Draper, Utah 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

161
FXUS65 KSLC 232130
AFDSLC

Area Forecast Discussion
National Weather Service Salt Lake City UT
330 PM MDT Fri May 23 2025

.SYNOPSIS...Southwesterly winds across southern Utah will weaken
as a weak boundary over central Utah continues to dissipate.
Two pieces from a splitting trough will cross the area Saturday
into Sunday, bringing a slight decrease in temperatures and
scattered showers, primarily for northern Utah on Saturday,
expanding across southern Utah on Sunday.

&&

.SHORT TERM (Through 12Z/6AM Sunday)...Breezy southwesterly winds
are still in place across southern Utah, south of a remnant
baroclinic zone still barely in place across central Utah. Gusts
to 20-25 mph have been observed in most areas, with a few isolated
gusts to 30 mph, resulting in marginal fire weather concerns.
Temperatures are a few degrees cooler than yesterday across
northern Utah, though still lingering just above normal for late
May.

We will start to see a slight increase in moisture heading into
the weekend beginning with high clouds tonight, owing to a
splitting storm system just upstream over the Great Basin. The
northern piece of this trough will graze across the UT-ID border
early Saturday, likely producing a few isolated showers overnight
tonight and providing some extra lift for isolated to scattered
shower/thunderstorm development Saturday afternoon over northern
UT/southwest WY. These showers will be capable of producing gusty
and erratic outflow winds given a dry sub-cloud layer and modest
instability, with the HREF max reaching as high as 40 mph over the
West Desert and Uinta Co., WY. The southern piece of the
splitting trough will then begin to shift into southwestern UT
early Sunday morning, producing a slight decrease in temperatures.

.LONG TERM (After 12Z/6AM Sunday), Issued 352 AM MDT...
The axis of a splitting
trough will be centered over Utah to start the period on Sunday.
This splitting trough will help to initiate some diurnal
convection, primarily across the terrain of central and northern
Utah during the day on Sunday. It`s starting to look like this
will be a rinse-and- repeat pattern throughout most of the
remainder of the long term period as another trough splits to our
west with a weak cutoff low meandering across the Great Basin
through the end of the week before more significant warming aloft
commences as a broad ridge builds across the western CONUS later
in the week.

This diurnal convection will be limited in strength given weak
instability profiles. The primary threat with this convection will
be lightning with the potential for some gusty outflow winds. QPF
will also be limited given that moisture will primarily be confined
to the mid and upper levels. This will certainly be the case the
further south you go. One of the biggest benefits of this pattern
will be that it will cap diurnal maxes from getting too abnormally
hot. Conditions will still be warmer than normal, but now conditions
look to be ~10 degrees above normal for most of next week rather
than 15 degrees above normal which looked to be the case in previous
forecasts. However, by the end of the week the closed low progresses
further east and temperatures begin to warm even more with the
potential for our first 90 degree day of the year at KSLC by the end
of next week into the weekend.

&&

.AVIATION...KSLC...Mid-to-high level cloud cover to increase this
afternoon into Saturday, but otherwise VFR conditions prevail
through the remainder of the TAF period. The northerly lake breeze
continues through around 04z, becoming lighter out of the west-
northwest thereafter.

.REST OF UTAH AND SOUTHWEST WYOMING...VFR conditions prevail for all
regional terminals through the remainder of the TAF period. High
pressure yields continued dry conditions, with increasing mid-to-
high level clouds this afternoon into Saturday. Winds remain
generally light across a majority of the airspace, except for
some increased gusts for central and southern Utah terminals this
afternoon.

&&

.FIRE WEATHER...Relative humidity will increase slightly heading
into the weekend, first across northern Utah with minimum RH
increasing to 15-25 percent on Saturday and up to 25 percent in
the southern mountains by Sunday. With increasing moisture,
scattered showers and isolated thunderstorms will develop over
higher terrain on Saturday afternoon across the northern half of
Utah, with gusty and erratic outflow winds up to 20-30 mph likely
(10 percent chance of exceeding 45 mph). These thunderstorms will
expand across southern Utah by Sunday afternoon, with the most
coverage across higher terrain.

Daily shower and thunderstorm chances will continue into next
week, mainly across northern Utah, despite a slight warming and
drying trend beginning Monday. Chances of wetting rain next week
will remain low.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...None.
WY...None.
&&

$$

SHORT TERM/FIRE WEATHER...Cunningham
LONG TERM...Mahan
AVIATION...Whitlam

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