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Area forecast discussion 
National Weather Service Grand Junction Colorado
1040 am MDT Sat Jul 30 2016

Short term...(today through sunday)
issued at 252 am MDT Sat Jul 30 2016

High pressure centered over the SW U.S. Will continue bringing
hot and relatively dry conditions to the forecast area. A weak
shortwave trough will pass through eastern Utah tonight and western
Colorado Sunday. This slow moving trough will help push the high
pressure to the south and east today and Sunday. This movement
will gradually position the ridge to help draw moisture north and
into the area. Thus there will be a slight increase in moisture
content this evening and overnight. This start of another monsoon
episode will improve a bit more on Sunday as the area heads toward
another moderate monsoonal surge through the week.

Long term...(sunday through friday)
issued at 330 PM MDT Fri Jul 29 2016

A better surge of moisture will move over the area on Sunday as
the high pressure over the southwest Continental U.S. Begins to be pushed to
the east. Therefore the chance for showers and thunderstorms...and
of wetting rain...will increase. Storms will still favor the late
day period...and the mountains. Moisture will then linger through
the week...with some daily fluctuations. But convective activity
will be expected each day...especially during the afternoons and
evenings. However some nocturnal storms will be possible at times
as weak and hard to resolve disturbances are carried by the flow.

Due to the increased clouds/chance of showers...daytime
temperatures will run a little cooler. Nighttime lows will be on
the warmer side for the same reason.


Aviation...(for the 18z tafs through 18z Sunday afternoon)
issued at 1040 am MDT Sat Jul 30 2016

Moisture is beginning to spread out of the desert SW in the form
of a middle cloud deck and areas of sprinkles and virga this
morning. Heating of the day will use this moisture to produce
mainly terrain based storms this afternoon. The main threat to
aviation from these buildups will be gusty outflow winds at area
terminals. Outside of gusty winds...probabilities are still low
that precipitation will impact flight conditions at local forecast
terminals over the next 24 hours.


Gjt watches/warnings/advisories...


Short term...cirrocumulus

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