So…national weather service has a high pressure zone above four corners forcing some moisture north around Friday. Here the models diverge. One has dry air entering the area on Saturday, which would be nice. The other has moisture (and resulting fall temps) making it to SLC on Saturday. The models seem to agree that Sunday will be wet. The current prediction (what basically all the weather websites use) literally just splits the difference between the models for Saturday, but really it’s a crap shoot. It will be great, or wet (but probably not tears of Brigham bad). Check again in a few days and model may converge. Or read the actual forecast below and form your own opinion.
https://forecast.weather.gov/product.php?site=NWS&issuedby=slc&product=AFD&format=CI&glossary=1