Area Forecast Discussion
Issued by NWS Las Vegas, NV
Issued by NWS Las Vegas, NV
103 FXUS65 KVEF 242041 AFDVEF Area Forecast Discussion National Weather Service Las Vegas NV 140 PM PDT Tue Sep 24 2024 .SYNOPSIS...Temperatures will continue to increase each day through the end of the week as an upper-level ridge sets up over the region. This will lead to near record high temperatures and excessive heat for late September along the lower Colorado River Valley Thursday through Saturday. A weak low pressure system will move over Southern California and Nevada early next week resulting in a slight cooling trend. && .SHORT TERM...through Thursday. Persistent above normal temperatures and dry conditions are the main story for the foreseeable future although a Pacific Northwest trough moving inland and brushing northern Nevada will stir up some southerly breezes Wednesday afternoon across Inyo County and the southern Great Basin. The anomalously strong high centered over Arizona/New Mexico will begin expanding westward Wednesday leading to a gradual increase in temperatures with the forecast high of 107 at Needles within a degree of the record for Sep. 26. This leads to Major HeatRisk for late September for the Colorado River Valley zones and has prompted an Excessive Heat Warning Thursday-Saturday which matches warnings in nearby La Paz/Riverside counties. .LONG TERM...Friday through Tuesday. The area of high pressure will remain in place over the Desert Southwest and keep temperatures several degrees above normal through Saturday then a weak closed low near the California Coast is forecast to lift slowly inland across Southern Nevada Sunday into Monday and possibly Tuesday resulting in a slight cooling trend. The closed low will have little to no moisture with it, but may pull limited moisture from southwest Arizona up over northwest Arizona and near Southern Nevada. && .AVIATION...For Harry Reid...Light winds with northeast or east components during the afternoon and southwest components overnight will continue through Wednesday. VFR conditions with no significant clouds. For the rest of southern Nevada, northwest Arizona and southeast California...Diurnal winds generally 10 knots or less are expected at most regional TAF sites through Wednesday. The exception will be KBIH where afternoon south winds 12-20 knots will develop. VFR conditions will prevail at all sites with no significant cloud cover expected. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && $$ SHORT TERM/LONG TERM/AVIATION...Adair For more forecast information...see us on our webpage: https://weather.gov/lasvegas or follow us on Facebook and Twitter