Area Forecast Discussion
Issued by NWS Cheyenne, WY

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000 FXUS65 KCYS 170441 AFDCYS Area Forecast Discussion National Weather Service Cheyenne WY 1040 PM MDT Fri Mar 16 2018 .SHORT TERM...(This afternoon through Sunday) Issued at 145 PM MDT Fri Mar 16 2018 The storm system, which brought heavy snow to portions of the area, is coming to an end with light to moderate snowfall still being observed across mainly the northern Nebraska panhandle early this afternoon. Most of the snow has ended across southeast Wyoming, so let those Winter Weather Advisories expire on time. Will likely let the remain warnings/advisories for the northern panhandle and Niobrara county expire at 300 pm. Temperatures have struggled to moderate this afternoon, so lowered temperatures tonight by a few degrees, especially in the areas with the most snow cover and where clear skies are expected. Strong wind gusts are currently being observed across the Elk Mountain and Arlington areas with gusts generally between 50 to 55 MPH. Expect these winds to peak shortly and then gradually diminish through the rest of the afternoon and tonight, so will not issue any High Wind Headlines at this time. Patchy fog is expected across the Laramie Valley and across the eastern plains of far eastern Wyoming and western nebraska due to a saturated BL and good radiational cooling tonight. For this weekend, warmer temperatures are forecast on Saturday as upper level flow becomes more southwesterly. With mostly sunny skies, expect temperatures in the upper 40`s to upper 50`s. Areas with a solid snowpack may remain in the low to mid 40`s though. Models show the next Pacific storm system moving across the Great Basin region Saturday afternoon. This storm is trending further south compared to the yesterdays/this mornings storm, but will still need to be watched since accumulating snowfall looks likely along portions of the I-80 corridor and the western Nebraska panhandle. With upslope flow, frontogenesis, and some llvl convergence, Periods of light to moderate snow are possible Sunday afternoon through Sunday night. Continued to increase POP, but do not expect major impacts at this time due to snow and/or wind. .LONG TERM...(Sunday night through Thursday) Issued at 322 AM MDT Fri Mar 16 2018 Looks like there should be some fairly widespread snow across much of the CWA Sunday night as the upper low moves east from Colorado across the OK/KS border area. Pcpn ending during the day Monday but a chilly day with a cool sfc high settling over the region. Mainly dry and warming up in the Tuesday through Thursday time period as upper ridging amplifies and moves across the region. A few showers possible out west by late Thursday ahead of the next upper trough that will move onshore along the Pacific coast. && .AVIATION...
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(For the 06Z TAFS through 06Z Saturday evening) Issued at 1040 PM MDT Fri Mar 16 2018 MVFR CIGS will persist at KCDR through 09Z. MVFR VIS in late night and early morning fog will develop with moist boundary layer and light winds. Preferred areas include the Laramie Valley (KLAR), Platte River Valley (KBFF), KCDR and KAIA. The fog should lift by 16Z. KRWL, KCYS, KSNY and KCDR can expect VFR through the TAF period. Light winds overnight will shift to southerly after 15Z, and become breezy at times with gusts 25-35 kt west of the Laramie Range. Mid and high clouds will increase from west to east after 00Z.
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&& .FIRE WEATHER... Issued at 109 PM MDT Fri Mar 16 2018 No Fire Weather concerns through the weekend and into next week with high relatively humidities and another chance for rain and snow Sunday and Sunday night. && .CYS WATCHES/WARNINGS/ADVISORIES... WY...None. NE...None. && $$ SHORT TERM...TJT LONG TERM...RE AVIATION...MAJ FIRE WEATHER...TJT is the U.S. government's official web portal to all federal, state and local government web resources and services.