Area Forecast Discussion
Issued by NWS Riverton, WY

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FXUS65 KRIW 210517
AFDRIW

Area Forecast Discussion
National Weather Service Riverton WY
1117 PM MDT Wed Mar 20 2019

.SHORT TERM...This afternoon through Thursday

Quiet conditions continue this afternoon, as spring officially
starts (as of 3:58pm today). Clear and sunny skies will also
continue for much of the area into Thursday. Clouds will increase
over southwestern portions tonight into Thursday, along with
chances for isolated to widely scattered snow showers. With these
clouds, chances for fog to return to western Sweetwater County
tonight into Thursday morning are low. Temperatures tonight will
also be slightly warmer in these areas, but will be more toward
seasonal levels. Afternoon highs will remain seasonal for most
locations Thursday, with readings in the 60s possible in the
Bighorn Basin and lower elevations of Johnson County.

.LONG TERM...Thursday night through Wednesday

A low pressure center moves across UT and northern CO Thursday night
into Friday and will mainly impact areas of western and southern
WY, with rain and snow showers.  For the south and west,
precipitation amounts will be low as the system does not have a
lot of moisture with it. The temperatures are not very cold, so
some of the western valleys will likely see some rain or rain and
snow mixed. The models are still showing slight disagreement on
how much moisture will impact areas east of the Divide, so we are
keeping it dry for now.

Saturday and Sunday will see two additional weather systems
impacting the forecast area. The mountains and northern areas will
see showers on Saturday, with scattered rain showers over lower
elevations, and snow in the northwest mountains. The second one on
Sunday into Sunday night will impact the west initially and then
areas east of the divide Sunday afternoon and night. There may be
lingering snow showers Monday morning with the activity decreasing
and ending Monday afternoon. Monday night through Tuesday night look
dry over the region. Next Wednesday may see rain and snow showers
returning to the west. As for high temperatures, mild on Saturday,
then slightly colder Sunday and Monday. Warmer highs next Tuesday.

&&

.AVIATION...(For the 06Z TAFS through 06Z Thursday night)
Issued at 1112 PM MDT Wed Mar 20 2019

Increasing mid-high level cloudiness will continue for the
remainder of the night into Thursday. Some shower activity is
possible generally along and southwest of a KJAC-KLND-90NE KRKS
line mainly Thursday afternoon into Thursday night. However there
could be an initial band of showers that clip southwest Wyoming
Thursday morning. Brief MVFR conditions are possible with any
shower activity. Western mountains are expected to be obscured at
times Thursday night. Winds are expected to be mainly light.

&&

.FIRE WEATHER...

Dry conditions continue today. Wind will be light, up to moderate
in a few locations. Mixing and smoke dispersal will be generally
fair to poor. Isolated to widely scattered snow showers will be
possible late tonight into Thursday morning over southern and
southwestern portions. Western Wyoming will see a better chance
of showers on Friday.

&&

.RIW WATCHES/WARNINGS/ADVISORIES...NONE.

&&

$$

SHORT TERM...LaVoie
LONG TERM...McDonald/Swanson
AVIATION...Murrell
FIRE WEATHER...LaVoie


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