Area Forecast Discussion
Issued by NWS Riverton, WY

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FXUS65 KRIW 231720

Area Forecast Discussion
National Weather Service Riverton WY
556 AM MDT Fri Mar 23 2018

.UPDATE...Winter weather highlights allowed to expire at 6 AM MDT
this morning. Snow to taper off and end this morning in the western
mountains. No other updates at this time.

.SHORT TERM...Today through Sunday night
Issued at 300 AM MDT Fri Mar 23 2018

The precip from the Pacific system will continue to lessen this
morning at the upper level support moves to the east. A weak inced
ridge will allow for one more day of warm weather with mostly dry
conditions. A few showers will linger over the mountains, especially
in the west. Saturday morning the next Pacific system will enter the
western states and precip will begin to increase in the western
mountains and valleys. This system will bring mostly sub-advisory
snow amounts west of the divide with the exception of the Tetons
which could see 7 to 9 inches. As the upper level trough continues
to push east, cooler temps and rain will begin to seep across the
area Sunday. Sunday night 700 mb temps are indicated to drop to the
area of -10C allowing for a change to snow in areas east of the

.LONG TERM...Monday through Friday
Issued at 300 AM MDT Fri Mar 23 2018

Snow in the central and eastern zones still seems on track Monday
with the snow tapering off during the afternoon hours. Scattered
areas of light snow in the rest of the area. Any lingering snow will
be ending Monday evening with partial clearing late Monday night.
Tuesday looks dry for the area. Moisture increases across the north
late Tues night ahead of another weather system and cold front that
moves through the region Wednesday. Will have a chance of rain and
snow in the north late Tue night. A chance of rain and snow in the
north Wednesday spreading into the central zones Wed afternoon and
evening. Still need to watch how this weather system evolves with
time. Dry most areas Thursday with only isolated snow showers in the
mountains. Next Friday scattered rain and snow will be moving back
into the north ahead of the next weather system. Dry conditions are
expected for the central south next Friday. As for high temperatures,
a cold day Monday, then a little milder Tue. Should be a little
cooler Wed, then milder next Thurs and Fri.


.AVIATION...18Z Issuance

West of the Continental Divide...KJAC, KBPI, KPNA, and KRKS

Expect VFR conditions through most of the period. A stray shower
will be possible at times through 03Z Saturday but these should
remain over the mountains. Steadier precipitation may return to the
far west Saturday morning, especially in vicinity of KJAC. However,
any lower ceilings and visibility should hold off until after 18Z

East of the Continental Divide...KCPR, KCOD, KRIW, KLND, and KWRL

Conditions will be VFR through 18Z/Fri. KCPR has the best chance for
brief MVFR this afternoon as a weak cold front sags south. Scattered
weak showers are possible this afternoon but these would be brief.
Any showers should end by 02Z Saturday.

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 Fri Mar 23 2018

Rain and snow will continue to linger in the western mountains and
valleys but other areas will be dry and warm until early tomorrow
morning. Lower elevations east of the divide will reach into the
lower 60s but winds and RH should remain favorable. Westerly winds
from Lincoln through Sweetwater Counties will be gusty through the
afternoon. The next frontal system is Saturday and will have a
slight chance for lightning but is expected to produce decent





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