Area Forecast Discussion
Issued by NWS Grand Junction, CO

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FXUS65 KGJT 182342

Area Forecast Discussion
National Weather Service GRAND JUNCTION CO
542 PM MDT Sun Jun 18 2017

.SHORT TERM...(Tonight through Monday night)
Issued at 219 PM MDT Sun Jun 18 2017

A few clouds are popping up this afternoon over the San Juans
while much higher, thinner clouds are drifting over the rest of
the CWA. No concerns for any precipitation as high pressure
remains firmly in control and will remain so over the next several
days. High temperatures should run a few degrees below what we saw
yesterday but when we`re talking mid to upper 90s, it doesn`t make
too much of a difference. Having said that, as the center of high
pressure moves more directly over the four corners region,
temperatures look to increase even more tomorrow. Highs on Monday
for southeast Utah and the Moab area look to range from 105F
upwards which is well within heat advisory criteria so said
advisory remains in effect. As far as any weather, a few more
clouds are possible over the San Juans with a very slight chance
for a passing shower. Dry and hot everywhere else.

.LONG TERM...(Tuesday through Sunday)
Issued at 219 PM MDT Sun Jun 18 2017

The center of high pressure remains overhead Tuesday but gets
slowly forced southward as passing waves move across the northern
Rockies. The first wave brushes our CWA Tuesday afternoon and
evening but minimal moisture and forcing will keep any showers and
convection over the higher terrain and even that will be very
isolated. A second wave looks to move over during the day Thursday and
while the trough itself is rather weak, it does dig a bit further
into our area which might cause enough lift to fire off a bit
more convection.

As far as temperatures are concerned, no change there as triple
digit highs continue for southeast Utah/Moab and will filter into
the Grand Valley. For that reason, the heat advisory for southeast
Utah continues with the Grand Valley being added. This advisory
continues until Thursday.

On Friday, a stronger wave will drive down from Montana and bring
some widespread showers and storms to the front range while we
remain dry. However, this wave will cause our winds to become more
northerly allowing cooler temperatures to advect in. In fact,
temperatures may drop a few degrees below normal Saturday before
jumping back up to seasonal norms by Sunday.


.AVIATION...(For the 00Z TAFS through 00Z Monday evening)
Issued at 539 PM MDT Sun Jun 18 2017

High pressure will continue to build over the Four Corners region
the next couple of days, resulting in HOT temperatures and VFR
conditions at the terminals. Under this dome of high pressure
expect relatively light terrain driven winds that will become
gusty in the afternoon hours.


Issued at 219 PM MDT Sun Jun 18 2017

A number of streams and creeks continue to run strong, cold, and
high and will continue to do so through early next week. The
Green River near Jensen remains near bankfull and CBRFC forecasts
indicate that high flows there will continue. Meanwhile, tunnel
closures caused the Roaring Fork in Aspen to just barely reach
action stage a few hours ago though now the river is trending
downward again. Obviously, the Roaring Fork is hovering at
bankfull and looks to stay that way for the next few days.

Where water is running high, river banks may become saturated and
unstable. Lowlands along the rivers may also become inundated with
water.  Remember if you are going to raft, kayak or tube on the
rivers be sure to always wear a life jacket.


CO...Heat Advisory from noon Tuesday to 10 PM MDT Thursday for COZ006.

UT...Heat Advisory from noon Monday to 10 PM MDT Thursday for UTZ022-



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