Scientific Forecaster Discussion
fxus65 kslc 240428
Area forecast discussion
National Weather Service Salt Lake City Utah
928 PM MST Thu Nov 23 2017
Synopsis...a weak weather disturbance will move east across the
northern rockies tonight which will flatten the strong ridge
across northern Utah. Strong high pressure aloft will return this
weekend, followed by a storm system early next week.
Discussion...a weak shortwave disturbance continues to approach
Utah out of the Pacific northwest this evening. The ridge over Utah has
flattened ahead of this feature and the subtropical moisture plume
has sagged into far northern Utah where light precipitation was
reported along the Idaho border. This moisture will continue to sag
a bit farther south, reaching the central Wasatch and Uinta
Mountains and perhaps the adjacent valleys later tonight. However,
any precipitation is expected to remain light overnight. A bit
better forcing will accompany the trough as it grazes far northern
Utah during the day tomorrow. That being said, any precipitation
will remain confined to northern Utah.
Otherwise, cloud cover tonight will maintain mild overnight mins
across much of the area. Temperatures will be cooler tomorrow owing
to a weak cold front accompanying the trough, but still above normal
for this time of year. High pressure will rebound for the weekend
leading to warmer temperatures once again.
Updated the forecast earlier this evening to boost evening pops. No
further updates expected.
Aviation...VFR conditions will prevail at kslc through the night
and into Friday. Any cigs are expected to remain above 7000 ft.
Northerly or erratic winds this evening should return to a
southeasterly direction by 06z.
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