Area Forecast Discussion
Issued by NWS Riverton, WY

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FXUS65 KRIW 282034
AFDRIW

Area Forecast Discussion
National Weather Service Riverton WY
234 PM MDT Wed Oct 28 2020

.SHORT TERM...(This evening through Thursday night)
Issued at 214 PM MDT Wed Oct 28 2020

H5 ridge continues to stretch across the southwest today, keeping
weather systems deflected well to the north. H7 temperatures
continue to rise, bringing good sfc temperature recovery today,
with lower elevations in the 40s and low 50s. Recovery continues
on Thursday, with most temperatures across the region returning to
normals in the 50s. High clouds will likely continue, with minimal
to no lower clouds expected. Will be keeping an eye on Jackson
Hole overnight, as light fog may start to develop with the melting
of the remaining snowpack trapping moisture under the inversion.
Fog there has been minimal so far the past couple days, so not
expecting much if any fog tonight.

.LONG TERM...(Friday through Wednesday)
Issued at 214 PM MDT Wed Oct 28 2020

For the first part of the forecast period, a trough is expected
to push through Friday into Saturday. No precipitation is
expected, but there may be an increase in clouds. Temperatures
should be several degrees cooler on Saturday with a gusty
northwest wind, but with forecasted highs above the climatological
norms on Friday, this should just bring temperatures back to near
normal. For the remainder of the long-term, expect temperatures
to climb again back to above normal. The aforementioned trough is
forecasted to deepen as it moves over the Great Lakes Region
allowing for a building ridge over the the western CONUS. As this
ridge approaches WY, it looks to dampen by the end of the period.
Models want to pick up a little perturbation in the flow for
Tuesday, but nothing in the way of precipitation. High
temperatures by the end of the period are expected to be running
around 10-15 degrees above normal.

&&

.AVIATION...(For the 18Z TAFS through 18Z Thursday afternoon)
Issued at 1140 AM MDT Wed Oct 28 2020

VFR conditions under FEW-SCT high ceilings for the afternoon
through tomorrow, with areas of clearing towards the southern
portion of the state. Winds will be generally light, 12 kts or
less. A few TAF sites will have gusts 20 to 30 kts, including at
KPNA as we speak, KCPR and KCOD after 29/06Z. Chance of VCFG at
KJAC under light winds and a decreasing dewpoint depression in the
early morning before daybreak.

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


&&

.FIRE WEATHER...
Issued AT 214 PM MDT Wed Oct 28 2020

Dry weather will occur today through Friday. Breezy to windy areas
in northwest Wyoming from Dubois north through the Absaroka
mountains today through Friday. Breezy to windy areas in fire
zones 289 and 280 today through Friday. A gradual warming of high
temperatures will occur through Friday. Smoke dispersal will be
poor to fair today and again Thursday. Smoke dispersal Friday
looks to be fair to good with a few poor areas in the basins where
the lack of mixing.

&&

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

$$

SHORT TERM...Straub
LONG TERM...Clayton
AVIATION...CYS Backup Meteorologist
FIRE WEATHER...Straub



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