Area Forecast Discussion
Issued by NWS Grand Junction, CO

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FXUS65 KGJT 192057

Area Forecast Discussion
National Weather Service GRAND JUNCTION CO
257 PM MDT Mon Mar 19 2018

.SHORT TERM...(Tonight through Tuesday night)
Issued at 228 PM MDT Mon Mar 19 2018

Northwest flow aloft with slowly diminishimg moisture will
continue orographic snow showers over the northwest CO mountains,
mainly along the Continental Divide above Steamboat Springs.
Though the rest of western CO and eastern UT dries considerably
through Tuesday, the mountains in Routt County should continue to
see these orographic showers through Tuesday night. The rest of
the area will see clearing skies and a warming trend.

.LONG TERM...(Wednesday through Monday)
Issued at 228 PM MDT Mon Mar 19 2018

The long term starts out with a ridge over the Great Basin that
will gradually slide east and over the forecast area by Thursday.
Moisture should ride up and over the ridge that will keep the
northern third of the forecast area under variable middle and high
cloudiness. Late Wednesday night and Thursday the upper ridgeline
will move east of the area, opening up eastern UT and western Co
to increasing clouds and precipitation from the west.

Thursday will see a large low pressure system over the Gulf of
Alaska with a strong shortwave trough riding along the eastern
periphery of the low. This drives a weak cold front through the
area Thursday night and Friday. The main energy from the larger
low will ride north of the area through the weekend with a
moderate jet stream over eastern UT and western CO. All of eastern
UT and western CO will be impacted Thursday night and Friday,
followed by west winds and orographic showers over central and
northwest CO Saturday.


.AVIATION...(For the 18Z TAFS through 18Z Tuesday afternoon)
Issued at 228 PM MDT Mon Mar 19 2018

Isolated snow showers will affect KRIL, KEGE, and KASE through
about 06z tonight, bringing CIGS occasionally below ILS
breakpoints through 12Z. The northern and central mountains of CO
will be occasionally obscured as well.




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