202
FNUS75 KSLC 021125
FWSSLC
SPOT FORECAST FOR BLACK CANYON FIRE...RIST
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
525 AM MDT WED SEP 2 2026
FORECAST IS BASED ON FORECAST START TIME OF 0600 MDT ON SEPTEMBER 02.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
MUCH DRIER AND BREEZIER CONDITIONS ARE EXPECTED OVER THE FIRE
AREA TODAY AS A DRIER AIRMASS BEGINS WORKING INTO THE REGION.
WHILE HUMIDITY WILL FALL BY UPWARDS OF 25-30 PERCENT AS COMPARED
TO YESTERDAY, A SMALL AMOUNT OF MOISTURE WILL REMAIN IN PLACE AND
BRING THE POTENTIAL FOR ISOLATED SHOWER AND THUNDERSTORM
DEVELOPMENT AFTER 1200. STORMS ARE EXPECTED TO BE FAST MOVING AND
WILL FORM OVER THE HIGH RIDGELINE TO THE WEST AND SOUTHWEST OF THE
FIRE. STRONG WINDS ARE ALREADY EXPECTED TO BE IN PLACE ON THE
HIGHER RIDGES, WITH THESE WINDS SPREADING TO THE LOWER ELEVATIONS
AFTER ABOUT 1000. PEAK WINDS WILL BE OUT OF THE WEST TO SOUTHWEST
WITH SUSTAINED SPEEDS AROUND 20-25 MPH GUSTING TO AROUND 30-35
MPH. WINDS WILL REMAIN ELEVATED DURING THE OVERNIGHT HOURS,
ESPECIALLY ON RIDGETOPS AND UPPER SLOPES. CONDITIONS DRY FURTHER
ON THURSDAY, WITH ANOTHER DROP OF ABOUT 10 PERCENT ANTICIPATED
ALONGSIDE LARGELY CLEAR SKIES. STRONG WINDS WILL ALSO REMAIN IN
PLACE, THOUGH SPEEDS WILL COME DOWN BY ABOUT 5 MPH.
TODAY
SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT CLOUD COVER) THEN
BECOMING PARTLY CLOUDY (30-40 PERCENT CLOUD
COVER). ISOLATED SHOWERS AND THUNDERSTORMS POSSIBLE
AFTER 1200.
CWR.................5 PERCENT.
CHANCE OF PCPN......20 PERCENT.
CHANCE OF LIGHTNING.20 PERCENT.
MAX TEMPERATURE.....UPPER ELEVATIONS (~10,000FT): 55-60.
LOWER ELEVATIONS ( ~7,500FT): 65-67.
MIN HUMIDITY........37-41 PERCENT.
WIND (20 FT)........RIDGES AND UPPER SLOPES: SOUTHWEST AROUND 10-15 MPH, INCREASING
TO 18-23 MPH WITH GUSTS TO 30-35 MPH AFTER 1000-1100.
LOWER SLOPES AND DRAINAGES: DOWNSLOPE 5-8 MPH BEFORE 1000,
THEN BECOMING SOUTHWEST 7-12 MPH WITH GUSTS UP TO 25 MPH.
MIXING HEIGHT.......8700 FT AGL (60-70TH PERCENTILE).
TRANSPORT WINDS.....SOUTHWEST AROUND 25 MPH.
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT CLOUD COVER).
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
CHANCE OF LIGHTNING.2 PERCENT.
MIN TEMPERATURE.....37-42.
MAX HUMIDITY........AROUND 40 PERCENT.
WIND (20 FT)........RIDGES AND UPPER SLOPES: WEST TO SOUTHWEST WINDS 20 TO 25 MPH.
**HIGHEST EXPOSURE RIDGES MAY SEE WINDS UP TO 35 MPH.
LOWER SLOPES AND DRAINAGES: WEST TO SOUTHWEST WINDS AROUND 15 MPH
WITH OCCASIONAL GUSTS TO 25 MPH ON LOWER AND MIDDLE SLOPES.
TRANSPORT WINDS.....SOUTHWEST 13 TO 22 MPH.
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT CLOUD COVER).
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....UPPER ELEVATIONS (~10,000FT): 57-62.
LOWER ELEVATIONS ( ~7,500FT): 67-69.
MIN HUMIDITY........27-32 PERCENT.
WIND (20 FT)........RIDGES AND UPPER SLOPES: SOUTHWEST AROUND 15 MPH WITH GUSTS
UP TO 25-30 MPH.
LOWER SLOPES AND DRAINAGES: SOUTHWEST AROUND 10-15 MPH WITH
GUSTS TO 25 MPH.
MIXING HEIGHT.......8500 FT AGL (60-70TH PERCENTILE).
TRANSPORT WINDS.....SOUTHWEST 14 TO 20 MPH.
FORECASTER...WEBBER
REQUESTED BY...RUTH KOHLER
TYPE OF REQUEST...WILDFIRE
.TAG 2621050.0/SLC
.DELDT 09/02/26
.FORMATTERVERSION 2.0.0
.EMAIL JEREMY_HRUSKA@FIRENET.GOV,ANTHONY_COLLINS@FIRENET.GOV,RUTH_KOHLER@USDA.GOV,JOHN_PELL@FIRENET.GOV
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