Area Forecast Discussion
Issued by NWS Las Vegas, NV
Issued by NWS Las Vegas, NV
770 FXUS65 KVEF 181150 CCA AFDVEF Area Forecast Discussion National Weather Service Las Vegas NV 210 AM PDT Sat May 18 2024 .SYNOPSIS...The high pressure that brought the very warm temperatures Friday will shift east allowing for a downward trend in temperatures into early next week. Most areas remain dry aside from isolated showers over the Sierra and southern Great Basin over the next few days. Gusty winds develop on Sunday and Monday afternoon as well, especially in San Bernardino County. Dry, seasonably warm, and breezy conditions are anticipated later next week. && .SHORT TERM...Saturday through Monday. A cooling trend is expected over the next few days as a broad trough moves into the western states. Not only will this bring cooler temperatures, but increasing southwest winds, especially across western San Bernardino County, along with a chance of showers and thunderstorms to portions of the area. Due to the position of the exiting ridge and incoming trough we will see a convergence boundary develop from northern Inyo into Lincoln County. There will be plenty of mid-level moisture with PWs ranging from 0.50" - 0.75". Scattered showers and thunderstorms will be possible this afternoon across northern Inyo, Esmeralda, central Nye, and Lincoln Counties. Coverage is expected to be highest in the Sierra where orographics will be greatest leading to some showers/storms producing upwards of half an inch of rain. Gusty winds will also be a concern near any thunderstorms, especially in central Nevada. Expect to see this convergence boundary Sunday and Monday, but overall showers/thunderstorm coverage looks to be less and mainly confined to Lincoln County. Gusty southwest to west winds will develop Sunday and Monday mainly in a band from San Bernardino through Clark and into Mohave County. Most areas will see winds 15 to 25 mph with locally higher gusts. Areas across western San Bernardino County will see widespread wind of 20 to 30 mph with gusts to around 40 mph with the strongest winds occuring from late afternoon into late evening both Sunday and Monday. Some uncertainty remains in the duration of the winds, will continue to monitor trends to determine the need for headline issuance. Temperatures will cool into early next week with highs dropping below normal by Monday. .LONG TERM...Tuesday through Friday. Cluster H5 height anomalies which assimilates 100 model simulations shows some flavor of a longwave trough across the western states next week. Under this pattern, the region will be at least breezy at times with near to slightly below normal temperatures heading into the Memorial Day Weekend. && .AVIATION...For Harry Reid...Light south winds will continue through the morning then increase from the south-southwest and persist tonight. Gusts 20-25 knots likely 22Z-04Z. No operationally significant clouds. For the rest of southern Nevada, northwest Arizona and southeast California...Southwest winds will increase gusting 20-25 knots this afternoon across the region. Gusts around 30 knots will occur in the Barstow area. Scattered showers and isolated thunderstorms will develop 22Z-04Z from the Southern Sierra across Central Nevada to the panhandle of Lincoln County with clouds bases around 15 kft MSL. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && $$ SHORT TERM...Gorelow LONG TERM...Pierce AVIATION...Adair For more forecast information...see us on our webpage: https://weather.gov/lasvegas or follow us on Facebook and Twitter