Area Forecast Discussion
Issued by NWS Riverton, WY

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FXUS65 KRIW 171716
AFDRIW

Area Forecast Discussion
National Weather Service Riverton WY
1116 AM MDT Sat Jun 17 2017

.SHORT TERM...Saturday through Monday night

A cold front is currently moving through the area at this time. Most
of the the lightning and thunder has ended but some rain showers
will continue through the morning for many locations across the
northern two thirds of the area. A few showers will linger into the
morning hours as well. However, with ridging building across the
area the coverage of showers should decrease through the day with
all areas largely dry by mid afternoon. A thunderstorms or two may
linger in the early afternoon as well, but these should be few and
far between. However, clouds will linger across much of the area in
the morning with increased sunshine through the afternoon.
Temperatures should run about 5 to 10 degrees cooler than yesterday.
As for wind, there will still be a gusty wind across southern
portions and Johnson County but as a rule it should be less
windy.

Starting tonight, we will enter a quiet period of weather with
ridging and dry northwest flow dominating the weather for the most
part. Other than a gusty breeze in the west, tranquil weather is
expected for Father`s Day as well as Monday. Temperatures will also
be on an upward trend with 80s returning to the lower elevations by
Monday.

.LONG TERM...Tuesday through Saturday

Through the long term, the forecast area will be in a modest to
strong westerly flow between a subtropical ridge over the
Southern Rockies/S. Plains, and the main storm track over southern
Canada/N. Rockies/Plains. On Tuesday and Wednesday, there will be
enough instability for at least isolated mountain convection
pushing into the adjacent foothills. A weak cold front could push
into N. Wyoming Wednesday. The best shot for convection Tuesday
and Wednesday appears to be across the northwest/northern
mountains. Global models then show a more robust cold front
pushing across the area Wednesday night/Thursday time frame with
cooler, but with a drier airmass. The best cooling will be across
N. WY with the least over the southwest with models limiting any
chances of diurnal convection across the extreme north Thursday
through Saturday for now.

&&

.AVIATION...18Z Issuance

WEST OF THE DIVIDE...KBPI/KJAC/KPNA/KRKS ROUTES

VFR conditions to prevail through the forecast period as a drier
northwest flow overtakes the forecast area.

EAST OF THE DIVIDE...KCOD/KCPR/KLND/KRIW/KWRL ROUTES

A few isolated light showers are exiting central Wyoming this
morning with VFR conditions set to  prevail through the forecast
period as a drier northwest flow overtakes the forecast area.

&&

.FIRE WEATHER...

Expect a cooler day today following the passage of a cold front. A
few showers will linger in the morning, but coverage should
decrease through the day before ending by this evening. A gusty
wind will continue across south and western Wyoming as well as
portions of Johnson County. Relative humidity will remain above
critical levels. Mixing and smoke dispersal will be generally good
to very good. Dry weather will return Sunday and Monday along with
gradually warming temperatures.

&&

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

&&

$$

SHORT TERM...Hattings
LONG TERM...Murrell
AVIATION...Braun
FIRE WEATHER...Hattings



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