textproduct: Boise
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
LONG TERM...Sunday through Thursday
Drier conditions with gusty northwesterly winds will move into the area behind the exiting shortwave trough on Sunday afternoon. Dry weather will continue on Monday with winds slackening. A new upper level shortwave trough will move through the area on Tuesday spreading another round of precipitation across southwestern Idaho and southeastern Oregon. Snow levels on Tuesday are expected to be around 3000 feet which is a little lower than previously forecast and now support a mix of rain and snow in valley locations and light snow accumulations above about 3500 feet. The upper flow turns more northerly with available moisture and chances of precipitation decreasing on Wednesday and Thursday. Temperatures during the extend forecast period will be near normal for early December.
AVIATION
VFR conditions can be expected in most areas of southwestern Idaho and southeastern Oregon through early this evening. However, areas fog are likely to develop in valley locations again early Friday morning potentially impacting KBOI, KEUL, KONO, KMYL terminals with IFR/LIFR visibilities. Surface winds: light and variable though Friday Morning, becoming northwesterly at 10 to 15 kts on Friday afternoon. Winds aloft at 10kft MSL: NW 20-25 kt.
KBOI...VFR conditions expected through this evening. Fog is likely to redevelop after 06Z and bring IFR/LIFR visibilities to the terminal again through early Friday morning. A cold front will arrive around 12Z, shifting winds to a northwesterly direction and mixing fog out of the area. Winds will be light and variable overnight and then shift to northwest 10 to 15 kts on Friday behind the cold front.
Weekend outlook...A cold front will return precipitation late Saturday through early Sunday, with snowfall likely in the mountains and light rain and/or snow in the lower elevations. Snow levels around 4000 feet on Saturday will fall to around 3000 feet on Saturday night. Winds E-SE 5-10 kt Saturday becoming W-NW 5-10 kt Sunday, with afternoon gusts 15-20 kt
BOI WATCHES/WARNINGS/ADVISORIES
ID...None. OR...None.
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