635
FXUS65 KSLC 092144
AFDSLC
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
244 PM MST FRI JAN 9 2026
KEY MESSAGES
- A PROLONGED INVERSION PERIOD WILL SET UP THIS WEEKEND ACROSS THE
NORTHERN VALLEYS AND PERSIST THROUGH AT LEAST THURSDAY. THIS
WILL RESULT IN AN INCREASE IN HAZE, NOCTURNAL FOG, AND A
DEGRADATION IN AIR QUALITY.
DISCUSSION
HIGH PRESSURE CONTINUES TO BUILD INTO THE REGION
THIS AFTERNOON, WITH AREAS OF STRATUS CONTINUING ACROSS PORTIONS
OF NORTHERN UTAH. AS THE SUNSETS THIS EVENING, AREAS WITH SNOW
COVER WILL BE MOST AT RISK FOR DENSE FOG.
THIS WILL BE THE STORY OVER THE WEEKEND AND INTO NEXT WEEK...AS
MID-LEVEL WARM AIR ADVECTION STRENGTHENS VALLEY INVERSIONS. WITH
AN EFFECTIVE LID OVER THE NORTHERN VALLEYS, INCREASING
PARTICULATE CONCENTRATIONS, EVAPORATING SNOW (IN RELEVANT
LOCATIONS) WILL INCREASE HAZE AND DECREASE AIR QUALITY. DENSE FOG
AND/OR STRATUS WILL BECOME AN INCREASING THREAT.
THE BEST CHANCE TO BREAK UP VALLEY INVERSIONS LOOKS TO BE
WEDNESDAY INTO THURSDAY, BUT THIS IS SOMETHING THAT NEEDS TO BE
MONITORED AS GUIDANCE SPREAD IS STILL SIGNIFICANT.
AVIATION...KSLC
GENERALLY LIGHT NORTHWESTERLY WINDS CONTINUE
THROUGH AROUND 02-03Z THIS EVENING, TRANSITIONING TO THE SOUTHEAST
THEREAFTER. INCREASED CLOUD COVERAGE WITH BASES BELOW 6000 FEET
WILL LEAD TO PERIODS OF MOUNTAIN OBSCURATION THROUGH THIS EVENING,
BEFORE CLOUDS DISSIPATE OVERNIGHT.
REST OF UTAH AND SOUTHWEST WYOMING
LIGHT NORTHWESTERLY WINDS
PREVAIL FOR MOST REGIONAL TERMINALS THROUGH THIS EVENING. A LOWER
STRATUS DECK IS PERSISTING OVER THE NORTHWEST PORTION OF THE
AIRSPACE, AND MAY LINGER ACROSS FAR NORTHERN UTAH THROUGH THE
MORNING SATURDAY. OTHERWISE, DRY CONDITIONS WITH CLEAR SKIES
PREVAIL ACROSS THE REMAINDER OF THE AIRSPACE.
SLC WATCHES/WARNINGS/ADVISORIES
UT...NONE.
WY...NONE.
KRUSE/WHITLAM
FOR MORE INFORMATION FROM NOAA'S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY
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