FNUS75 KSLC 202025

FWSSLC



Spot Forecast for Widemouth 2...Forest Service

National Weather Service Salt Lake City UT

225 PM MDT Sun Sep 20 2026



Forecast is based on forecast start time of 0600 MDT on September 21. 

If conditions become unrepresentative...contact the National Weather

Service.



.DISCUSSION...Dry and stable conditions with light and diurnally driven

winds will gradually transition into a more unstable pattern late

Monday into Tuesday as an area of low pressure moves into the 

Great Basin. Showers and Thunderstorms will develop across 

southwestern Utah Monday evening and gradually move to the north 

through the day on Tuesday. These showers and storms will be 

moving from south to north at a pretty fast pace so that will 

limit flooding to areas that experience storms moving over the 

same area or under the heaviest storms that could produce 

.5-1"/hour rainfall rates. Gusty and erratic winds along with hail

and frequent lightning will also be possible. Conditions will 

become more dry and stable overnight Tuesday into Wednesday as 

this low pushes off to the northeast. Mostly dry conditions will 

persist for the remainder of the week with moisture staying 

confined to southeastern Utah.



.MONDAY...



Sky/weather.........Partly cloudy (45-55 percent cloud cover). 

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

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

Chance of lightning.0 percent. 

Max temperature.....81-84. 

Min humidity........30-33 percent. 

Wind (20 ft)........Light (2-5 mph) upslope flow. 

Mixing height.......8000 ft AGL (70-80th Percentile). 

Transport winds.....South 7 to 10 mph. 



.MONDAY NIGHT...



Sky/weather.........Partly cloudy (60-70 percent cloud cover). 

                    Chance of rain showers and thunderstorms overnight.

CWR.................25 percent. 

Chance of pcpn......60 percent. 

Chance of lightning.10 percent. 

Min temperature.....55-58. 

Max humidity........75-78 percent. 

Wind (20 ft)........Light drainage flow winds 2 to 6 mph. Gusty 

                    and erratic winds expected near thunderstorms 

                    overnight. 

Mixing height.......500 ft AGL. 

Transport winds.....South around 10 mph. 



.TUESDAY...



Sky/weather.........Partly cloudy (60-70 percent cloud cover) then 

                    becoming mostly cloudy (75-85 percent cloud 

                    cover). Chance of rain showers and thunderstorms. 

CWR.................40 percent. 

Chance of pcpn......70 percent. 

Chance of lightning.26 percent. 

Max temperature.....76-79. 

Min humidity........55-58 percent. 

Wind (20 ft)........Southeast winds 2 to 7 mph becoming southwest 3 

                    to 8 mph with gusts to around 16 mph in the 

                    afternoon. Gusty and erratic winds expected 

                    near thunderstorms. 

Mixing height.......6500 ft AGL (50-60th Percentile). 

Transport winds.....South 9 to 14 mph. 



$$

Forecaster...Mahan

Requested by...Sierra Sampson

Type of request...WILDFIRE

.TAG 2622195.0/SLC

.DELDT 09/20/26

.FormatterVersion 2.0.0

.EMAIL sierra.sampson@usda.gov