332
FNUS75 KSLC 171147
FWSSLC

Spot Forecast for Last Chance RX...USFS
National Weather Service Salt Lake City UT
547 AM MDT Fri May 17 2024

Forecast is based on ignition time of 0600 MDT on May 17.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...Winds will increase out of the west by midday today
ahead of a cold front. The front will likely weaken before
reaching the burn site this evening. Warm and dry conditions will
persist through late afternoon today, with excellent mixing. As
the front nears during the late afternoon and evening hours, there
is a small potential for weak, high-based showers which could
produce brief gusty and erratic microburst winds but no measurable
precipitation. The front will lift back northward tomorrow as the
flow turns more southwesterly at the burn site. Winds will still
be enhanced, but should be slightly weaker compared to today. The
winds are expected to increase a bit more on Sunday as the next
cold front moves into Utah. This front will bring a threat of
precipitation Monday through Tuesday. At this time, chance of
wetting rain appears small (10% chance or less). This unsettled
weather pattern is expected to continue to result in excellent
mixing conditions at the burn site through the early part of next
week.

.TODAY...

Sky/weather.........Mostly sunny (5-15 percent cloud cover).
CWR.................0 percent.
Chance of pcpn......10 percent.
LAL.................1.
Max temperature.....57-60.
Min humidity........17-20 percent.
Wind (20 ft)........West winds 5-10 mph increasing to 6-13 mph
                    with gusts to 24 mph after noon.
Transport winds.....West winds 20-25 mph.
Clearing index......1000+.
Haines Index........6.

.TONIGHT...

Sky/weather.........Partly cloudy (25-35 percent cloud cover).
                    Slight chance of rain showers in the evening.
CWR.................0 percent.
Chance of pcpn......20 percent.
LAL.................1.
Min temperature.....39-42.
Max humidity........50-53 percent.
Wind (20 ft)........West-northwest winds 6-12 mph with gusts to 24
                    mph decreasing to 5-10 mph after 2200.
Transport winds.....West winds 20-25 mph decreasing to 10-15 mph
                    after midnight.
Haines Index........5.

.SATURDAY...

Sky/weather.........Partly cloudy (55-65 percent cloud cover).
                    Slight chance of rain showers in the morning,
                    then chance of rain showers and slight chance
                    of thunderstorms in the afternoon.
CWR.................5 percent.
Chance of pcpn......40 percent.
LAL.................1 until 1200, then 2.
Max temperature.....56-59.
Min humidity........26-29 percent.
Wind (20 ft)........West winds 5-10 mph becoming southwest 6-12 mph
                    with gusts to around 22 mph in the afternoon.
                    Gusty and erratic winds expected near
                    thunderstorms in the afternoon.
Transport winds.....West-southwest winds 18-23 mph.
Clearing index......1000+.
Haines Index........4.

$$
Forecaster...Cheng
Requested by...Trevor Johnson
Type of request...PRESCRIBED
.TAG 2414456.0/SLC
.DELDT 05/17/24
.FormatterVersion 2.0.0
.EMAIL trevor.johnson@usda.gov