Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 181618

Area Forecast Discussion
National Weather Service Salt Lake City UT
1018 AM MDT Sun Mar 18 2018

.SYNOPSIS...The cold storm system will gradually move east of the
area by tonight. In its wake, high pressure aloft will return for
the first half of next week and bring a warming trend to the
region, before another storm system approaches for the latter half
of the week.


.DISCUSSION...Upper level circulation appears to be near Lake
Powell this morning with a broad area of upper level divergence
across eastern Utah. The only area still receiving accumulating
snow seems to be across the Book Cliffs while across the rest of
the mountains the widespread snow has more or less ended with
only scattered snow showers occurring. The western and southern
valleys have seen rapid improvement past hour or two as well.
Consequently, have either allowed to expire or canceled all Winter
Weather Advisories for the CWA as of 10 am.

The 500mb cold core is currently over eastern Nevada and is
forecast to swing east or northeast across Utah this afternoon.
This will create unstable conditions in the somewhat moist air
mass across the northern portions of the CWA this afternoon, while
the 500mb temps will be warming over the southwest and southern
portions of the CWA, creating stable conditions. Therefore, have
backed off the PoPs over these southern areas for late this
morning and afternoon while maintaining the higher PoPs across the

Winds are the main issue for downslope areas between Fremont
Junction and Price today as the surface gradient and the 700mb
winds increase. Could see some gusts near 50 mph but they should
be very localized so at this time have decided against issuing a
wind advisory. Will update this if it becomes an issue.

Overall, the forecast package has most things covered well so only
minor tweaks were made.


.AVIATION...VFR conditions are expected at the SLC terminal
throughout the day, with cigs dropping to or below 6000 feet AGL
during the afternoon with showers in the vicinity of the terminal.
There is a 30 percent chance of IFR/MVFR conditions in snow
showers this afternoon. Northwest winds are expected throughout
the day with a shift to the southeast by 03Z.





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