Area Forecast Discussion
Issued by NWS Grand Junction, CO

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FXUS65 KGJT 282134

Area Forecast Discussion
National Weather Service GRAND JUNCTION CO
334 PM MDT Fri Apr 28 2017

.SHORT TERM...(Tonight through Saturday night)
Issued at 253 PM MDT Fri Apr 28 2017

Increasing clouds late tonight will prevent subfreezing
temperatures in the Grand Junction vicinity tonight, but mostly
clear skies will bring widespread freezing temperatures to the
central Gunnison, Uncompahgre and North Fork of the Gunnison river
valleys tonight.

A large trough centered over western CO will continue traveling
south as a strong shortwave trough develops on its western side.
This shortwave will travel quickly to New Mexico as it strengthens
causing the main low to travel into New Mexico late tonight. This
low will then move east and northeast to southeast CO late
tonight. As this low moves east, clouds will be draw from east to
west across the forecast area late tonight. These clouds will
spread over northwest and central CO preventing widespread sub-
freezing temperatures in the Grand Junction Vicinity.

Skies will clear again Saturday night which may lead to more
freezing temperatures over west-central Colorado.

.LONG TERM...(Sunday through Friday)
Issued at 253 PM MDT Fri Apr 28 2017

Sunday morning may be another cold one as skies are projected to
become mostly clear, allowing temperature to drop. A ridge will
build over the western U.S. Sunday with eastern Utah and western
CO on its eastern periphery. This will bring north winds over the
area keeping temperatures below seasonal norms through
Wednesday. Two weak shortwave troughs may clip the northern CO
zones Monday and Tuesday, but the rest of the area will be dry
through the week. By Thursday temperatures should warm to near
normal, then rise well above normal Friday.


.AVIATION...(For the 00Z TAFS through 00Z Saturday afternoon)
Issued at 253 PM MDT Fri Apr 28 2017

Slow moving and cold upper low will drift toward the 4 Corners
then southeast over the next 24 hours. This will keep instability
showers over the region until around sunset...favoring the
mountains, especially the central and southern Continental Divide.
Moderate to heavy showers are possible which will quickly drop
VFR conditions down to IFR. The highest probability for this to
occur will be over the mountain terminals including KRIL...KEGE...
KASE and KTEX. ILS conditions may also be prolonged as well in
many areas. Gusty north winds also look to set up overnight from
NW. Extreme western CO into Eastern UT on the back side of the
storm with gusts over 25 mph possibly influence landing and
takeoff decisions. Conditions will improve Saturday morning
through the afternoon.


CO...Freeze Warning from midnight tonight to 9 AM MDT Saturday for



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