Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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000
FXUS65 KSLC 010350
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
950 PM MDT MON AUG 31 2015

.SYNOPSIS...WEAK HIGH PRESSURE ALOFT WILL CONTINUE TO BUILD INTO
THE AREA TONIGHT. A WARMER SOUTHWEST FLOW ALOFT WILL DEVELOP
AHEAD OF A PACIFIC NORTHWEST STORM SYSTEM STARTING TUESDAY...AND
WILL PERSIST THROUGH AT LEAST THURSDAY.

&&

.DISCUSSION...A DRIER SOUTHWEST FLOW HAS DEVELOPED OVER THE
FORECAST AREA THIS EVENING. SHOWERS WITH A FEW THUNDERSTORMS
LINGER OVER SOUTHERN UTAH...PRIMARILY ALONG AN OLD FRONTAL
BOUNDARY. THIS CONVECTION WILL TEND TO WEAKEN THROUGH THE LATE
EVENING.

ANOTHER TROUGH IS PROGGED TO MAKE ITS WAY TOWARD THE PACIFIC
NORTHWEST COAST OVER THE FEW DAYS. AS IT CONTINUES
EASTWARD...SOUTHWEST FLOW OVER THE AREA WILL INCREASE AS THE
AIRMASS DRIES. THIS HAS THE POTENTIAL TO PRODUCE CRITICAL FIRE
WEATHER CONDITIONS WHERE FUELS ARE DRY...ESPECIALLY OVER WESTERN
UTAH. SEE THE FIRE WEATHER SECTION FOR MORE DETAILS. WITH THE
DRYING AIRMASS...COVERAGE OF AFTERNOON AND EVENING CONVECTION WILL
TEND TO INCREASE. THE TROUGH IS EVENTUALLY EXPECTED TO MOVE ACROSS
NORTHERN UTAH THIS WEEKEND...BRINGING A POTENTIALLY SIGNIFICANT
COOLDOWN.

NO UPDATES EXPECTED TO THE FORECAST THIS EVENING.

&&

.AVIATION...THE SLC TERMINAL WILL SEE VFR CONDITIONS THROUGH THE
NIGHT WITH MOSTLY CLEAR SKIES. WINDS ARE EXPECTED TO REMAIN
SOUTHEASTERLY THROUGH THE OVERNIGHT HOURS.

&&

.FIRE WEATHER...DRIER AND MORE STABLE AIR HAS STARTED TO MOVE INTO
THE FORECAST AREA TODAY. A FEW SHOWERS ALONG AN OLD BOUNDARY OVER
SOUTHERN UTAH WILL TEND TO DISSIPATE DURING THE LATE EVENING.
COVERAGE OF AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS WILL
SLOWLY DECREASE AS THE WEEK GOES ON AND MORE DRY AIR MOVES INTO
THE AREA. SOUTHWESTERLY WINDS WILL BEGIN TO INCREASE ON
TUESDAY...AND THEN PEAK ON WEDNESDAY AND THURSDAY OUT AHEAD OF AN
APPROACHING STORM SYSTEM. COMBINED WITH DECREASING RELATIVE
HUMIDITY VALUES...LOCALIZED CRITICAL FIRE WEATHER CONDITIONS WILL
BE POSSIBLE...PARTICULARLY ON WEDNESDAY AND THURSDAY.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...NONE.
WY...FIRE WEATHER WATCH FOR WYZ277 FROM 11 AM WEDNESDAY THROUGH 9
PM FRIDAY.

&&

$$

TRAPHAGAN

FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)

FOR FREQUENTLY ASKED QUESTIONS ABOUT THE AREA FORECAST DISCUSSION
VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY/GENERAL/AFD_FAQS.PHP (ALL LOWER CASE)


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