Area Forecast Discussion
Issued by NWS Riverton, WY

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816
FXUS65 KRIW 170547
AFDRIW

Area Forecast Discussion
National Weather Service Riverton WY
1147 PM MDT Sun Jul 16 2017

.SHORT TERM...(This evening through Wednesday)
Issued at 254 PM MDT Sun Jul 16 2017

A large upper level high pressure ridge will remain across the Great
Basin and Desert Southwest into the Southern Plains will remain in
place into midweek with the polar jet across the Pacific Northwest
and Southern Canada, which will push a series of weak cold fronts
south across the area.  Little variation in temperatures and Relative
humidity is expected.  The air mass will be most unstable
in the afternoons and early evening hours with scattered showers
and isolated thunderstorms with strong win gusts.  Overall winds
will be light except for the thunderstorm outflow winds.

.LONG TERM...(Wednesday night through Sunday)
Issued at 254 PM MDT Sun Jul 16 2017

A large upper level high pressure ridge will remain across the Great
Basin and Desert Southwest into the Southern Plains will remain in
place Wednesday night through Sunday with the polar jet across the
Pacific Northwest and Southern Canada, which will push a series of
weak cold fronts south across the area.  Little variation in
temperatures and Relative humidity is expected.  The air mass will
be most unstable in the afternoons and early evening hours with
scattered showers and isolated thunderstorms with strong win gusts.
Overall winds will be light except for the thunderstorm outflow winds.

&&

.AVIATION...(For the 06Z TAFS through 06Z Monday night)
Issued at 1146 PM MDT Sun Jul 16 2017

VFR conditions will prevail through the forecast period. Isolated
to widely scattered showers, with possibly a thunderstorm or two,
will push across the southwest, vicinity KRKS-KBPI-KPNA 12z-18z
Monday. An upper level disturbance will bring a round of widely
scattered showers and thunderstorms across the area late Monday
afternoon through Monday evening, or primarily from 22z Mon-06z
Tue. A few storms could be marginally severe with wind gusts 40-50
knots and hail. The strongest storms are expected vicinity and
north of a KJAC-KWRL-KCPR line. Most of this activity will push
east of Interstate 25 06z-09z Tuesday.

&&

.FIRE WEATHER...
Issued AT 254 PM MDT Sun Jul 16 2017

A large upper level high pressure ridge will remain across the Great
Basin and Desert Southwest into the Southern Plains will remain in
place into midweek with the polar jet across the Pacific Northwest
and Southern Canada, which will push a series of weak cold fronts
south across the area.  Little variation in temperatures and Relative
humidity is expected.  The air mass will be most unstable
in the afternoons and early evening hours with scattered showers
and isolated thunderstorms with strong win gusts.  Overall winds
will be light except for the thunderstorm outflow winds.  Afternoon
mixing heights will be favorable with sufficient transport winds for
very good to excellent smoke dispersal.

&&

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

$$

SHORT TERM...Baker
LONG TERM...Baker
AVIATION...Meunier
FIRE WEATHER...Baker



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