Updated: 7:00 AM PST on December 19, 2014
Overcast with rain, then a chance of rain in the afternoon. Fog early. High of 41F. Winds from the South at 5 to 10 mph. Chance of rain 100%.
Overcast with a chance of rain, then a chance of snow and a chance of rain after midnight. Low of 32F. Winds from the South at 5 to 10 mph. Chance of precipitation 70% .
Overcast with a chance of snow and rain, then rain in the afternoon. High of 39F with a windchill as low as 27F. Winds from the SSE at 5 to 15 mph. Chance of precipitation 100% .
Overcast with rain. Low of 37F. Breezy. Winds from the SSW at 15 to 20 mph. Chance of rain 100% with rainfall amounts near 0.4 in. possible.
Overcast with rain. Fog early. High of 46F. Breezy. Winds from the WSW at 10 to 20 mph. Chance of rain 70%.
Overcast with a chance of rain. Low of 37F. Winds less than 5 mph. Chance of rain 40%.
Overcast in the morning, then mostly cloudy. High of 45F. Winds less than 5 mph.
Partly cloudy with a chance of rain after midnight. Low of 37F. Winds less than 5 mph. Chance of rain 20%.
Overcast with a chance of rain. High of 43F. Winds from the South at 5 to 10 mph. Chance of rain 70%.
Mostly cloudy with a chance of rain. Low of 34F. Winds from the SW at 5 to 10 mph. Chance of rain 50%.
Mostly cloudy. Fog early. High of 41F. Winds less than 5 mph.
Mostly cloudy. Low of 27F. Winds less than 5 mph.
Partly cloudy. High of 36F. Winds less than 5 mph.
Clear. Low of 23F. Winds less than 5 mph.
Partly cloudy. High of 27F. Winds less than 5 mph.
Partly cloudy. Low of 19F. Winds less than 5 mph.
Mostly cloudy with a chance of snow. High of 30F. Winds less than 5 mph. Chance of snow 20%.
Mostly cloudy with a chance of snow. Fog overnight. Low of 18F. Winds less than 5 mph. Chance of snow 40% with accumulations up to 2 in. possible.
Overcast with a chance of snow. Fog early. High of 30F. Winds less than 5 mph. Chance of snow 40% with accumulations up to 1 in. possible.
Overcast with a chance of snow. Fog overnight. Low of 18F. Winds less than 5 mph. Chance of snow 40% with accumulations up to 1 in. possible.
Partly cloudy with a chance of snow. Fog early. High of 30F. Winds less than 5 mph. Chance of snow 40%.
Clear. Low of 18F. Winds less than 5 mph.
Personal Weather Stations [Add your weather station!]
Location: ITD Wallace Viaduct ID US, Wallace, ID
Updated: 8:30 AM PST
|Temperature: 37 °F||Dew Point: 36 °F||Humidity: 99%||Wind: NE at 1 mph||Pressure: -||Hourly Precipitation: 0.00 in||Windchill: 37 °F||Graphs|
Location: RAWS NUCKOLS ID US, Silverton, ID
Updated: 8:08 AM PST
|Temperature: 35 °F||Dew Point: 34 °F||Humidity: 96%||Wind: NE at 3 mph||Pressure: -||Hourly Precipitation: 0.03 in||Windchill: 35 °F||Graphs|
Location: ITD Lookout Pass ID US, Mullan, ID
Updated: 8:30 AM PST
|Temperature: 33 °F||Dew Point: 32 °F||Humidity: 96%||Wind: NE at 1 mph||Pressure: -||Hourly Precipitation: 0.02 in||Windchill: 33 °F||Graphs|
Location: Little Beaver Creek, Trout Creek, MT
Updated: 10:25 AM MST
|Temperature: 33.0 °F||Dew Point: 31 °F||Humidity: 92%||Wind: Calm||Pressure: 29.95 in||Hourly Precipitation: 0.00 in||Windchill: 33 °F||Graphs|
Location: RAWS FISH HOOK ID US, Avery, ID
Updated: 8:08 AM PST
|Temperature: 34 °F||Dew Point: 34 °F||Humidity: 98%||Wind: South at 6 mph||Pressure: -||Hourly Precipitation: 0.01 in||Windchill: 29 °F||Graphs|
Location: Diamond Street, Kellogg, ID
Updated: 9:25 AM PST
|Temperature: 37.9 °F||Dew Point: 37 °F||Humidity: 97%||Wind: Calm||Pressure: 29.97 in||Hourly Precipitation: 0.04 in||Windchill: 38 °F||Graphs|
MSN Maps of:
|Temp:||Dew Point:||Humidity||Wind||Pressure||Hr Precip||-|
Area forecast discussion National Weather Service Spokane Washington 414 am PST Friday Dec 19 2014 Synopsis... a more active weather pattern will continue into early next week. Another weather system will bring snow to the mountains with mainly rain for the valleys tonight into Friday. A stronger storm Saturday into Sunday will bring mainly rain for the valleys...as well as mountain snow with rising snow levels. Temperatures are expected to remain above average through early next week...before dropping down towards normal values by Christmas day. && Discussion... today through Saturday night...this will be an active and very wet period as a pair of storm systems move through the forecast area. The first today followed by the second Saturday. This will result in measurable precipitation for all locations, with valley rain and mountain snow. For today and tonight a vigorous frontal system will move through the forecast. The warm over-running precipitation moved into the region last evening and satellite imagery shows the cold front moving onto the Cascades early this morning. This front will cross the Cascades around 12z and should be east into Montana by this afternoon. So expect drying from the west beginning near sunrise then traversing the forecast area through the day. Temperatures will be on the warm side with highs around 10 degrees above normal * precipitation: yes and for just about all locations. With an upper level jet paralleling the front and southerly low level flow early this morning even the normally shadowed out lower east slopes and deep basin will see measurable precipitation. As the cold front moves through the region later this morning the flow will shift the focus of the heaviest precipitation across the northern mountains and finally the Panhandle mountains this afternoon and this evening. Precipitation amounts will range from .10-.20 for the low lands with anywhere from .25-.50 for the mountains, and possibly as much as .75 near the crest of the Cascades. Some showers will linger across the Panhandle mountains this evening, otherwise there will be a brief break in the wet weather. * Precipitation type: warm air advection and southerly flow will result in snow levels at or above 3-4k feet for valley rain and mountain snow. The area of concern will be for the Methow Valley where the cooler air remains trapped, but even there temperatures are around freezing or a little more and any snow that falls will be wet. So a couple of inches for the Methow Valley this morning and 3-6 inches for the mountains above 3-4k feet. ..a strong winter storm expected to result in heavy rain and mountain snow across the northwest this weekend... Moving on to Saturday and Saturday night...this storm system is shaping up to be much wetter as the westerly flow will tap into an atmospheric river of very deep moisture. Model guidance has been pretty consistent the past several runs showing this moisture reaching the Cascades early Saturday morning and over-running the remainder of the region during the day Saturday. Isentropic up- Glide will be quite impressive and combined with the deep moisture means that everyone will get pretty wet. * Precipitation: yes and quite a bit. Through the entire event the Cascades can expect anywhere from 1-3 inches of liquid and perhaps more near the crest. The northern and Panhandle mountains .50-1.5 inches and for the low lands around a half inch from Saturday morning through Sunday morning. * Precipitation type: behind the first cold front temperatures will cool down with snow levels dropping down to 2.5-3.0k feet across the south and 1.5-2k feet across the north. Strong warm air advection will result in snow levels increasing through the day Saturday and finally rising above 6-7k feet across the south, but still only around 3.5-4k feet across the north. The challenge will again be the Methow Valley where the cooler air will be tougher to scour out. The models continue to be a little too cold for the Methow and I chose to go above guidance in these areas, and secondly with this much precipitation and warm air advection I would think these areas should mix out pretty well. Still there should be an extended period of snow accumulation for the Methow Valley with moderate snow accumulations possible. For the remainder of the mountain valleys it looks like they might start out with a snow/rain mix but quickly transition over the rain. Snow amounts in the Cascades could be in the 1-2 foot range above 4k feet and up to a foot or maybe slightly more for the northeast and Panhandle mountains by Sunday morning. The Methow could see as much as 5-7 inches. * Winds: 850 mb winds will climb up to around 40-45kt. The question will be if these winds can mix to the surface. Without a robust cold front this will be tough. So winds breezy to even windy in locations but likely not advisory speed. * Temps: very warm for the season with highs in the 40s on Saturday and 40-50 on Sunday. This will be 10-20 degrees above seasonal normals. Tobin Sunday and Sunday night...a cold front plows across the inland northwest on Sunday, helping to shunt the bulk of the moisture from the atmospheric river south and east of the region. Gusty westerly winds will develop by Sunday afternoon and evening with gusts to 30 kts. Under the west to northwest flow, precipitation will still be confined to the orographic favored areas like the Cascades crest, the Blue Mountains and the central Idaho Panhandle. Snow levels will be relatively high with mainly valley rain and mountain snow. The only exception would be some High Valley snow in the far northern valleys Sunday morning, but it looks the combination of the winds from the frontal passage and arrival of the drier air, will help mix out that colder air and help shut off the additional low elevation snow accumulations in the northern valleys. Also temperatures look to be warmest of the week on Sunday. Monday and Monday night..cooler and drier air to filter in from the north, giving the region a break from the precipitation. An upper level ridge will slowly migrate across the region. A few lingering showers are possible by early Monday morning across the northern mountains. Expect temperatures to cool late Monday night. Tuesday through the Christmas Holiday...the ridge aloft flattens allowing for a more active period. One weather disturbance will drop down from the northwest with a frontal band pushing through the region on Tuesday, skipping across the Columbia Basin but targeting the mountains. Chances for snow look good for Tuesday morning across the northern valleys and mountains, then snow levels will jump giving way to valley rain and mountain snow again for Tuesday afternoon and evening. This frontal band will slide south and stall across the Blue Mountains and southern Idaho Panhandle. Meanwhile the models show more energy dropping down from the Gulf of Alaska and strengthening the northern jet stream, but what they show happens to the frontal band are two differing scenarios. The GFS continues the trend that this northern disturbance will carve out a deeper trough which digs further south and pushes the boundary further into Oregon, and leaving much of the inland northwest drier. The 00z European model (ecmwf) bounced back its solution and shows the frontal band lifting northward and bringing a return of precipitation, mostly in the form of snow, back into the inland northwest. To avoid bouncing forecasts around, opted to lean more toward climatology gives most areas a chance of snow for Christmas eve day, then tapering off by Christmas eve night, although confidence is marginally poor. A drier northwest flow aloft will move into the region with cooler, more seasonal temperatures into the end of the week. /Rfox. && Aviation... 12z tafs: a frontal system is moving through the eastern portions of the area this morning. Light to moderate precipitation will effect the eastern taf sites for a few more hours...otherwise expect drying from the west. Current VFR/MVFR conditions for the eastern zones will begin to decrease MVFR/IFR after 15z as the rain comes to an end and fog/stratus develops. Improvement to VFR is expected after 22z. Stratus/fog will reform after 06z lowering conditions back to IFR. Current IFR/LIFR conditions for kmwh/keat may not see as much improvement. Cigs/vsby may increase to MVFR at keat after 21z...but the fog/stratus is expected to reform around 06z again tonight. Tobin && Preliminary point temps/pops... Spokane 41 33 40 38 46 36 / 100 10 90 100 50 20 Coeur D'Alene 41 33 39 36 44 36 / 100 20 90 100 70 50 Pullman 44 34 42 40 50 41 / 100 10 90 100 70 60 Lewiston 46 33 45 42 54 43 / 90 10 80 100 70 70 Colville 39 32 36 34 41 31 / 100 20 100 90 50 20 Sandpoint 37 32 37 34 40 34 / 100 30 80 100 70 60 Kellogg 38 31 38 34 41 36 / 100 40 80 100 100 90 Moses Lake 44 34 41 39 47 36 / 50 10 90 50 30 20 Wenatchee 42 32 37 37 45 36 / 30 20 90 60 40 20 Omak 38 30 34 34 39 32 / 80 20 90 80 30 20 && Otx watches/warnings/advisories... Idaho...none. Washington...air stagnation advisory until noon PST today for east slopes northern Cascades-Moses Lake area-northeast mountains- Okanogan Highlands-Okanogan Valley-upper Columbia Basin- Waterville Plateau-Wenatchee area. && $$