Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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209
FXUS65 KSLC 201533
AFDSLC

Area Forecast Discussion
National Weather Service Salt Lake City UT
933 AM MDT Sun Aug 20 2017

.SYNOPSIS...Southerly flow aloft next week will bring an increase
in mid-level moisture, leading to increasing showers and
thunderstorm chances by midweek. Eclipse viewing will likely be
hampered by clouds in southern Utah.

&&

.DISCUSSION...Scattered showers and isolated thunderstorms have
flared up across southern Utah this morning as the upper level low
off southern Cal is turning the flow more southerly across that
part of the state. PW values are generally less than 0.75 of an
inch across the CWA today with the exception of increasing to 0.90
of an inch near the Arizona border during this afternoon. The
forecast of keeping scattered showers and thunderstorms in across
the southern mountains this afternoon looks good as the 700-500
theta-e ridge is the strongest there by 00z with some
perpendicular flow into it. The Uintas and Bookcliffs have a
secondary maxima in the theta-e ridge which should support some
showers and thunderstorms this afternoon as well.

The only update this morning was to lower the PoPs at Green River
and Price this morning as this is where there is a theta-e trough.

&&

.AVIATION...Southerly winds will continue at the SLC terminal,
shifting to the northwest between 18-20Z.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...None.
WY...None.
&&

$$

PUBLIC...Struthwolf
AVIATION...

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For frequently asked questions about the Area Forecast Discussion
visit...
http://weather.gov/saltlakecity/general/afd_faqs.php



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