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...Saturday through Wednesday
A very active and wet pattern will continue through the long term. Precipitation will briefly taper off on Saturday as a cold front stalls along the Nevada border and weakens. Temperatures will be 5-10 degrees cooler than Friday, but still slightly above normal. On Sunday and Monday, southwest flow aloft ahead of a deep trough off the coast will bring a plume of subtropical moisture into our area. The initial push of moisture is expected to arrive Sunday into Sunday night as a warm front lifts north through the area, bringing widespread precipitation. Snow levels will rise through the day, reaching 5500- 7500 feet MSL by Sunday night. Moderate to heavy precipitation totals are likely with this event, but significant snowfall will be limited to the peaks. Strong southwest flow aloft will continue on Monday, bringing additional moisture especially to the mountains. Snow levels are somewhat uncertain due to the trough moving slowly inland. On Tuesday and Wednesday, the flow aloft is expected to become more southerly as the trough deepens off the coast. This will keep our area mild with a 30-60% chance of rain and high elevation snow on Tuesday, increasing to a 50-80% chance on Wednesday. However, slight adjustments in the position of the trough could adjust temperatures higher or lower.
AVIATION
Mainly VFR overnight. A system will bring snow to the area starting Thursday morning, quickly changing to rain in the lower valleys, but remaining snow above 4000-5000 feet through Thursday afternoon. Mainly MVFR in rain, IFR/LIFR in snow. Mountains obscured in precipitation. Snow levels near valley floors Thursday morning, rising to 6-8kft MSL by Thursday evening. Surface winds: W- NW 10-30 kt with gusts 30-50 kt, becoming light and variable less than 15 kt by Thu/03Z. Winds aloft at 10kft: W-NW 30-50 kt.
KBOI...VFR tonight with mid to high clouds increasing. A rain/snow mix will develop around Thu/16-18Z, becoming all rain by around 18Z. Surface winds: W-NW 15-25 kt with gusts to 35 kt, gradually decreasing through early evening. Becoming SE 5-10 kt overnight.
BOI WATCHES/WARNINGS/ADVISORIES
ID...Wind Advisory until 5 PM MST this afternoon IDZ011-013-014-029. High Wind Warning until 5 PM MST this afternoon IDZ015-016-028-030. OR...None.
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