Marine Weather and Tide Forecast for Garden City, ID
December 7, 2024 1:54 PM MST (20:54 UTC) Change Location
 | Sunrise 8:03 AM Sunset 5:09 PM Moonrise 12:56 PM Moonset 11:57 PM |
NEW! Add second zone forecast
FXUS65 KBOI 071602 AFDBOI
Area Forecast Discussion National Weather Service Boise ID 902 AM MST Sat Dec 7 2024
DISCUSSION
Visibility has generally improved in the Upper Treasure Valley and the Dense Fog Advisory has been cancelled there. The advisory will continue until 11 AM MST in the Lower Treasure Valley and Upper Weiser River area. Approaching cold front will begin pcpn in western Baker and Harney Counties around sunset, in western ID 6 PM MST north to 8 PM MST south, the Boise metro around 9 PM, then Twin Falls and Jerome around 1 AM. Frontal pcpn will last about 4 hours in the north and 2 hours in the south. Pcpn should be entirely snow in the northern mountains with 1-3 inches accumulation, but mixed snow, freezing rain, and rain is expected in the valleys. Freezing rain, even light amounts, is always hazardous, and we have a Winter Weather Advisory in effect this evening in Malheur County (mainly northern part)
and the Lower Treasure Valley in Idaho. We are considering adding the Upper Treasure Valley as hi-res models also show light freezing rain there. Models don't fully clear out the stratus in the Treasure Valley tonight but they do end the fog and air stagnation, and at least some sunshine is expected Sunday. Current forecast looks good there.
AVIATION
IFR/LIFR and local VLIFR in fog and low stratus will persist today across lower elevations, mostly in the Snake Plain west of KTWF/KJER and mountain valleys. Low stratus decreasing east of KBOI this afternoon. Wintry mix of rain, snow, and freezing rain tonight along a cold front. Mountains becoming obscured this evening. Surface winds: S-SE 5-15 kt, except variable less than 5 kt in sheltered lower valleys including near KEUL/KONO. Winds aloft at 10kft MSL: W-SW 20-40 kt.
KBOI...LIFR/IFR with fog and low stratus. Low potential for stratus to decrease this afternoon as light SE winds develop. A light wintry mix of snow and freezing rain is expected this evening. Winds light and variable this morning, becoming SE 3-6 kt this afternoon.
Sunday Outlook...Conditions likely improve to VFR in valleys by Sunday afternoon fog/stratus dissipates. Mountains will keep local IFR in snow showers with mountain obscuration. Surface winds W-NW 5-15 kt, with gusts to 25 kt near KTWF/KJER.
AIR STAGNATION
The Air Stagnation Advisory will continue until 5 PM MST today. A surface cold front will begin to mix the air at lower levels this evening, and a cold upper trough Sunday will produce deeper mixing and ventilation, ending the stagnation.
PREV DISCUSSION
SHORT TERM
Today through Monday night
An inversion remains in place through Saturday evening before a cold front moves through the area. Fog and stratus will remain in the Snake Basin into Saturday afternoon up until the cold front arrives. With cold air entrenched in the Treasure Valley, surface temperatures in the Treasure Valley are expected to be at or below freezing as precipitation moves in. However, temperatures aloft will be near or slightly above freezing, resulting in a wintry mix of snow and freezing rain possible. The highest confidence in freezing rain potential (in addition to light snow potential) is in the Lower Treasure Valley and northern portions of Malheur County. The winter weather advisory remains in effect for these areas on Saturday night. In the mountains, snow amounts of 1-3 inches are expected Saturday night. As the cold front moves through, the inversion should scour out, cleaning the air. Snow showers continue over the mountains into Monday, with light accumulations. Low clouds will linger after the system moves through with areas of fog redeveloping on Monday morning. Dry and cool conditions on Monday with areas of fog.
LONG TERM
Tuesday through Saturday
Northerly flow weakens as an upper ridge moves overhead Tuesday and Wednesday. Valley fog is possible Tuesday morning with max RHs near saturation, but drying on Wednesday doesn't favor redevelopment the following morning. The ridge will be short-lived as a series of storms is expected to track through the area beginning Thursday. There is some model disagreement on the timing and strength of these systems, but the overall trend favors cool and active weather. The ECMWF Extreme Forecast Index and shift of tails remain very low during the beginning of this pretty significant active pattern, suggesting storms are unlikely to be unusually extreme favoring more typical winter weather.
Valleys would see rain and snow with less than an inch accumulation while mountains see light to moderate snowfall.
Temperatures near normal.
BOI WATCHES/WARNINGS/ADVISORIES
ID...Air Stagnation Advisory until 5 PM MST this afternoon IDZ011>014-016-028-033.
Dense Fog Advisory until 11 AM MST this morning IDZ012-033.
Winter Weather Advisory from 5 PM this afternoon to 5 AM MST Sunday IDZ012.
OR...Air Stagnation Advisory until 5 PM MST /4 PM PST/ this afternoon ORZ061>064.
Dense Fog Advisory until 11 AM MST this morning ORZ064.
Winter Weather Advisory from 5 PM MST /4 PM PST/ this afternoon to 5 AM MST /4 AM PST/ Sunday ORZ063-064.
Area Forecast Discussion National Weather Service Boise ID 902 AM MST Sat Dec 7 2024
DISCUSSION
Visibility has generally improved in the Upper Treasure Valley and the Dense Fog Advisory has been cancelled there. The advisory will continue until 11 AM MST in the Lower Treasure Valley and Upper Weiser River area. Approaching cold front will begin pcpn in western Baker and Harney Counties around sunset, in western ID 6 PM MST north to 8 PM MST south, the Boise metro around 9 PM, then Twin Falls and Jerome around 1 AM. Frontal pcpn will last about 4 hours in the north and 2 hours in the south. Pcpn should be entirely snow in the northern mountains with 1-3 inches accumulation, but mixed snow, freezing rain, and rain is expected in the valleys. Freezing rain, even light amounts, is always hazardous, and we have a Winter Weather Advisory in effect this evening in Malheur County (mainly northern part)
and the Lower Treasure Valley in Idaho. We are considering adding the Upper Treasure Valley as hi-res models also show light freezing rain there. Models don't fully clear out the stratus in the Treasure Valley tonight but they do end the fog and air stagnation, and at least some sunshine is expected Sunday. Current forecast looks good there.
AVIATION
IFR/LIFR and local VLIFR in fog and low stratus will persist today across lower elevations, mostly in the Snake Plain west of KTWF/KJER and mountain valleys. Low stratus decreasing east of KBOI this afternoon. Wintry mix of rain, snow, and freezing rain tonight along a cold front. Mountains becoming obscured this evening. Surface winds: S-SE 5-15 kt, except variable less than 5 kt in sheltered lower valleys including near KEUL/KONO. Winds aloft at 10kft MSL: W-SW 20-40 kt.
KBOI...LIFR/IFR with fog and low stratus. Low potential for stratus to decrease this afternoon as light SE winds develop. A light wintry mix of snow and freezing rain is expected this evening. Winds light and variable this morning, becoming SE 3-6 kt this afternoon.
Sunday Outlook...Conditions likely improve to VFR in valleys by Sunday afternoon fog/stratus dissipates. Mountains will keep local IFR in snow showers with mountain obscuration. Surface winds W-NW 5-15 kt, with gusts to 25 kt near KTWF/KJER.
AIR STAGNATION
The Air Stagnation Advisory will continue until 5 PM MST today. A surface cold front will begin to mix the air at lower levels this evening, and a cold upper trough Sunday will produce deeper mixing and ventilation, ending the stagnation.
PREV DISCUSSION
SHORT TERM
Today through Monday night
An inversion remains in place through Saturday evening before a cold front moves through the area. Fog and stratus will remain in the Snake Basin into Saturday afternoon up until the cold front arrives. With cold air entrenched in the Treasure Valley, surface temperatures in the Treasure Valley are expected to be at or below freezing as precipitation moves in. However, temperatures aloft will be near or slightly above freezing, resulting in a wintry mix of snow and freezing rain possible. The highest confidence in freezing rain potential (in addition to light snow potential) is in the Lower Treasure Valley and northern portions of Malheur County. The winter weather advisory remains in effect for these areas on Saturday night. In the mountains, snow amounts of 1-3 inches are expected Saturday night. As the cold front moves through, the inversion should scour out, cleaning the air. Snow showers continue over the mountains into Monday, with light accumulations. Low clouds will linger after the system moves through with areas of fog redeveloping on Monday morning. Dry and cool conditions on Monday with areas of fog.
LONG TERM
Tuesday through Saturday
Northerly flow weakens as an upper ridge moves overhead Tuesday and Wednesday. Valley fog is possible Tuesday morning with max RHs near saturation, but drying on Wednesday doesn't favor redevelopment the following morning. The ridge will be short-lived as a series of storms is expected to track through the area beginning Thursday. There is some model disagreement on the timing and strength of these systems, but the overall trend favors cool and active weather. The ECMWF Extreme Forecast Index and shift of tails remain very low during the beginning of this pretty significant active pattern, suggesting storms are unlikely to be unusually extreme favoring more typical winter weather.
Valleys would see rain and snow with less than an inch accumulation while mountains see light to moderate snowfall.
Temperatures near normal.
BOI WATCHES/WARNINGS/ADVISORIES
ID...Air Stagnation Advisory until 5 PM MST this afternoon IDZ011>014-016-028-033.
Dense Fog Advisory until 11 AM MST this morning IDZ012-033.
Winter Weather Advisory from 5 PM this afternoon to 5 AM MST Sunday IDZ012.
OR...Air Stagnation Advisory until 5 PM MST /4 PM PST/ this afternoon ORZ061>064.
Dense Fog Advisory until 11 AM MST this morning ORZ064.
Winter Weather Advisory from 5 PM MST /4 PM PST/ this afternoon to 5 AM MST /4 AM PST/ Sunday ORZ063-064.
Link to 1 hour of 5 minute data for KBOI
Terminal Aerodrome Forecast (TAF) for KBOI
Wind History Graph: BOI
(wind in knots)
GEOS Local Image of Pacific Northwest
Edit Hide
Boise, ID,
NOTICE: Some pages have affiliate links to Amazon. As an Amazon Associate, I earn from qualifying purchases. Please read website Cookie, Privacy, and Disclamers by clicking HERE. To contact me click HERE. For my YouTube page click HERE