textproduct: Salt Lake City

KEY MESSAGES

- Valley rain and mountain snow will continue through the day with a lull tonight before more precipitation moves in on Monday with the threat of some more convective activity.

- Freezing temperatures will return for some Utah valleys Tuesday and Wednesday morning.

DISCUSSION

Radar returns and activity have been paltry across Tooele and Salt Lake valleys this morning as southerly flow has led to some downsloping. However, other locations, such as the northern Utah county and the northern Wasatch Front don't have to deal with this problem. These locations have picked up 0.25 to as much as 1.00 inches of rain so far. The storm is far from over though as it is pivoting across the Wasatch Front. As it does so, our southerly winds will gradually transition to more westerly/northwesterly and areas that have missed out will start to fill in. Mountain snow has generally be across elevations above 8000 feet with accumulating snow primarily above 9000 feet. Heavier cells, with some embedded convection, have resulted in quick road slush ups. But as the rates come down with these road snow should quickly dissipate.

A lull in precipitation will start around 6pm as the low ejects to the east, but another trough will be moving into the Great Basin with widespread precipitation forming by Monday morning. Current guidance shows a line of heavier precipitation developing from Dugway up through Salt Lake and into southwest Wyoming that will push to the east throughout the day. Instability appears to be slightly better tomorrow afternoon that could lead to some stronger convection that could produce some gusty winds and frequent lightning. Snow levels will also drop down to 6500 to 7000 feet as H7 temperatures drop closer to -5C. This will allow for some quick slush ups on mountain routes, primarily above 8000 feet. A bulk of precipitation will push out by Tuesday, but diurnal showers will remain across the northern zone through Thursday as shortwaves round the base of the trough across southern Canada.

As colder air moves in behind this second trough, freezing conditions will return to some Utah valleys Tuesday and Wednesday morning. Tuesday morning will see the widespread freezing conditions with most central/southwestern, and eastern valleys experiencing freezing conditions. Slightly warmer temperatures on Wednesday morning will limit the freezing temperatures to areas across Sanpete/Sevier valleys and the western Uinta Basin.

Drier and warmer conditions will return by the end of the week and into the weekend as low amplitude ridge builds across the area.

REST OF UTAH AND SOUTHWEST WYOMING

Widespread precipitation with areas of MVFR CIGS/VIS will continue across the northern terminals through much of Sunday. Heavier areas of rain, particularly north of I-80, may result in IFR CIGS/VIS at times. A gradual improvement in conditions can be expected by late afternoon. Southern Utah terminals will see improving conditions by mid afternoon.

SLC WATCHES/WARNINGS/ADVISORIES

UT...None. WY...None.