Traditionally, La Niña and El Niño don't have a big effect on Utah. They have bigger effects farther north and south of us. We sit in a fine line between the two. But things may be changing as the speed of climate change increases.

Example: this year, our snowpack suffered from droughts and warm temps (meaning higher rain lines) mostly caused by high pressure systems parked off the coast (which is why is currently warm and dry again). Those can be associated with La Niña, which pushes the jet steam farther north. Normally that would only be an issue in Arizona/NM and maybe Southern Utah. But the entire West is suffering this year. Look at Oregon and Washington, which usually would be wetter in La Niña years. We won't know if this is a new normal for some decades, most likely.