St. George, Utah 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

068
FXUS65 KSLC 062152
AFDSLC

Area Forecast Discussion
National Weather Service Salt Lake City UT
Issued by National Weather Service Grand Junction CO
352 PM MDT Tue May 6 2025

.SYNOPSIS...A cool and unsettled pattern will persist into the
middle of the week as a low pressure system slowly moves through
the region. High pressure will bring a warming and drying trend
for the latter portion of the week through the upcoming weekend.

&&

.SHORT TERM (Through 12Z Thursday)...One piece of the Pacific low
has moved into New Mexico this afternoon, with the second piece
making its way into Arizona. Earlier shower activity over northern
Utah has diminished, but showers predictably continue over
southern Utah. The showers will tend to decrease in coverage
overnight, but some could continue into the morning. Maxes have
been just below seasonal normals over northern Utah and about 10F
below with the showers in southern Utah.

Saw some in the way of enhanced downslope winds last night, and
the position of the low will make conditions move favorable
tonight, with a good easterly gradient and cold advection. Have
added the Cache Valley to the Wind Advisory, which already
included the northern Wasatch Front, given the winds the area
received this morning and the continued favorable conditions. That
being said, HREF this afternoon has become less bullish on the
speed of the winds, significantly lowering its chance of 40 plus
mph gusts. However, ingredients remain favorable and guidance does
not always have a good grasp on features of this scale so going
headlines look good.

The second wave with the Pacific system will move out of the area
tomorrow, but showers will still linger, again particularly over
southern Utah. Temperatures will begin their upward trend, with
northern Utah seeing values up to 10F above seasonal normals as
southern Utah moves back to normal for this time of year.

.LONG TERM (After 12z Thursday)...All guidance is in consensus
regarding a broad ridge building across the western CONUS. This
ridge will result in soaring temperatures 15-20 degrees above normal
this weekend along with dry conditions and mostly clear skies. This
ridge is relatively short-lived as a trough moves into the west
early next week. There is some uncertainty regarding the timing of
this trough with ~58% of guidance bringing the trough close enough
to initiate precipitation by late Monday and the remaining guidance
holding off until Tuesday. Regardless, southerly winds will increase
ahead of the trough with very dry conditions, particularly across
the south and western part of the area.

&&

.AVIATION...KSLC...VFR conditions will persist for the KSLC terminal
through the period. Dry conditions will persist with CIGs gradually
rising above ridgetops. Northerly winds will continue through ~05Z
before some easterly canyon winds try to develop and reach the
terminal. Typically these weaker events struggle to reach the
terminal with more of a light and variable wind setup oscillating
between easterly and westerly winds. This will persist throughout
the night.

REST OF UTAH AND SOUTHWEST WYOMING...The northern half of the
airspace will continue drying with CIGs gradually improving. The
southern half will continue to see showers and intermittent MVFR/IFR
through sunset before conditions start to dry out. Easterly canyon
winds develop this evening for the northern Wasatch Front with gusty
easterly winds overnight.

&&

.FIRE WEATHER...Low pressure moving across the Desert Southwest will
continue to bring unsettled conditions, especially for southern
Utah, into Wednesday before exiting. Due to the low, temperatures
will stay on the cool side over southern Utah as they return to
near seasonal normals over northern Utah. Behind the exiting
trough, high pressure will move in for the latter half of the week
bringing dry and increasingly hot conditions.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...Wind Advisory until 4 AM MDT Wednesday for UTZ104-107.

WY...None.
&&

$$

SHORT TERM/FIRE WEATHER...Traphagan
LONG TERM/AVIATION...Mahan

For more information from NOAA`s National Weather Service visit...
http://weather.gov/saltlakecity