Area Forecast Discussion
Issued by NWS Grand Junction, CO

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FXUS65 KGJT 050547

Area Forecast Discussion
National Weather Service GRAND JUNCTION CO
1047 PM MST Mon Dec 4 2017

.SHORT TERM...(Tonight through Tuesday night)
Issued at 252 PM MST Mon Dec 4 2017

Snow showers hanging in across NW Colorado with cold...moist and
unstable flow in place. Webcams show roadways much improved since
this morning but there will likely still be some impact from ice
overnight. Fully the bulk of clouds and showers to quickly
dissipate near sunset with only some showers lingering across the
northern divide mountains through late evening. Extremely dry air
in place and under clears skies and light winds...temperatures
should plummet through the night. There could be some patchy fog
developing in the Gunnison Basin with the cold air interacting
with the reservoir. The cold start to the day sets up an early
challenge to the forecast with neutral lapse rates or weak valley
inversions in place. Went near the colder guidance for tomorrow
as a result...however skies should be mostly sunny and snow free
areas could do better than anticipated. Another cold night
expected Tuesday.

.LONG TERM...(Wednesday through Monday)
Issued at 252 PM MST Mon Dec 4 2017

A stubborn ridge along the Left Coast of NOAM will be a feature
throughout the long term forecast and basically spells doom for
Pacific moisture reaching inland. There will be a few passing
system dropping southward on the back side of the ridge mid-week
that will bring some cloudiness and very light snow to the
northern and central high country of Colorado. Impacts appear
minimal at this time. The impact of the cloudiness to temperature
forecast may be the biggest challenge at this time. Warmer and
drier air move for late forecast period and we should see a
general warming trend.


.AVIATION...(For the 06Z TAFS through 06Z Tuesday night)
Issued at 1030 PM MST Mon Dec 4 2017

VFR conditions expected at all TAF sites through Tuesday night.
Some lower CIGS will continue at mountain TAF sites and light
snow will continue over the Continental Divide through 09z. Dry
northwesterly flow will develop on Tuesday which will allow for
skies to clear and winds to generally remain light and variable.




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