Sunrise 6:41 AM   Sunset 8:43 PM Moonrise 11:13 PM   Moonset 6:51 AM

  Print   HELP   Reset   Save   Recall

FXUS65 KBOI 262047 AFDBOI

Area Forecast Discussion National Weather Service Boise ID 247 PM MDT Fri Apr 26 2024

SHORT TERM
Tonight through Sunday night...Scattered rain showers have developed this afternoon in Baker and Malheur Counties in Oregon and in the Owyhee Mountains in Idaho as an upper trough comes in from the northwest. Showers will develop over higher terrain in the rest of our CWA later today and marginal instability will support isolated thunderstorms (10-20 percent coverage) through sunset. Gusty northwest winds will blow through the night and Saturday, decreasing only slightly between midnight and dawn. The windiest area will be the Snake Basin from Mountain Home eastward where speeds 20 to 30 mph and gusts 35 to 40 mph will be found. Rain and snow showers will continue in central and south- central Idaho Saturday and Saturday night (snow level 6000 feet MSL), ending Sunday as the upper trough moves into the central and southern Rockies. Drying Sunday night under a weak upper ridge ahead of the next deep trough approaching from the Gulf of Alaska.

LONG TERM
Monday through Friday...The 12Z runs of the deterministic models have come into much better agreement through Thursday night. They depict an upper trough moving by to our north Monday and a second one Tuesday into Tuesday night.
Together, these will keep a chance (generally 15-40%) of showers, mainly in the north, through Tuesday night. Isolated thunderstorms are also in the forecast in the north Mon/Tue aft/eve. Temps will be around 5 degrees below normal. We'll see relatively dry northerly flow aloft Wed night into Thu, gently backing to NW late Thu and continuing into Friday. This will bring just a slight chance (10-20%) of showers to the northern higher terrain. Temps in the NBM seemed to be influenced too much by time-lagged members, and were adjusted cooler to be more in line with newest GFS and EC MOS guidance.

AVIATION
Generally VFR. Isolated thunderstorms and scattered to numerous showers in SE OR and the higher terrain of southwest Id this aft/eve. Snow levels 6000-7500 ft MSL. Mountains obscured during showers. Surface winds: W to NW 10-20 kt with gusts to 20-30 kt this aft/eve, decreasing aft 06Z. Winds aloft at 10kft MSL: N to NW 10-20 kt.

KBOI...VFR with scattered mid and high clouds, with only a 10% chance of a shower this aft/eve. Surface winds: NW 5-15 kt, increasing to 10-20 kt with gusts around 25 kt, decreasing after 06Z.

Weekend Outlook...Isolated to scattered showers Saturday over the mountains, with mostly dry conditions and decreasing clouds elsewhere. Mostly dry Sunday. Mountains obscured during showers. Snow levels: 4000-6000 ft MSL Saturday, 6000-7000 ft MSL Sunday. Surface winds generally W-NW 10-25 kt. Gusts 30-40 kt from KMUO to KJER/KTWF Saturday, then 20-30 kt Sunday.

BOI WATCHES/WARNINGS/ADVISORIES
ID...None.
OR...None.

Full Color Weather Map

Link to Loop


Other links: GEOS-West     Contential US     Full GOES-East

Boise, ID,