Area Forecast Discussion
Issued by NWS Riverton, WY

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FXUS65 KRIW 171723
AFDRIW

Area Forecast Discussion
National Weather Service Riverton WY
1123 AM MDT Tue Apr 17 2018

.SHORT TERM...(Today through Tuesday night)
Issued at 232 AM MDT Tue Apr 17 2018

A cold front is pushing through the area this morning shifting
wind flow to the northwest. 700mb temps look to be cold enough to
keep most precip snow but some areas will see a rain/snow mix.
this system is quick moving and should not create much in the way
of accumulation. However, the Cody Foothills could be an exception
with upslope winds around the Meeteetse Rim bringing slightly
higher amounts and winds creating low visibilities. The system
will exit the area around noon and leave a few lingering showers
which should slowly tapper off around midnight. Wednesday will see
the return of ridging and dry weather with a warming trend.
Thursday will be much the same except a cut-off low to the south
will bring increased winds from Sublet to Sweetwater Counties and
very isolated showers late in the evening to the southern areas.

.LONG TERM...(Wednesday through Monday)
Issued at 232 AM MDT Tue Apr 17 2018

An upper low is expected to push east across the Four Corners
region Friday, then into the southern High Plains Saturday. The
forecast area is on the northern fringe of this system, with most
of the precipitation remaining southeast of the forecast area.

A warming trend with mainly dry conditions is expected over the
weekend. Cannot rule out an isolated mountain shower over the
north. Temperatures look to be 5 to 10 degrees above average.

Both the ECMWF and GFS are showing a weak wave pulling across the
northern Rockies Monday and/or Tuesday which could give the area
some valley rain/high mountain snow.

&&

.AVIATION...(For the 18Z TAFS through 18Z Wednesday afternoon)
Issued at 1123 AM MDT Tue Apr 17 2018

West of the Continental Divide...KJAC, KBPI, KPNA, and KRKS

Isolated to scattered snow showers will continue this afternoon
with mountain obscurations. MVFR to brief IFR conditions will
occur at times. A gusty west to northwest wind will be common at
the terminal sites, subsiding after 01Z. VFR conditions will
prevail after 00Z at the terminal sites, with clearing skies after
06Z Wednesday.


East of the Continental Divide...KCPR, KCOD, KRIW, KLND, and KWRL

A band of snow continues over central WY that will progress
eastward through the afternoon. This area of snow will impact the
KBYG to KCPR area through 00Z. Lingering snow showers will occur
until 03Z Wed. MVFR to IFR conditions will occur during the snow
showers, before returning to VFR conditions once the area of snow
moves out. Mountains will be frequently obscured at times. VFR
conditions will prevail at the terminals after 02Z Wed, with
clearing skies after 06Z Wednesday.

&&

.FIRE WEATHER...
Issued AT 232 AM MDT Tue Apr 17 2018

A cold front is pushing though the area this morning which will
bring cooler temperatures and higher RH. South winds will shift to
the west today with wind speeds as high as 30 to 40 mph along with
gusts to 50 mph in zone 279. Accumulating snowfall is likely
across much of Western and Central Wyoming today through this
afternoon. Wednesday will see the return of dryer weather with a
warming trend through Thursday.

&&

.RIW WATCHES/WARNINGS/ADVISORIES...
Winter Weather Advisory until noon MDT today for WYZ003.

&&

$$

SHORT TERM...Hulme
LONG TERM...Murrell
AVIATION...LaVoie
FIRE WEATHER...Hulme



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