Scientific Forecaster Discussion
Area forecast discussion
National Weather Service Salt Lake City Utah
959 am MST Friday Jan 30 2015
Synopsis...a developing upper low over the southern Great Basin
will spread moisture into Utah through Saturday. The deepest
moisture will remain primarily over central and southern Utah.
Discussion...currently there is an extensive cloud shield across
the entire County Warning Area with the lowest ceilings and light precipitation
from about Nephi to price southward. As the day GOES on this
precipitation should shift farther northward east of the Wasatch
Range and into the western Uinta Basin and Uinta Mountains. The
main circulation is located over Southern California with an
inverted trough angled northeastward up through central Utah. To
the east of this trough axis there is deep moisture with a
southeast to east flow favoring the upslope side of the higher
terrain from Salt Lake City southward to Saint George. Therefore
expect the heaviest precipitation to occur east of this axis with lighter
precipitation over western Utah. The snow level is expected to remain
near 6500-7000 feet through today and tonight as models have been
consistent with keeping the 700mb temperatures between -2 and -4c. Udot
Road cameras support this snow level elevation with snow showing
up on roads such as Indian Canyon Summit...Soldier
Summit...Strawberry Reservoir...and along I-70 over the San Rafael
Made a few minor updates to today forecast to lower the temperatures a
few degrees over mainly the southern and central portions of the
County Warning Area where precipitation should keep the temperatures from rising much
through the afternoon hours. Also increased the probability of precipitation some in the
Heber...Park city...price and western Great Basin region as
precipitation has occurred already and was either reported by
recent surface observation or seen on cameras.
Rest of package looks on track with no updates required.
Aviation...VFR conditions will prevail at the slc terminal through
today with ceilings mostly hovering around 5000 feet. There is a 40
percent chance of MVFR visibilities in haze at times through 00z. Winds
will remain out of the north until 03-04z or possibly later.
Utah...Winter Weather Advisory until 4 PM MST Saturday for utz010-013-
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