876
FNUS75 KSLC 272210
FWSSLC
SPOT FORECAST FOR HIGHWAY 150 EVM...USFS
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
410 PM MDT SUN SEP 27 2026
FORECAST IS BASED ON IGNITION TIME OF 0700 MDT ON SEPTEMBER 28.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
THE COMBINATION OF A REMNANT TROPICAL SYSTEM LIFTING
INTO THE AREA ALONG WITH A PASSING COLD FRONT WILL RESULT IN
ACTIVE WEATHER INTO EARLY NEXT WEEK. WINDS AHEAD WILL FAVOR A
SOUTHERLY DIRECTION, WITH OCCASIONAL GUSTS UP TO AROUND 30 MPH
POSSIBLE WITH PASSING SHOWERS/THUNDERSTORMS, AND DURING THE
DAYTIME MONDAY ESPECIALLY IF SUFFICIENT BREAKS IN THE CLOUDS FORM.
WINDS ARE LIKELY TO START TO SHIFT MORE NORTH TO NORTHWESTERLY
LATER MONDAY ON THROUGH THE OVERNIGHT, BECOMING REINFORCED AS THE
COLD FRONT PASSES. GENERALLY, A NORTHERLY WIND DIRECTION WILL THEN
BE FAVORED THROUGH MIDWEEK, BECOMING MORE TERRAIN DRIVEN AS THE
PASSING SYSTEM WASHES OUT AND ITS INFLUENCE BECOMES LESS
PRONOUNCED.
IN TERMS OF PRECIPITATION, SCATTERED RAIN CHANCES WILL GRADUALLY
INCREASE SUNDAY NIGHT INTO MONDAY, BECOMING MORE WIDESPREAD LIKELY
LATER MONDAY INTO EARLY TUESDAY AS THE COLD FRONT PASSES.
ADDITIONALLY, EMBEDDED ISOLATED THUNDERSTORM PROBABILITIES WILL
INCREASE MONDAY AFTERNOON, AND ANY SUCH ACTIVITY WILL CARRY THE
THREAT FOR LIGHTNING, GUSTY ERRATIC WINDS, AND PERIODS OF HEAVIER
RAINFALL. OVERALL WATER TOTALS ARE FORECAST AROUND 0.2" TO 0.3" OF
LIQUID, BUT THUNDERSTORMS MAY RESULT IN LOCALLY HIGHER AMOUNTS.
SOME LIGHT SNOW MAY MIX IN MONDAY NIGHT INTO TUESDAY AS
TEMPERATURES DIP AND FORECAST SNOW LEVELS FALL TO AROUND 11,000 FT.
TEMPERATURES WILL TREND BACK UPWARDS WEDNESDAY ONWARD TOWARDS THE
WEEKEND, BECOMING NEAR NORMAL WEDNESDAY, AND AROUND 5-10 DEGREES
ABOVE NORMAL THURSDAY INTO THE WEEKEND. WHILE OVERNIGHT MAXIMUM
HUMIDITY RECOVERIES ROUGHLY 70% OR HIGHER ARE ALSO FAVORED THROUGH
THIS TIME, DAYTIME MINIMUMS OF AROUND 25-35% WILL LIKELY RETURN
WEDNESDAY AFTERNOON ONWARD. MODELS SUGGEST A LOW PROBABILITY (~10%
CHANCE) OF ANOTHER SYSTEM BRINGING A COLD FRONT SOMEWHERE EARLY
IN THE UPCOMING WEEK.
MONDAY
SKY/WEATHER.........MOSTLY CLOUDY (80-90 PERCENT CLOUD COVER). RAIN
SHOWERS LIKELY IN THE MORNING AND EARLY
AFTERNOON. SLIGHT CHANCE OF THUNDERSTORMS IN
THE LATE MORNING AND EARLY AFTERNOON, THEN RAIN
SHOWERS AND CHANCE OF THUNDERSTORMS LATE IN THE
AFTERNOON.
CWR.................75 PERCENT.
CHANCE OF PCPN......90 PERCENT.
CHANCE OF LIGHTNING.35 PERCENT.
MAX TEMPERATURE.....53-57.
MIN HUMIDITY........70-80 PERCENT.
WIND (20 FT)........SOUTH WINDS 5-10 MPH WITH GUSTS AROUND 20-30
MPHIN THE AFTERNOON. GUSTY OUTFLOW WINDS NEAR
THUNDERSTORMS IN THE LATE MORNING AND
AFTERNOON. WINDS BEGIN TO FAVOR A NORTHERLY
DIRECTION LATE MONDAY AS A COLD FRONT PASSES.
MIXING HEIGHT.......4300 FT AGL (30-40TH PERCENTILE).
TRANSPORT WINDS.....SOUTH AROUND 12 MPH.
CLEARING INDEX......450.
MONDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY (85-95 PERCENT CLOUD COVER).
SLIGHT CHANCE OF THUNDERSTORMS EARLY IN THE
EVENING. RAIN SHOWERS LIKELY IN THE EVENING,
THEN CHANCE OF RAIN SHOWERS OVERNIGHT.
CWR.................40 PERCENT.
CHANCE OF PCPN......70 PERCENT.
CHANCE OF LIGHTNING.15 PERCENT.
MIN TEMPERATURE.....31-35.
MAX HUMIDITY........90-100 PERCENT.
WIND (20 FT)........WINDS FAVORED NORTH TO NORTHWEST AROUND 5-10 MPH
OVERNIGHT.
MIXING HEIGHT.......1000 FT AGL.
TRANSPORT WINDS.....NORTHEAST 8 TO 9 MPH.
TUESDAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT CLOUD COVER) THEN
BECOMING PARTLY CLOUDY (40-50 PERCENT CLOUD
COVER). SLIGHT CHANCE OF RAIN SHOWERS THROUGH
THE DAY. SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
CWR.................5 PERCENT.
CHANCE OF PCPN......20 PERCENT.
CHANCE OF LIGHTNING.15 PERCENT.
MAX TEMPERATURE.....55-60.
MIN HUMIDITY........50-60 PERCENT.
WIND (20 FT)........WINDS GENERALLY FAVOR A NORTHERLY DIRECTION,
GRADUALLY BECOMING MORE TERRAIN DRIVEN
(UPSLOPE DURING THE DAY, DOWNSLOPE DURING
THE NIGHT).
MIXING HEIGHT.......5400 FT AGL (40-50TH PERCENTILE).
TRANSPORT WINDS.....NORTHEAST 10 TO 16 MPH.
CLEARING INDEX......760.
FORECAST DAYS 3 THROUGH 7
WEDNESDAY
MOSTLY CLEAR. LOWS AROUND 30. HIGHS IN THE LOWER 60S. EAST WINDS
AROUND 3 MPH.
THURSDAY
CLEAR. LOWS AROUND 30. HIGHS IN THE MID 60S. SOUTHWEST WINDS
AROUND 3 MPH.
FRIDAY
MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE MID 60S. SOUTH
WINDS AROUND 4 MPH.
SATURDAY
MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE MID 60S.
SUNDAY
MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE MID 60S.
FORECASTER...WARTHEN
REQUESTED BY...THOMAS BOLKE
TYPE OF REQUEST...PRESCRIBED
.TAG 2622470.0/SLC
.DELDT 09/27/26
.FORMATTERVERSION 2.0.0
.EMAIL DAVID.TAMOWSKI@USDA.GOV,SHANE.MCCORMICK@USDA.GOV,THOMAS.BOLKE@USDA.GOV,JASON.BULLOUGH@USDA.GOV,RYAN.TAYLOR@USDA.GOV
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