Area Forecast Discussion
Issued by NWS Riverton, WY

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FXUS65 KRIW 270921

Area Forecast Discussion
National Weather Service Riverton WY
321 AM MDT Tue Oct 27 2020

.SHORT TERM...(Today through Wednesday Night)
Issued at 300 AM MDT Tue Oct 27 2020

Partly cloudy to mostly clear over the area early this morning
with passing high clouds. Some warm advection clouds in the far
west are lingering and will gradually decrease after sunrise.
Breezy to windy in Natrona county as a result of lee side
pressure falls with the warm advection pattern. Parts of NW WY are
seeing the wind too, from Dubois, north through the Absaroka
mountains. Temperatures vary widely over the area at 3 AM, from
around zero through the single digits in the cold snow covered
valleys to the 20s in the foothills and far west where the cloud
cover is keeping temps up.

Forecast issue today and tomorrow will be the temperatures. Dry
weather will occur through Wednesday night. Some breezy to windy
areas will occur, parts of NW WY including the Dubois area, and
the wind corridor of southern and central WY. Warm advection to
continue today and tomorrow as temps aloft warm up. Snow cover
continues to impact the valley and basin highs and lows. Thus the
colder highs will continue to be found in these locations. The
foothills and wind areas will see the milder temps today and

High temperatures today will be in the mid 30s to mid 40s with
upper 20s to lower 30s in the colder valleys where no mixing will
occur. Lows tonight will be in the 20s to lower 30s with mostly
teens in the far west valleys and parts of the south. Central
basins with snow cover will see lows of 10 to 18 above. Wednesday
highs will be in the 40s to lower 50s with the colder snow covered
areas around 40 for a high. Lows Wednesday night are to be in the
20s to lower 30s with teens in the colder valleys.

.LONG TERM...(Thursday through Monday)
Issued at 300 AM MDT Tue Oct 27 2020

The weather pattern continues quite benign through the weekend.
The ridge will continue to dominate the region for a slow warming
trend. Mostly clear skies and dry conditions will prevail. Basin
areas may still be slower to warm up Thursday as the snow cover
and trapped cold air could hamper warming. There are still
indication on the models of a weak trough moving across the region
for the Friday/Saturday time frame, however there will be little
or no impact across the area, other than some increased cloud


.AVIATION...For the 12Z TAFS through 12Z Wednesday
Issued AT 300 AM MDT Tue Oct 27 2020

Expect VFR conditions with mainly SKC and generally light winds
through the TAF period. BKN-OVC clouds around 5000 feet over far
western portions may linger over KJAC and the far west through
16Z. Gusty southwest winds will continue at KCPR through the TAF
period. Gusty winds will also develop at KPNA after 18Z until 01Z.

Please see the Aviation Weather Center and/or CWSU ZDV and ZLC
for the latest information on icing and turbulence forecasts.


Issued AT 300 AM MDT Tue Oct 27 2020

Dry weather will occur today through Thursday. Breezy to windy
conditions will occur in the wind corridor of southern and central
Wyoming today and Wednesday. Breezy to windy weather will also
occur in fire zone 286 south to the Dubois area today through
Wednesday. Temperatures will be milder today and this trend will
continue for Wednesday and Thursday. Smoke dispersal will remain
poor to fair today and Wednesday in the basins and valleys due to
light wind and the inversions. Where the wind blows, smoke dispersal
will be fair to good this afternoon and again Wednesday afternoon.





LONG TERM...Swanson
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