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FXUS65 KGJT 170910

Area Forecast Discussion
National Weather Service Grand Junction CO
310 AM MDT Tue Sep 17 2019

.SHORT TERM...(Today through Wednesday)
Issued at 240 AM MDT Tue Sep 17 2019

Moisture will continue to be drawn north ahead of a 500 mb trough
moving through the Great Basin this morning. Showers present on
satellite and radar over the western San Juan mountains early this
morning will spread north. About Noon the Pacific trough will be
over northwest Colorado and precipitation areas associated
directly with it will phase with the precipitation over CO. These
storms should be fast-moving producing significant wind gusts over
northwest CO. Dry air quickly moves into eastern UT this afternoon
and western CO this evening.

.LONG TERM...(Wednesday night through Monday)
Issued at 240 AM MDT Tue Sep 17 2019

The active pattern with progressive moderately strong troughs
passing through ever few days will continue the rest of this week
and through the weekend. Wednesday and Wednesday night will be 
dry with increasing southwest flow aloft and the next trough 
strengthens over the Pacific Northwest. Thursday will see moisture
being drawn north and into the area and the next trough moves into
the western Great Basin. Precipitation should increase Thursday
night and Friday morning as the trough moves through the area from
west to east. Dry air moves in quickly behind the trough Friday
night and Saturday. The drier weather will continue through
Monday, through southwest winds will increase Monday as the next
Pacific trough moves into the western Great Basin.


.AVIATION...(For the 12Z TAFS through 12Z Wednesday morning)
Issued at 240 AM MDT Tue Sep 17 2019

VFR conditions will prevail this morning. A strong trough will 
move into the Great Basin today and moisture will also increase 
from the south ahead of this trough. Showers and thunderstorms 
will increase across the area after about 18z with CIGS below ILS 
breakpoints possible at all TAF sites. Mountains will also be 
locally obscured in stronger showers. VFR conditions will return
tonight as dry air moves quickly into the area after the trough




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