FNUS75 KSLC 272019

FWSSLC



Spot Forecast for 12 Mile Piles...USFS

National Weather Service Salt Lake City UT

219 PM MDT Mon Oct 27 2025



Forecast is based on ignition time of 0800 MDT on October 28. 

If conditions become unrepresentative...contact the National Weather

Service.



.DISCUSSION...A significant ridge of high pressure will begin building

into the region through the day on Tuesday, persisting throughout

the upcoming week. As such, we'll see poor to fair clearing 

across the area, fueled by low mixing heights and weak transport 

winds. Additionally, persistent high pressure will bring dry 

conditions throughout the week with relative humidity remaining 

relatively low for this time of year as moisture will be lacking. 

Otherwise, expect winds to be generally light and terrain driven 

on both Tuesday and Wednesday alongside clear skies.



.TUESDAY...



Sky/weather.........Mostly sunny (5-15 percent cloud cover). 

CWR.................0 percent. 

Chance of pcpn......0 percent. 

Chance of lightning.0 percent. 

Max temperature.....38-43. 

Min humidity........20-25 percent. 

Wind (20 ft)........Downslope 4-8 mph in the morning, becoming

					upslope/ northwest at 5-8 mph after 1000. 

Mixing height.......1200 ft AGL. 

   Climatology......20-30th Percentile. 

Transport winds.....Northwest around 12 mph. 

Clearing index......200. 



.TUESDAY NIGHT...



Sky/weather.........Mostly clear (5-15 percent cloud cover). 

CWR.................0 percent. 

Chance of pcpn......0 percent. 

Chance of lightning.0 percent. 

Min temperature.....29-32. 

Max humidity........32-34 percent. 

Wind (20 ft)........Downslope 5-8 mph.

Transport winds.....East 6 to 8 mph. 



.WEDNESDAY...



Sky/weather.........Sunny (0-10 percent cloud cover). 

CWR.................0 percent. 

Chance of pcpn......0 percent. 

Chance of lightning.0 percent. 

Max temperature.....47-52. 

Min humidity........18-23 percent. 

Wind (20 ft)........Downslope winds 5-7 mph in the morning, becoming

					upslope 4-8 mph after 1100.

Mixing height.......1800 ft AGL. 

   Climatology......30-40th Percentile. 

Transport winds.....Southeast around 8 mph becoming southwest in 

                    the afternoon. 

Clearing index......190. 



$$

Forecaster...Webber

Requested by...Karson Sorenson

Type of request...PRESCRIBED

.TAG 2524540.0/SLC

.DELDT 10/27/25

.FormatterVersion 2.0.0

.EMAIL ronald.sorenson@usda.gov