501
FXUS65 KSLC 230430
AFDSLC
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
930 PM MST TUE JAN 22 2019
SYNOPSIS
HIGH PRESSURE WILL REMAIN CENTERED OFF THE PACIFIC
COAST OVER THE NEXT SEVERAL DAYS. A SERIES OF WEAK STORM SYSTEMS
WILL MOVE OVER THE TOP OFF THIS RIDGE INTO UTAH AND SOUTHWEST
WYOMING THROUGH THE END OF THE WEEK, BRINGING LIGHT MOUNTAIN SNOW
ACCUMULATIONS AND TEMPERATURES NEAR SEASONAL NORMALS.
DISCUSSION
UTAH REMAINS UNDER A NORTHWESTERLY FLOW ALOFT THIS
EVENING IN BETWEEN A MEAN LONGWAVE TROUGH OVER THE CENTRAL CONUS AND
A RIDGE OFF THE WEST COAST. A WEAK SHORTWAVE TROUGH IS NOTED ON
WATER VAPOR IMAGERY RIDING OVER THE TOP OF THE RIDGE AND IS
CURRENTLY OVER THE SOUTHERN BRITCOL COAST. WARM ADVECTION HAS
DEVELOPED AT 700MB ACROSS NORTHERN UTAH AND WILL STRENGTHEN THROUGH
THE NIGHT. CURRENTLY, UTAH IS UNDER MOSTLY CLEAR SKIES, WITH A FEW
SMALL PATCHES OF STRATUS OVER CENTRAL UTAH AND SOME HIGH CLOUDS
DRIFTING ACROSS NORTHERN UTAH AND SOUTHWEST WYOMING.
EXPECT STABLE CONDITIONS TO CONTINUE THROUGH THE NIGHT WITH MID AND
HIGH CLOUDS CONTINUING TO INCREASE AHEAD OF THE AFOREMENTIONED
SHORTWAVE TROUGH. PRECIPITATION SHOULD DEVELOP TOWARDS THE MORNING
HOURS ACROSS THE FAR NORTH, WHILE REMAINING IN A WARM ADVECTION
NORTHWESTERLY FLOW. THE TRANSITION TO COLD ADVECTION WILL OCCUR
DURING THE LATE AFTERNOON THROUGH EARLY EVENING HOURS AS THE TROUGH
BEGINS TO MAKE ITS WAY INTO NORTHERN UTAH. THE ASSOCIATED
PRECIPITATION WILL THEN SPREAD SOUTH AND MAKE ITS WAY INTO CENTRAL
UTAH. THE AIRMASS WILL REMAIN COLD ENOUGH TO KEEP PRECIPITATION IN
THE FORM OF SNOW. AMOUNTS WILL REMAIN LIGHT WITH THE BULK OF IT
FALLING OVER THE MOUNTAINS.
THE LARGE-SCALE PATTERN WILL REMAIN LARGELY UNCHANGED THROUGH THE
WEEKEND, AS UTAH WILL REMAIN UNDER A NORTHWESTERLY FLOW ALOFT WITH
WEAK DISTURBANCES CONTINUING TO CROSS THE AREA.
CURRENT FORECAST IN GOOD SHAPE. NO UPDATES THIS EVENING.
AVIATION
OPERATIONAL WEATHER CONCERNS WILL REMAIN MINIMAL AT THE
KSLC TERMINAL THROUGH TONIGHT. SOUTHEAST WINDS WILL PREVAIL THROUGH
THE NIGHT AND ARE LIKELY TO PERSIST THROUGH THE DAY TOMORROW.
CEILINGS WILL BEGIN TO FILL AND LOWER AFTER 12Z WEDNESDAY, LIKELY TO
OR BELOW 6000FT AGL BY 14Z.
SLC WATCHES/WARNINGS/ADVISORIES
UT...NONE.
WY...NONE.
CHENG
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HTTP://WEATHER.GOV/SALTLAKECITY
FOR FREQUENTLY ASKED QUESTIONS ABOUT THE AREA FORECAST DISCUSSION
VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY/GENERAL/AFD_FAQS.PHP
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