Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 160259

Area Forecast Discussion
National Weather Service Salt Lake City UT
859 PM MDT Sun Jul 15 2018

.SYNOPSIS...Drier conditions will push into southern Utah through
Monday morning. A weak weather system will brush by northern Utah
later Monday before high pressure strengthens during the midweek


.DISCUSSION...After another active day across southern
Utah...though much less active than the previous few
days...convection is quickly winding down across the state.
At least one flash flood was reported in Wahweap Creek near Big
Water this evening. Expect the main drainages including
Wahweap...Warm and Last Chance Creek experienced flash flooding
this afternoon and evening.

A weak shortwave passing through the northern Intermountain Region
will bring the threat of at least isolated showers and
thunderstorms to at least northern Utah Monday afternoon and
evening. This will be followed by another elongated upper level
ridge setting up from central California to the four corners
region. Expect moisture to gradually work northward midweek into
the weekend.

Updated pops and sky to better match current conditions otherwise
going forecast is in good shape. No additional updates are


.AVIATION...VFR conditions to continue at the SLC terminal this
evening into tomorrow. Northwest winds will shift to southeast


.FIRE WEATHER...Focus will shift to a progressive upper level
wave tracking in from the Pacific that will translate across
southern Idaho Monday into the overnight hours. Northern portions
of zone 478 and 479 have the greatest potential for widely
scattered thunderstorms Monday evening, with limited rainfall
potential. Due to the progressive nature of this wave, these
storms are expected to be relatively fast moving and mixed mode
between wet/dry, with gusty outflow boundaries possible for a few
hours after the storms pass. There is a slight chance the track of
this wave will focus more of the activity just north into Idaho,
but at this time the potential exists for new lightning starts and
gusty winds in wake for those zones. High pressure is expected to
strengthen midweek allowing for hot and generally dry conditions
across the district.





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