546
FXUS65 KRIW 242329
AFDRIW

Area Forecast Discussion
National Weather Service Riverton WY
429 PM MST Sun Nov 24 2024

.KEY MESSAGES...

- Light snow fell across portions of the state this morning with isolated
  snow showers lingering throughout the day today.

- A quiet start to the upcoming holiday week but another
  disturbance may bring another round of mountain snow for
  Tuesday/Wednesday.

- Cooler but mostly quiet weather is expected to prevail for the
  second half of the week into the start of December.

&&

.DISCUSSION...
Issued at 1154 AM MST Sun Nov 24 2024

Light snow fell across portions of the Cowboy State this morning
with locations such as Green River seeing 1 to 2 inches of snowfall
overnight. Sporadic light snow showers will be possible throughout
the day today as the system pulls out of the region. Additional snow
accumulation will be very minimal. Skies will gradually clear out
during that day and into the evening. Cooler but still seasonable
temperatures move in behind the system as it moves out of the area.
Highs today range from the low to mid 30s west of the Divide and
upper 30s to low 40s east of the Divide. Lows tonight will drop down
to the single digits west of the Divide and teens east of the
Divide. One thing to keep in mind is that locations that saw some
snow accumulation on surfaces especially west of the Divide may see
colder temperatures possibly near or below zero.

The upcoming week will start off rather quiet with a brief lull in
the action for Monday. Tuesday will see another disturbance move
inland from the Pacific and make its way eastward. Models are coming
into agreement that much of the impacts will be limited to western
and southern portions of the CWA. The main core of the system will
slide to the south of the state with little to no impacts expected
across central and northern parts of the CWA. Overall, western
mountains can expect another round of snow with accumulations
currently looking to have a greater than 50% chance to exceed 4
inches. Similar to what we saw this weekend, the southern portion of
the CWA is looking like they may see some light snow showers for
Tuesday and Wednesday with minimal snow accumulation expected. As
for central and northern portions of the CWA, little precipitation
is expected at this time. However, a brief light snow/rain shower
cannot be ruled out at some point Tuesday/Wednesday.

The disturbance moves out of the region by the early morning hours
on Thursday. The second half of the week is looking quiet but
slightly chilly with some colder air following behind the
disturbance. Highs for the latter half of the week will be slightly
below normal with values ranging from the mid to upper 20s west of
the Divide and mid 30s east of the Divide. Lows will also be
slightly below normal with some chilly temperatures forecasted
starting Thursday. Models currently are showing lows near to below
zero west of the Divide and in the low teens to even single digits
east of the Divide. These slightly below normal temperatures look to
linger into the weekend. Overall conditions are looking to remain
rather dry heading into the end of November and start of December. A
few quick moving disturbances may move through the region for the
end of the week and into the weekend but there currently does not
look to be much moisture associated with them. So we will need to
wait and see if the weather pattern shifts but for now, things are
looking slightly chilly and mostly quiet to end November.

&&

.AVIATION /00Z TAFS THROUGH 00Z TUESDAY/...
Issued at 429 PM MST Sun Nov 24 2024

Light winds and skies improving overnight as the snow
pushes south and east of CPR and RKS. Low confidence on any fog
development up the Green River Basin for PNA/BPI, keeping it out
between 08-14Z. Otherwise, the only impact for Monday will be
increasing southwest winds at CPR with the lingering gradient seeing
gusts up to 30kts after 18Z through the end of the period. These
winds will decrease into the next TAF cycle towards sunset with no
other weather elements expected at this time.

Please see the Aviation Weather Center and/or CWSU ZDV and ZLC for
the latest information on smoke, icing, and turbulence forecasts.

&&

.RIW WATCHES/WARNINGS/ADVISORIES...
None.

&&

$$

DISCUSSION...Dziewaltowski
AVIATION...Lowe