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FNUS75 KSLC 140145
FWSSLC

Spot Forecast for Monroe Canyon...RIFC
National Weather Service Salt Lake City UT
745 PM MDT Sun Jul 13 2025

Forecast is based on forecast start time of 2000 MDT on July 13.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...North to northwest winds will continue to relax through
this evening, becoming light and variable for a time after sunset
and then favoring a more easterly/down-canyon component through
the night. RH recoveries are expected to be quite poor.

After sunrise Monday, winds will once again start to shift and
favor a more northwest to up-canyon directional component, with
magnitudes gradually increasing. By the afternoon, generally
anticipate winds around 7-15 mph with a few gusts 20-25 mph.
Additionally, there is a low (around 10%) chance of some isolated
high-based shower activity to form off the high terrain in the
afternoon, and anything near the burn area would have potential to
produce gusty and erratic outflow winds. Generally expect min RH
values in the low teens.

Winds Monday evening are expected to follow a similar pattern to
that of Sunday, relaxing somewhat and gradually shifting to a more
down-canyon to southeasterly flow. RH recoveries are anticipated
to be slightly better, but still fairly poor overall.

Winds once again shift following sunrise Tuesday, quickly
favoring a more westerly/up-canyon direction. With a weak system
approaching through the Great Basin, anticipate winds increase in
magnitude a bit quicker, with afternoon sustained values around
15-20 mph and gusts around 25-30 mph. Moisture will remain
limited, but sufficient in combination with the approaching system
to result in a bit more coverage of isolated to scattered showers
and thunderstorms during the afternoon. In addition to the threat
of lightning, these will once again carry potential for gusty and
erratic outflow wind gusts with anything near enough to the burn
area.


.REST OF TONIGHT...

Sky/weather.........Clear (0-10 percent cloud cover). Patchy smoke.
Chance of pcpn......0 percent.
Min temperature.....61-63.
Max humidity........15-20 percent.
Wind (20 ft)........North to northwest winds 7-15 mph in the
evening, gradually relaxing and becoming more
easterly/down-canyon around 5 mph.
Mixing height.......0 ft AGL.
Transport winds.....North around 14 mph becoming northeast
                    overnight.

.MONDAY...

Sky/weather.........Mostly sunny (15-25 percent cloud cover).
                    Patchy smoke through the day.
Chance of pcpn......10 percent.
Max temperature.....76-78.
Min humidity........11-16 percent.
Wind (20 ft)........Winds shifting more northwest to up-canyon
after sunrise, increasing to around 5-10
mph by latemorning. Northwest winds
then generally favored through the
afternoon/early evening around 7-15 mph
with a few gusts to around 25 mph possible.
Gusty erratic outflow winds possible with
any isolated high-based shower that
manages to form.
Mixing height.......13000 ft AGL.
   Climatology......95-97th Percentile.
Transport winds.....Northwest 9 to 16 mph.

.MONDAY NIGHT...

Sky/weather.........Mostly clear (25-35 percent cloud cover).
                    Patchy smoke after 3 am.
Chance of pcpn......10 percent.
Min temperature.....62-64.
Max humidity........20-25 percent.
Wind (20 ft)........Northwest winds relax through the evening
hours, becoming more southeasterly/
down-canyon around 3-7 mph overnight.
Mixing height.......11100 ft AGL decreasing to 0 ft AGL overnight.
Transport winds.....Northwest around 15 mph becoming south
                    overnight.

.TUESDAY...

Sky/weather.........Mostly sunny (25-35 percent cloud cover) then
                    becoming partly cloudy (50-60 percent cloud
                    cover). Patchy smoke early in the morning.
                    Chance of showers and thunderstorms in the
                    afternoon.
Chance of pcpn......40 percent.
Max temperature.....77-79.
Min humidity........16-18 percent.
Wind (20 ft)........Winds shift more westerly and increase to
around 5-10 mph after sunrise. From late
morning through the afternoon winds increase
to 15-20 mph with gusts 25-30 mph, and
continue to favor a west to
west-southwesterly direction. Gusty and
erratic winds expected nearthunderstorms
in the afternoon.
Mixing height.......600 ft AGL increasing to 12600 ft AGL in the
                    afternoon.
   Climatology......90-95th Percentile.
Transport winds.....West around 13 mph becoming around 25 mph in
                    the afternoon.

$$
Forecaster...Warthen
Requested by...Kelly Cornwall
Type of request...WILDFIRE
.TAG 2517939.0/SLC
.DELDT 07/13/25
.FormatterVersion 2.0.0
.EMAIL utrfc@firenet.gov