturday as an strong upper ridge
builds over California and Nevada. Saturday will be the warmest
day of the week, but another cold front is expected with cooler
temperatures on Sunday.


Aviation...(for the 18z tafs through 18z Monday afternoon)
issued at 337 PM MDT sun Oct 20 2019

Strong west to northwest winds will continue to gusts to 45 knots
through 00z and then slowly decrease. Winds will continue to
slowly decrease this evening and eventually back to a drainage
wind after 06z. Northwest winds will increase Monday with gusts to
35 knots after 18z. VFR conditions will persist through Monday
with scattered mid and high clouds.


Bou watches/warnings/advisories...
High Wind Warning until 7 PM MDT this evening for coz035-036-038-

Winter Weather Advisory from midnight tonight to 9 PM MDT Monday
for coz031-033-034.

Red flag warning until 8 PM MDT this evening for coz241-246-247.


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