242
FXUS65 KSLC 312055
AFDSLC
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
255 PM MDT FRI OCT 31 2025
SYNOPSIS
HIGH PRESSURE WILL REMAIN ACROSS THE REGION, BRINGING
A GENERAL WARMING TREND THROUGH EARLY NEXT WEEK. A COLD FRONT WILL
CROSS THE AREA THURSDAY INTO FRIDAY, BRINGING THE NEXT THREAT OF
PRECIPITATION TO NORTHERN UTAH.
DISCUSSION
ONE OF THE NICER HALLOWEEN EVENINGS IN RECENT YEARS
IS EXPECTED ACROSS THE BEEHIVE STATE..WITH NEAR NORMAL
TEMPERATURES AND LIGHT WINDS. EARLY AFTERNOON UPPER AIR AND
SATELLITE ANALYSIS INDICATES NORTHWEST FLOW CONTINUES THIS
AFTERNOON. AN UPPER LEVEL LOW IS SHIFTING SOUTH ALONG THE SOUTHERN
CALIFORNIA COAST. MEAN UPPER LEVEL RIDGING IS SHIFTING EAST INTO
THE SOUTHWEST.
VALLEY INVERSIONS WILL REMAIN IN PLACE THROUGH THE WEEKEND ACROSS
NORTHERN UTAH. CURRENT GUIDANCE SUGGESTS LOW CHANCES (<10%) OF
HAZE REDUCING VISIBILITY BELOW 6SM...WHICH IS NOT SURPRISING GIVEN
THE LATE OCTOBER/EARLY NOVEMBER SUN ANGLE. FOR THE LATEST AIR
QUALITY INFORMATION, PLEASE VISIT AIR.UTAH.GOV. YELLOW/MODERATE
CONDITIONS ARE FORECAST TO PERSIST FOR SALT LAKE, UTAH, AND DAVIS
COUNTY THROUGH SUNDAY, WITH ADDITIONAL MONITORED NORTHERN VALLEYS
DEGRADING TO YELLOW/MODERATE SATURDAY.
THE PREVIOUSLY MENTIONED UPPER LEVEL LOW WILL SHIFT ACROSS UTAH
LATER SUNDAY INTO MONDAY...THOUGH THIS WILL LARGELY BE A CLOUD
STORM AT BEST. THE NEXT LEGITIMATE SHOT FOR PRECIPITATION IS
THURSDAY INTO FRIDAY...AS A DEEPER TROUGH MOVES THROUGH THE
REGION. THE HIGHEST CHANCE FOR SIGNIFICANT PRECIPITATION WILL BE
ACROSS NORTHERN UTAH. TIMING AND INTENSITY DIFFERENCES CONTINUE
ACROSS THE ENSEMBLE SUITE...WITH AROUND 15% OF MEMBERS (EC HEAVY)
SHOWING AN ALMOST DRY FRONT, WHEREAS AROUND 20% OF THE MEMBERS
SHOW A HEAVIER, MORE PROLONGED FRONTAL BAND. THE MEDIAN 65% ARE
SUGGESTING A FRONTAL BAND WITH AROUND 0.10-0.20" OF PRECIPITATION
FOR THE NORTHERN VALLEYS, 0.20-0.40" FOR THE MOUNTAINS, WITH UP TO
0.50-0.60" FOR THE MORE FAVORED LOCATIONS OF THE UPPER
COTTONWOODS. SNOW LEVELS WILL FAVOR VALLEY RAIN/MOUNTAIN SNOW,
WHICH WOULD TRANSLATE INTO A GENERAL 2 TO 5 INCHES FOR THE
NORTHERN MOUNTAINS, LOCALLY UP TO 8 INCHES IN THE UPPER
COTTONWOODS. SOMETHING TO KEEP MONITORING AS GUIDANCE HAS BEEN
UNDULATING BETWEEN THE STRONGER, WETTER SOLUTIONS AND THE DRIER
SOLUTIONS. THIS IS PRETTY COMMON WITH THE ENSEMBLES IN THE LONGER
RANGE WITH A TROUGH CRASHING INTO A FAIRLY STOUT UPPER LEVEL
RIDGE.
AVIATION...KSLC
VFR CONDITIONS CONTINUE AT THE KSLC TERMINAL
THROUGH THE TAF PERIOD. CLEAR SKIES THIS AFTERNOON GIVE WAY TO
INCREASING HIGH CLOUDS THIS EVENING AND OVERNIGHT. LIGHT NORTHERLY
WINDS ARE EXPECTED TO TRANSITION SOUTHEASTERLY AFTER ROUGHLY 03Z
THIS EVENING.
REST OF UTAH AND SOUTHWEST WYOMING
DRY CONDITIONS ACROSS THE
AIRSPACE YIELDS VFR CONDITIONS AT ALL REGIONAL TERMINALS THROUGH
THE TAF PERIOD. HIGH-LEVEL CLOUDS BEGIN TO MOVE IN FROM THE
NORTHWEST THIS EVENING AND OVERNIGHT. EXPECT LIGHT, DIURNALLY
DRIVEN WINDS TO CONTINUE FOR ALL TERMINALS.
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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