FXUS65 KSLC 272153

AFDSLC



Area Forecast Discussion

National Weather Service Salt Lake City UT

353 PM MDT Mon Oct 27 2025



.SYNOPSIS...Cold air left behind in the wake of the most recent

storm system will bring generally widespread freezing temperatures

outside of southern Utah. High pressure builds back into the

forecast area from Tuesday onward, bringing dry and mild

conditions to all of Utah and southwest Wyoming.



&&



.DISCUSSION...Through the remainder of the evening and overnight 

hours, the trough associated with our most recent mountain 

snowfall event in the northern Utah mountains will depart the

region, leaving the coldest airmass of the fall draped over the

forecast area. As such, we will see generally widespread freezing

temperatures as we head into Tuesday morning (with the exception

of far southern Utah). For most areas, freezing temperatures have

already been achieved early last week throughout at least half of

the zone, however, freeze conditions will become much more

widespread tonight. Additionally, freeze conditions will be seen

in some of the lower elevations of Capitol Reef which have not

already seen freezing temperatures. As such, a Freeze Warning

remains in effect.



Through the day on Tuesday, a ridge of high pressure will begin to

build over the western U.S. which is expected to persist through

the upcoming week. As a result of the ridge, a subsidence

inversion is expected to develop across Utah which will likely aid

in the accumulation of particulate matter along the urban

corridor. For this reason, have maintained "haze" in the

mentionable weather along the Wasatch Front through at least

Wednesday evening. Ensemble guidance does, however, show

potential for a shortwave trough to move through the northern 

Rockies region which may act to tamp down the ridge over Utah, as

well as introduce a dry cold front into northern Utah and

southwest Wyoming Wednesday evening. If the associated cold front

becomes cold enough, temporary relief from the subsidence

inversion may be seen by Thursday.



That said, the aforementioned ridge quickly reestablishes Thursday

forward, bringing continued dry and mild conditions across the

forecast area. Upstream over the northeast Pacific/ Gulf of Alaska,

an area of deep low pressure is expected to remain persistent,

helping to advect a stream of moisture into the west coast of

North America. Depending on the strength and orientation of the

ridge, some of this moisture will have a chance at scraping by the

far northern reaches of the forecast area over the weekend. Even 

then, this possibility is only supported by around 25% of ensemble

members... so odds continue to favor a dry forecast through at

least Sunday, and potential beyond as this ridge becomes the

dominant weather feature over the West.



&&



.AVIATION...KSLC...VFR conditions will persist for the KSLC terminal 

through the period. Dry stable conditions are settling in for the 

evening. Clouds have cleared and will remain clear overnight with 

light northerly winds transitioning to light southerly winds 

overnight.



.REST OF UTAH AND SOUTHWEST WYOMING...VFR conditions will persist 

for the entire airspace through the period. Dry stable conditions 

are settling into the entire area. Skies will be clear overnight 

with light and diurnally driven winds.



&&



.SLC WATCHES/WARNINGS/ADVISORIES...

UT...Freeze Warning from 3 AM to 9 AM MDT Tuesday for UTZ129.



WY...None.

&&



$$



PUBLIC...Webber

AVIATION...Mahan



For more information from NOAA's National Weather Service visit...

http://weather.gov/saltlakecity