Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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000
FXUS65 KSLC 231606
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1006 AM MDT SUN AUG 23 2015

.SYNOPSIS...A RIDGE OF HIGH PRESSURE WILL BUILD OVER THE REGION AND
PERSIST INTO EARLY NEXT WEEK. MOISTURE WILL SPREAD NORTHWARD ACROSS
THE AREA MIDWEEK...WITH A SERIES OF UPPER LEVEL DISTURBANCES ALSO
ROTATING ACROSS THE REGION.

&&

.DISCUSSION...A RIDGE REMAINS IN PLACE OVER THE GREAT BASIN THIS
MORNING. A SHARP MOISTURE GRADIENT IS IN PLACE WITH DRY AIR OVER THE
NORTHERN THIRD OF UTAH AND HIGHER PWAT AND DEWPOINTS ACROSS
SOUTHERN/CENTRAL UTAH. A WEAK DISTURBANCE CURRENTLY OVER SOUTH-
CENTRAL UTAH IS PROGGED TO LIFT NORTHEAST. THIS WAVE IS ALREADY
PRODUCING A FEW SHOWERS ACROSS THE SOUTHEAST THIS MORNING. AS THIS
WAVE LIFTS NORTH...EXPECT MOISTURE TO SPREAD NORTHWARD THROUGH THE
DAY. CONVECTIVE SHOWERS ARE EXPECTED TO DEVELOP MAINLY OVER THE
MOUNTAINS AND EAST AS A RESULT.

OTHERWISE...TEMPERATURES WILL CLIMB UNDERNEATH THE BUILDING RIDGE. AS
FOR THE SMOKE...IT WILL START TO THIN TODAY AS THE FLOW NO LONGER
TAPS THE ORIGINS ACROSS THE PACNW STATES...BUT WEAK FLOW/MIXING WILL
MEAN THAT IT WILL TAKE ANOTHER DAY OR TWO TO COMPLETELY EVACUATE IT
FROM THE AREA.

UPDATED THE FORECAST TO ADJUST POP/SKY AND TO DECREASE WINDS FOR A
FEW ZONES.

&&

.AVIATION...THE SLC TERMINAL WILL SEE VFR CONDITIONS THROUGHOUT THE
DAY WITH MOSTLY CLEAR SKIES. SMOKE WILL PERSIST AND COULD DROP
VISIBILITIES TO AROUND 6SM AT TIMES THIS AFTERNOON. LIGHT SOUTHEAST
WINDS ARE EXPECTED TO SHIFT TO THE NORTHWEST BY 19Z.

&&

.FIRE WEATHER...HIGH PRESSURE WILL CONTINUE TO BUILD OVER THE
DISTRICT FOR THE NEXT FEW DAYS...RESULTING IN A WARMING TREND IN
TEMPERATURES. LIGHT SOUTHWEST FLOW HAS ALLOWED MOISTURE OVER
SOUTHERN UTAH TO SPREAD NORTHWARD. BECAUSE OF THIS...THE THREAT OF
AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS WILL EXTEND INTO
NORTHERN UTAH TODAY. AN INCREASINGLY WESTERLY FLOW ALOFT WILL BRING
SOME DRIER AIR INTO THE DISTRICT TOMORROW...DECREASING COVERAGE OF
SHOWERS AND THUNDERSTORMS A BIT. MONSOONAL MOISTURE IS EXPECTED TO
SPREAD BACK INTO THE AREA BEGINNING TUESDAY...INCREASING COVERAGE OF
CONVECTION AND BRINGING A BETTER CHANCE OF WETTING RAINS.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...NONE.
WY...NONE.

&&

$$

CHENG/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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