textproduct: Salt Lake City

KEY MESSAGES

- Valley rain and mountain snow showers will continue to diminish through the overnight hours. Periods of unsettled weather will follow through midweek, bringing a few showers to the higher terrain during the afternoon and evening.

- Freezing temperatures will return for many Utah valleys Tuesday and Wednesday mornings.

- Temperatures will warm steadily during the week, with above normal temperatures returning this weekend as high pressure moves in.

DISCUSSION

The frontal boundary that has been stalled over northern Utah is weakening and pushing east this evening with the arrival of some shortwave energy. Thus, coverage of precipitation has diminished considerably, with isolated showers currently focused over western Utah in association with some weak embedded shortwaves. Remaining storms and much of the associated cloud cover is expected to diminish overnight, allowing temperatures to tumble below freezing for many valleys away from the Wasatch Front for Tuesday morning. Going Freeze Warnings cover the current threat well.

Temperatures will begin their warming trend tomorrow, though maxes will average 5F below seasonal normals. Lingering cooler air will bring more freezing temperatures to the Uinta Basin as well as central and southwest Utah valleys. By midweek, however, temperatures will return to near normal for this time of year, substantially decreasing the threat of freezing temperatures for valley locations. Continued unsettled weather will bring a few afternoon showers to the higher terrain, focused over far northern Utah on Tuesday and spreading through the remainder of the northern and central mountains on Wednesday, with much of the guidance showing another weak shortwave moving through.

Confidence is starting to increase in the potential for a more substantial but still relatively weak shortwave to impact the area Thursday. This system would temporarily curb the warming trend and bump the coverage of afternoon convection over the higher terrain into the scattered range, but overall impacts would be relatively limited.

Behind that trough, confidence is higher than usual in the return of high pressure Friday through at least the upcoming weekend. This would move much drier air in and bring more substantial warming, with a high chance of maxes running 10F or more above seasonal normals by early next week.

REST OF UTAH AND SOUTHWEST WYOMING

VFR conditions will persist for the entire airspace through the period. Showers are dissipating with mostly dry conditions (chance of showers <20%) expected across the airspace with CIGs gradually rising and clearing. Winds will be relatively light and diurnally driven.

SLC WATCHES/WARNINGS/ADVISORIES

UT...Freeze Warning until 9 AM MDT Tuesday for UTZ103-114>116-118>120- 122.

Freeze Warning from midnight Tuesday night to 9 AM MDT Wednesday for UTZ114>116-118-119-122.

WY...None.