Area Forecast Discussion
Issued by NWS Las Vegas, NV

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000 FXUS65 KVEF 251005 AFDVEF Area Forecast Discussion National Weather Service Las Vegas NV 205 AM PST Sat Feb 25 2017 .SYNOPSIS...A fast moving disturbance will dive across southern Nevada late today and early Sunday followed by a broad low pressure system Monday and Tuesday. This will make for breezy periods and the potential for a few brief mountain showers. Temperatures will be cool through Tuesday...followed by a warming trend commencing the middle of next week. && .SHORT TERM...through Monday night. Mostly clear skies dominate the region early this morning with another cool morning in store as temperatures across the deserts are already in the 30s and lower 40s, with teens and twenties in the higher elevations. More cool weather is on the way with the next reinforcing shot dropping down off the coast of Oregon at this hour and will continue to sink south off the coast of California before kicking inland and across our region tonight. Unfortunately for precipitation loves, majority of the precip will remain blocked by the Sierra and southern California mountains, and most areas won`t be seeing much more than increasing mid and high clouds Saturday afternoon through Sunday morning. A few sprinkles or light showers can`t be completely ruled out across the far western Mojave desert near Barstow and Twentynine Palms late Saturday night into Sunday morning as rain intensifies across coastal southern California, but chances are slight at best. Clouds will decrease through the day sunday as that impulse shifts east but cool and breezy conditions will persist before the next broader trough begins to push in from the north Monday. Once again, precipitation potential is quite limited thanks to the dry and continental trajectory of the storm system, but there is some indication of a plume of deeper subtropical moisture getting pulled into central Arizona Monday into Tuesday morning. While most of our forecast area won`t benefit much from this, areas south of I-40 in Northwest Arizona and southeast California will stand a little better chance of seeing measurable precipitation as this plume moves through. Elsewhere, cool and breezy but generally dry conditions are expected aside from a few light mountain snow showers. .LONG TERM...Wednesday through Friday. A dry northwest flow will hold over the region through Saturday allowing temperatures to warm back above normal. A weak area of low pressure forms south of the area late in the week but is forecast to have little moisture and no precipitation is expected. && .AVIATION...For McCarran...Light and variable winds favoring diurnal trends are expected through Saturday evening. Winds speeds will remain generally at or below 9 knots. Increasing high clouds can be expected during the afternoon and evening hours. For the rest of southern Nevada...northwest Arizona...and southeast California...Breezy conditions with wind speeds of 10-20 knots can be expected along a belt from KDAG to KIGM which will linger through Sunday morning. Elsewhere generally light winds are favored. A few showers are possible Saturday evening from KBIH eastward across the southern Great Basin, remaining north of KLAS. Outside the aforementioned area, just periods of high clouds are forecast. && .SPOTTER INFORMATION STATEMENT...Weather impacts are expected to be low over the weekend and early next week, however spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && $$ Short Term/Aviation...Outler Long Term...Salmen 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.