Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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000
FXUS65 KSLC 221704
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1004 AM MST THU JAN 22 2015

.SYNOPSIS...HIGH PRESSURE WILL BUILD INTO THE REGION TODAY. A
VERY WEAK SYSTEM WILL CROSS NORTHEASTERN UTAH FRIDAY. STRONG HIGH
PRESSURE WILL DOMINATE THE WESTERN STATES SATURDAY THROUGH EARLY
NEXT WEEK.

&&

.DISCUSSION...A SHORT WAVE RIDGE IS BUILDING INTO THE CWA TODAY
WITH A DRY STABLE AIRMASS IN PLACE. SKIES ARE CLEAR OVER THE CWA
THIS MORNING AND VALLEY INVERSIONS HAVE FORMED.

THE NORTHERLY SURFACE GRADIENT IS RELAXING AT THIS TIME AND THE
GUSTY DOWNSLOPE WINDS IN WASHINGTON CO ARE DIMINISHING.

THE RIDGE AXIS CROSSES THE CWA TONIGHT AS A VERY WEAK SPLITTING
SHORT WAVE TROF MOVES THRU THE NRN ROCKIES AND GRAZES THE NERN CWA
TOMORROW. THE AIRMASS ALOFT IS WARMING TODAY AND WILL COOL A
LITTLE WITH THE PASSING WAVE TOMORROW BUT THIS WILL NOT HAVE MUCH
IMPACT ON THE DEVELOPING VALLEY INVERSIONS. ABOUT THE ONLY RESULT
OF THE PASSING WAVE WILL BE SOME CLOUDINESS OVER THE NERN ZONES
AND A SMALL CHANCE OF LIGHT SNOW IN THE UINTAS IN THE AFTN.

THE PAC RIDGE THEN BUILDS GRADUALLY INTO THE WESTERN STATES SAT
THRU MON WITH 700 MB TEMPS RISING TO +6C OVER SLC BY 00Z TUE. THIS
SHOULD REALLY PLACE A STRONG CAP ON OUR VALLEY INVERSIONS.

UPDATED FORECASTS EARLIER TO DELAY ONSET OF HIGH CLOUDS INTO THE
NWRN CWA TODAY AND TO ADJUST WINDS. NO ADDITIONAL UPDATES PLANNED.

&&

.AVIATION...WINDS AT THE SLC TERMINAL ARE EXPECTED TO SWITCH TO THE
NORTHWEST BETWEEN 18Z AND 20Z...WITH A SLIGHT CHANCE THAT SOUTHERLY
WINDS PREVAIL THROUGH 21Z. OTHERWISE...VFR CONDITIONS WILL PREVAIL
THROUGH THE TAF PERIOD UNDER MOSTLY CLEAR SKIES.

&&

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

&&

$$

WILENSKY/SCHOENING

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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