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Area forecast discussion 
National Weather Service Salt Lake City Utah
251 am MDT Tuesday Sep 2 2014

Synopsis...a mild westerly flow will prevail through midweek. A
cold front will push into northern Utah late Wednesday through
Thursday...followed by a mild southwesterly flow for the upcoming
weekend.

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Discussion...zonal flow aloft around the northern periphery of a
middle level ridge centered across the Desert Southwest will maintain
a dry airmass across the region today. Backing low level flow
will also allow for a considerable warming trend across northern
and central Utah...as the cool stable airmass which has been in
place the last couple of days erodes.

A shortwave trough is forecast to move into the Pacific northwest
late today through tonight...then continue eastward through the
northern rockies Wednesday. A shallow cold front associated with
this wave is forecast to push into northern Utah late in the day
Wednesday...resulting in another cooldown for the latter portion
of the week across the north. Meanwhile southwesterly flow aloft
will allow for an increase in middle and high level moisture during
this timeframe...which may allow for a few showers and
thunderstorms over the higher terrain.

A middle level trough expected to develop along the Pacific coast
late in the week will maintain a mean southwesterly flow aloft
across the interior west into the upcoming weekend. At this point
it appears any appreciable moisture surge will remain confined to
AZ/nm...with only a slight increase in moisture across the
south...and have left going slight chance probability of precipitation accordingly.

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Aviation...winds at the slc terminal should remain out of the
southeast before switching to the northwest between 17-19z. VFR
conditions will prevail through the taf period under mostly clear
skies.

&&

Fire weather...high pressure aloft will remain to the southeast as
the next system continues to move east onto the northwest coast.
This pattern will maintain a dry and stable westerly flow across the
area through the day. The upper trough will continue east across
Washington and Oregon Wednesday then slowly weaken as it moves east
across the northern rockies Wednesday into Thursday. Increasing
southwest flow ahead of this feature over the Great Basin will
create breezy and rather dry conditions for the western and southern
portions of the fire district. A cold front associated with the
Pacific northwest weather system will also sweep south across Utah
late Wednesday through Thursday. Low relative humidity along with
sufficiently strong winds may create hazardous fire weather
conditions for Wednesday...and likely into Thursday across southern
Utah...if fuel moistures lower. As of today...fuel moisture levels
were still high enough that critical fire weather conditions are not
expected.

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Slc watches/warnings/advisories...
Utah...none.
Wyoming...none.
&&

$$

Seaman/Young

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