Area Forecast Discussion
Issued by NWS Boise, ID
Issued by NWS Boise, ID
860 FXUS65 KBOI 041546 AFDBOI Area Forecast Discussion National Weather Service Boise ID 946 AM MDT Wed Jun 4 2025 .DISCUSSION... The beginning of a warming trend today with less wind as the pressure gradient relaxes. Other than some afternoon cumulus over the higher terrain and a few high clouds, sunny conditions will prevail. Current forecast looks on track. && .AVIATION...VFR. Cumulus development in the mountains this afternoon with some virga or isolated showers, but mostly clear otherwise. Surface winds: variable less than 10 kt this morning, becoming N-NW 5-10 kt this afternoon. Winds aloft at 10kft MSL: NW-NE 10-20 kt. KBOI...VFR with mostly clear skies. Surface winds variable less than 8 kt this morning, becoming NW 5-10 kt this afternoon. && .PREV DISCUSSION... SHORT TERM...Today through Friday night...Our area will remain between an upper level trough over the northern US (including a a weak extension into the Great Basin) and an upper level ridge over the northern Pacific. This will keep our area in light northwest flow through the short term. Weak troughing overhead will allow for cumulus development and virga and/or isolated showers over the mountains each afternoon, while other areas remain mostly clear. Even in the mountains, precipitation chances will be less than 10%. Winds will be lighter than recent days with a light breeze each afternoon. The main upper level trough will gradually move east through Friday, allowing the Pacific ridge to expand inland. As a result, temperatures will rise by several degrees each day, reaching around 10 degrees above normal by Friday. LONG TERM...Saturday through Wednesday...The axis of the upper level ridge will move inland this weekend and remain overhead into Monday. As a result, temperatures will continue to climb, reaching 15-20 degrees above normal by Sunday and Monday, with lower valley high temperatures well into the 90s. On Monday, a weak trough is expected to move onto the coast and slowly progress inland Tuesday and Wednesday. This should bring a cooling trend, and there will be enough moisture for a slight (10-20%) chance of showers and thunderstorms, with the best chances in the higher terrain. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...None. OR...None. && $$ www.weather.gov/Boise Interact with us via social media: www.facebook.com/NWSBoise www.x.com/NWSBoise DISCUSSION...TL AVIATION.....JY SHORT TERM...ST LONG TERM....ST