Area Forecast Discussion
Issued by NWS Las Vegas, NV

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319 FXUS65 KVEF 182047 AFDVEF Area Forecast Discussion National Weather Service Las Vegas NV 145 PM PDT Sun Apr 18 2021 .SYNOPSIS...Dry weather with a warming trend will occur through Tuesday. A weak system will move through the region on Wednesday and Thursday bringing isolated light showers, a slight cooling trend and breezy winds. Temperatures will warm again heading into next weekend under a broad area of high pressure. && .SHORT TERM...Tonight through Wednesday. No significant weather impacts are expected this week across the region. Winds will decrease tonight into Monday morning as a low pressure system over Arizona slides into Northern Mexico. A shortwave trough dropping down over Idaho and Utah will produce northwest winds 15-25 mph primarily across central Nye and Lincoln counties Monday afternoon while the rest of the region should see speeds generally less than 15 mph along with high temperatures 6-8 degrees warmer than today. Temperatures will be similar Tuesday but southwest breezes will pick up ahead of a shortwave trough digging into northern California and Nevada. This system is forecast to slowly slide down over southern Nevada Wednesday. Limited moisture will accompany this trough and will lead to 20-30 percent chances for showers over the higher terrain of south central Nevada as well as the southern Sierra/White Mountains Wednesday afternoon. Temperatures will also begin pulling back...especially over Inyo County and near central Nevada where highs will drop 6-8 degrees. .LONG TERM...Thursday through Sunday. Additional energy diving into central and southern California Thursday which will reinforce the mean trough over our region and lead to temperatures continuing their downward trend. Slight chances for showers will be confined to the higher mountains in the afternoon then the trough is forecast to move away to the east Thursday night. Medium range ensembles are in good agreement that a ridge of high pressure will migrate over the western states Friday and Saturday leading to warm and dry conditions. Southwest breezes will likely increase across much of the region Sunday as the ridge axis moves over the Rockies and a deep trough over the Pacific approaches the West Coast. We will be keeping an eye on this system as model ensembles are beginning to show it could direct substantial moisture into California and the southwest states early next week. && .AVIATION...For McCarran...Northeast winds gusting to around 20KT will continue through the evening. Moderate confidence that gusts will drop off around 00Z as winds become more east and dissipate to below 10KT. Sometime between 03Z to 06Z, typical overnight southwest winds should return with light winds continuing through Monday morning. Lower confidence in the wind forecast for Monday afternoon as a southwest push of winds over 10KT are possible after 21Z but unsure if they will make it to the terminal. If they do not make it to the airport, east winds less than 8KT will persist through the afternoon. Clear skies will continue through the TAF period. For the rest of southern Nevada, northwest Arizona and southeast California...Breezy north to northeast winds will dissipate this evening. In he Colorado River Valley, elevated north winds will persist through the part of the night before they drop off by Monday morning. Elsewhere, light winds that follow typical wind patterns are expected and will continue through Monday morning. Winds will be lighter across the region Monday, with clear skies expected through the period. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && $$ SHORT TERM/LONG TERM...Adair AVIATION...Nickerson For more forecast information...see us on our webpage: or follow us on Facebook and Twitter is the U.S. government's official web portal to all federal, state and local government web resources and services.