Area Forecast Discussion
Issued by NWS Riverton, WY

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FXUS65 KRIW 160550
AFDRIW

Area Forecast Discussion
National Weather Service Riverton WY
1150 PM MDT Sat Jul 15 2017

.SHORT TERM...(This evening through Tuesday)
Issued at 235 PM MDT Sat Jul 15 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 early next week with the polar jet across the Pacific
Northwest and Southern Canada.  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...(Tuesday night through Saturday)
Issued at 235 PM MDT Sat Jul 15 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 Tuesday night through Saturday with the polar jet across the
Pacific Northwest and Southern Canada.  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 Sunday night)
Issued at 1148 PM MDT Sat Jul 15 2017

VFR conditions will prevail through the period. A cold front will
push southeast across the region Sunday afternoon and evening.
Isolated to widely scattered showers and thunderstorms will
develop a few hours ahead of and along the cold front, primarily
from 19z Sunday until 02z Monday. A few strong thunderstorms are
possible vicinity and north of a KJAC-KBYG line that may produce
marginally severe hail and strong wind gusts 40-50 kts. Drier air
and clearing will push west to east across the area 03z-06z
Monday.

&&

.FIRE WEATHER...
Issued AT 235 PM MDT Sat Jul 15 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 early next week with the polar jet across the Pacific
Northwest and Southern Canada.  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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