textproduct: Salt Lake City

KEY MESSAGES

- Freeze conditions will impact many Utah valleys Tuesday morning across central and southwest Utah and portions of northern Utah. More localized freeze conditions will continue for Wednesday morning. - Temperatures will gradually warm for the remainder of the week, reaching values up to 10F above seasonal normals by Saturday. Conditions will be generally dry, with the exception of northeast portions of the forecast area on Thursday.

DISCUSSION

Utah will remain under a cyclonic flow aloft with high pressure over the Pacific and a mean trough positioned over the north-cenral CONUS through late week. Generally weak impulses are expected to ripple through the area during this time, maintaining isolated to widely scattered diurnal showers over mainly the higher terrain until a stronger trough Thursday brings an increased chance of precipitation, focusing mainly across northeast Utah and southwest Wyoming.

While temperatures will generally see a gradual warming trend across most areas through the week, the airmass will remain cold enough that as skies trend clearer tonight, effective radiative cooling will bring freezing temperatures to many valleys across central and southwest Utah and locally across northern Utah. Freezing conditions can be expected again Tuesday night/Wednesday morning, but likely across a more limited area.

Models are coming into better agreement with the Thursday feature, as it brings a cold front into Utah beginning late Wednesday night/Thursday morning through Thursday afternoon. The best dynamics and associated precipitation will be confined to areas north of the jet, comprising around the northeastern third of the forecast area. With a warmer airmass, snow levels will not be as low as with the previous storm, and looks to be in the 8-9kt range. At this time, precipitation not expected to be particularly significant, as even at the 75th percentile, the NBM remains under 0.35 inches for QPF, and under 3 inches for snow (mainly in the Uintas).

One more weak trailing wave for Friday may bring a few more additional weak showers, then high pressure looks to increase over the area during the weekend into early next week.

REST OF UTAH AND SOUTHWEST WYOMING

VFR conditions will persist for the entire airspace through the period. Conditions will remain dry with skies clearing overnight. Winds will become light this evening with and easterly/northerly component persisting for most terminals overnight before becoming diurnally driven during the day.

FIRE WEATHER

Generally dry conditions are expected to prevail for the remainder of the week. However, this will be briefly interrupted on Thursday as a grazing trough brings generally light precipitation to northeast Utah, with some local wetting rain potential across the northern mountains. Temperatures will gradually warm over the next several days, with highs averaging 10F above seasonal normals by the upcoming weekend.

SLC WATCHES/WARNINGS/ADVISORIES

UT...Freeze Warning from midnight tonight to 9 AM MDT Tuesday for UTZ103-106>108-114>116-118>120-122.

WY...None.