Area Forecast Discussion
Issued by NWS Boise, ID
Issued by NWS Boise, ID
374 FXUS65 KBOI 090812 AFDBOI Area Forecast Discussion National Weather Service Boise ID 212 AM MDT Thu May 9 2024 .SHORT TERM...Today through Saturday night...An upper level ridge to our northwest combined with a trough to our southeast will give us NE flow aloft through Saturday. It will also give most of us mostly clear skies and warmer temperatures. And while they will also be warming up, the western Magic Valley and points south will see a chance of showers and weak thunderstorms this afternoon into the early evening. Friday will be dry with temperatures around 5 degrees above normal. Late Saturday, as the ridge axis weakens and moves overhead, we will have light NW winds aloft. Temperatures will rise to around 10 degrees above normal by Saturday. .LONG TERM...Sunday through Thursday...After our upper flow shifts to out of the NW late Saturday, a weak trough will move over the region late Sunday night or Monday. This should bring increased clouds, but most likely little to no precipitation. Ensembles indicate this will likely be followed by a return to NW flow aloft as a new ridge builds along the coast. The latest GFS is an outlier with its depiction of a trough moving into the area next Thursday. For now, this solution has been noted but not included in the forecast. Temps in the long term will be above normal, with Sunday the most likely to be the warmest at 10-15 degrees above normal. There is high chance (70-99%) of temps above 80 degrees from Ada County northwest through the lower Treasure Valley Saturday, then a near 100% chance Sunday. This high chance extends throughout the upper Treasure Valley and into the western Magic Valley Sunday. && .AVIATION...VFR with mostly clear skies. Sfc winds: W-N 5-10 kt, becoming NW through E and increasing to 5-15 kt by 18Z. Winds at 10k ft MSL: E-NE 10-15 kt north and 15-30 kt south. KBOI...VFR with clear skies. Sfc winds: NW 10-15 kt with gusts to 25 kt, diminishing to 10 kt or less by 04Z. Weekend Outlook...VFR with mostly clear skies. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...None. OR...None. && $$ www.weather.gov/Boise Interact with us via social media: www.facebook.com/NWSBoise www.twitter.com/NWSBoise SHORT TERM...SP LONG TERM....SP AVIATION.....SP