textproduct: Salt Lake City

KEY MESSAGES

- Scattered showers will return to southeast Utah on Saturday and develop across eastern Utah on Sunday as a Pacific low moves across the Desert Southwest.

- A series of storm systems will move through Utah and southwest Wyoming next week, resulting in periods of cooler weather as temperatures stay near or just below seasonal normals. Confidence is low on the timing and other details of specific systems.

DISCUSSION

The piece of a broad Pacific storm system that moved through Utah and southwest Wyoming late night is moving into Canada this evening as the southern branch moves into the Desert Southwest. A few showers linger near the Utah/Idaho border in association with the first piece, but these are rapidly diminishing as the shortwave continues north. Temperatures have been on the cool side today, with maxes running 5-10F below seasonal normals.

The southern branch of the low is on track to slowly move across Arizona on Saturday before turning to the northwest and moving into Colorado on Saturday. This will keep moisture and instability over southern Utah, southeast Utah in particularly, resulting in the development of scattered showers and thunderstorms throughout the day. Overall coverage and duration will be much less than what we saw the past few days, but can't rule out some areas of flash flooding. Once the system starts tracking northeast, the threat of showers will spread across eastern Utah, with the showers primarily focused over the higher terrain east of I-15.

Weak ridging is then expected to move over Utah during the day on Monday, bringing dry conditions with maxes near seasonal normals. However, the storm track over the Pacific coast will remain open (and remain that way throughout the week) in the absence of a Pacific ridge to block incoming systems. Therefore, confidence is high that next week will be wetter than average as a series of storm systems move onshore and track east. However, there remains a good about of ensemble spread with regard to the timing and track of any particular storm system, and therefore confidence remains low with regard to the details about potential impacts for Utah and southwest Wyoming.

AVIATION...KSLC

VFR conditions prevail through the TAF period at KSLC. Periods of variable winds may occur overnight into Saturday morning; overall, winds remain generally light out the northwest through Saturday,

REST OF UTAH AND SOUTHWEST WYOMING...Rain showers are expected to continue moving east along the ID border through this evening, resulting in terrain obscuration around KLGU. Otherwise, VFR conditions prevail for all regional terminals through Saturday with northerly flow developing across most of the airspace overnight.

SLC WATCHES/WARNINGS/ADVISORIES

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