February 29, 2008

THE WEATHER

2/29/2008 Weather Discussion: The current high clouds are the first indication that a cold front is approaching. This will bring snow to the mountains tonight and tomorrow. Long-term models show high pressure producing a dry day Sunday with another system moving in on Monday. Another dry period is shaping up for the middle of the week. Forecast from Friday 4pm to Saturday 4am Precipitation .5 in. Water 4-8 in. Snow Temperatures Low 26 High 34 Winds 5-15 SW Forecast for Saturday 4am to 4pm Precipitation .25 in. Water 3-5 in. Snow Temperatures Low 26 High 30 Winds 10-20 W gust TRENDS AND TIMING Precipitation: There is some conflict on the timing of the arrival of the precipitation - so any time between 2pm and 10pm tonight. If the moisture arrives early we could see some initial rain at the base but precip. should turn to snow through the night. A Puget Sound Convergence could enhance orographic snow fall at times. Snow expected to slowly turn to snow showers and eventually end by 4am Sunday. Freezing levels: Temps will begin to fall after 2pm today. Freezing levels should drop below pass level by 10pm tonight. Freezing levels could bottom out around 2000’ by midday tomorrow and then begin to rise again. Winds: Winds will swing SW and then West as the front moves through. A convergence pattern will keep the winds gusty and persistent through most of tomorrow. Models aren’t showing wicked winds but could see gust to 40mph at times. jdm

February 28, 2008

THE WEATHER

2/28/2008 Weather Discussion: High-pressure will keep our mountain dry until tomorrow afternoon. A nice system with cooler temps will bring us snow for the weekend. Long-term models show a series of storms separated by high pressure ridges will be the pattern for most of next week. Forecast from Thursday 4pm to Friday 4am Precipitation 0 in. Water 0 in. Snow Temperatures Low 32 High 40 Winds 0-5 SE Forecast for Friday 4am to 4pm Precipitation .10 in. Water trace in. Snow Temperatures Low 32 High 36 Winds 0-10 SE TRENDS AND TIMING Precipitation: Dry until tomorrow afternoon. The leading edge of the precipitation should show up around 2pm tomorrow. We could see some initial rain below 4500’ but that should be short lived as temps quickly fall with the sun set. Storm totals are uncertain at this time but could get as much as 1” of water by Sunday. I will dial in storm details with tomorrow’s model run. Freezing levels: Could see freezing levels reach 6k today. With some added sun breaks, could get surface temps to reach 40f today. Freezing levels will slowly fall tomorrow dropping below pass level sometime after 4pm. Winds: Weak east flow will develop overnight and stay until tomorrows cold front passes through. Winds should start the SW-W shift around midday tomorrow. A strong westerly push with convergence possibilities will ramp up the wind potential for tomorrow evening. jdm

February 27, 2008

THE WEATHER

2/27/2008 Weather Discussion: Our on-again-off-again pattern will continue for the remainder of the week. High pressure will once again build over the PNW slowly drying up the atmosphere for tomorrow and most of Friday. Long-term models show a more organized system arriving sometime late Friday. This seems to be gaining energy – This could be a good snow producer for the weekend. Forecast from Wednesday 4pm to Thursday 4am Precipitation 10th in. Water trace in. Snow Temperatures Low 30 High 34 Winds 5-15 W Forecast for Thursday 4am to 4pm Precipitation 0 in. Water 0 in. Snow Temperatures Low 30 High 38 Winds 0-5 S TRENDS AND TIMING Precipitation: These light mountain rain/snow showers will slowly taper off in the next 24 hours - should be mostly dry for Thursday and Friday. Next chance of moisture will be after 4pm Friday. Freezing levels: Freezing levels will stick around the 4000’ mark until tomorrow afternoon. Freezing levels are then expected to sneak up to 5k or even 6k tomorrow night and remain there until Friday nights cold front arrives. Winds: Gusty ridge top winds should stick around until the early morning hours. Not expecting the winds to get much stronger than they are right now. The westerly flow should turn southerly tomorrow.

February 26, 2008

THE WEATHER

2/26/2008 Weather Discussion: Dry weather is expected until tomorrow morning when a warm front will bring a couple of drizzly days to the mountains. Long-term models show high pressure rebuilding on Thursday with another potential disturbance Friday night and Saturday. Seem like we are stuck in this pattern of a couple of dry days followed by a few wet days. Forecast from Tuesday 4pm to Wednesday 4am Precipitation Lt. 10 in. Water trace in. Snow Temperatures Low 30 High 32 Winds 0-5 SW Forecast for Wednesday 4am to 4pm Precipitation .25 in. Water 1-3 in. Snow Temperatures Low 30 High 34 Winds 10-15 W TRENDS AND TIMING Precipitation: The moisture should reach the mountains after 4am tomorrow morning. Probably mostly see light rain at the base and snow at the higher lifts. Precipitation should be all done by 4am Thursday. Freezing levels: Freezing levels expected to reach 4500 -5000’ by 4am tomorrow morning. Freezing levels will bounce between 4k and 5k through the day. Winds: Light east flow will slowly give way to a stronger westerly influence by tomorrow. Not expecting huge winds but it will be breezy for most of the day.

February 25, 2008

THE WEATHER

2/25/2008 Weather Discussion: A weak high pressure ridge will develop today keeping things relatively dry for the next 24 hours or so. A warm front followed by a cold front will move through tomorrow night. This may have some initial rain at first, but should give us some snow on Wednesday. Long-term models show another brief dry period Thursday before another series of weak systems move in for the weekend. Forecast from Monday 4pm to Tuesday 4am Precipitation Lt .10 in. Water trace in. Snow Temperatures Low 26 High 32 Winds 0-5 SW Forecast for Tuesday 4am to 4pm Precipitation Lt.10 in. Water trace in. Snow Temperatures Low 28 High 36 Winds 0-5 SSW TRENDS AND TIMING Precipitation: A stabilizing atmosphere should dry up most of the lingering snow showers today and tomorrow. The next chance of moisture is expected after 4pm tomorrow. Freezing levels: Freezing levels should hold around the 3000’ level through 4pm tomorrow. Temps expected to rise with tomorrow nights warm front. Freezing levels will drop back down below pass level for Wednesday. Winds: Light SW winds will prevail until tomorrow nights warm begins to

February 22, 2008

THE WEATHER

2/22/2008 Weather Discussion: A low-pressure moving up the coast will spin some intermittent snow showers through the mountains tonight. A dry day is expected tomorrow. Long-term models show some weak showers being pushed up from the south on Sunday/Monday but they should be very little if anything. High pressure will reestablish itself for the middle of the week. Forecast from Friday 4pm to Saturday 4am Precipitation Lt .10 in. Water Trace in. Snow Temperatures Low 24 High 32 Winds 5-10 SW Forecast for Saturday 4am to 4pm Precipitation Lt. 10 in. Water Trace in. Snow Temperatures Low 24 High 30 Winds 5-10 W TRENDS AND TIMING Precipitation: Light mountain snow showers may pass through from time to time for the next 12 to 24 hours. Freezing levels: Freezing levels should lower to near 2500’ by 4am tomorrow. Freezing levels should rebound to near pass level through the day and stay there through Sunday. Winds: East flow should give way to a SW then W flow over night. East flow is expected to reestablish itself late tomorrow night and strengthen on Sunday.

February 21, 2008

THE WEATHER

SORRY FOR THE FORMAT SOME HOW THE BLOG CHANGES IT. 2/21/2008 Weather Discussion: Another dry day for the mountains. A small low pressure system is developing off the coast – this should bring some light snow to the Pass tomorrow and Saturday. Long-term models show drying for Saturday afternoon and Sunday. A large low pressure driving into California will bring something our way for next week. Not sure what that will be at this point, but it is worth keeping an eye on. La Nina? What happened to our friend La Nina? Below is part of a report from the Climate Prediction Center. Don’t count winter out just yet. Forecast from Thursday 4pm to Friday 4am Precipitation Lt .10 in. Water trace in. Snow Temperatures Low 30 High 36 Winds 5-10 E Forecast for Friday 4am to 4pm Precipitation .10 in. Water 1-2 in. Snow Temperatures Low 28 High 32 Winds 5-10 E TRENDS AND TIMING Precipitation: Off shore flow will keep any moisture from getting to the mountains until after 4am tomorrow. Light mountain snow showers expected tomorrow – Atmosphere should stabilize by 4pm Saturday to start the dry period. Freezing levels: Freezing levels should slowly fall tonight and then hover between 3000’ and 4000’ until Saturday. Winds: East/off shore flow will continue through Saturday as well. Some gusty east winds will show up from time-to-time as these weak systems pass through. La Niña is expected to continue through the Northern Hemisphere spring 2008. Current atmospheric and oceanic conditions indicate that La Niña has continued to strengthen in the tropical Pacific… Consistent with these oceanic conditions, stronger-than-average low-level easterly and upper-level westerly winds persisted across the central equatorial Pacific, convection remained suppressed throughout the central equatorial Pacific, and enhanced convection covered the far western Pacific. Collectively, these oceanic and atmospheric conditions are similar to those accompanying the last strong La Niña episode in 1998-2000. The recent dynamical and statistical SST forecasts for the Niño 3.4 region indicate a moderate-to-strong La Niña through the rest of the Northern Hemisphere winter, with the likely continuation of a weaker La Niña through April-May-June (Fig. 5). Thereafter, there is considerable spread in the models, with approximately one-half indicating La Niña could continue well into the Northern Hemisphere summer. Current atmospheric and oceanic conditions and recent trends are consistent with the likely continuation of La Niña through the Northern Hemisphere spring 2008. Expected La Niña impacts during February-April include a continuation of above-average precipitation over Indonesia and below-average precipitation over the central equatorial Pacific. For the contiguous United States, potential impacts include above-average precipitation in the Northern Rockies, the Pacific Northwest, and the Ohio and Tennessee Valleys. Below-average precipitation is expected across the South, particularly in the southeastern states.

February 20, 2008

THE WEATHER

2/20/2008 Weather Discussion: The big news in the sky tonight will be the full Lunar Eclipse between 5pm and 7pm – that should be cool if the high clouds don’t spoil the view. Other than that, the overall weather pattern is pretty benign with little energy moving through the PNW. We should have a few nice days until Friday when things will begin to change. Long-term models show Friday’s system weakening as it approaches the coast. Confidence is low on what this will bring – for now it looks like light snow Friday and Saturday. Forecast from Wednesday 4pm to Thursday 4am Precipitation 0 in. Water 0 in. Snow Temperatures Low 26 High 36 Winds 0-5 SE Forecast for Thursday 4am to 4pm Precipitation 0 in. Water 0 in. Snow Temperatures Low 26 High 34 Winds 0-5 E TRENDS AND TIMING Precipitation: No moisture expected until Friday morning. Freezing levels: Freezing levels will fluctuate between 3500’ and 4500’ until Saturday. Winds: Very light SE winds will prevail tonight. Weak East flow will develop tomorrow.

February 18, 2008

THE WEATHER

2/18/2008 Weather Discussion: High pressure will prevail through tomorrow. High clouds will begin to show up tomorrow as a weak system approaches. We could see some light rain/snow tomorrow night. Long-term models show a dry day on Wednesday before some bigger systems arrive on Thursday. These systems are pulling cooler air from the north, therefore, other than some initial light rain it should be snow for the most part. Unsettled weather expected to continue into the weekend. Forecast from Monday 4pm to Tuesday 4am Precipitation 0 in. Water 0 in. Snow Temperatures Low 26 High 36 Winds 5-10 E Forecast for Tuesday 4am to 4pm Precipitation 0 in. Water 0 in. Snow Temperatures Low 28 High 34 Winds 0-10 E TRENDS AND TIMING Precipitation: No moisture showing up on the radar until after 7pm tomorrow. Freezing levels: Freezing levels will slowly fall below pass level after 7pm tomorrow night. We will have another melt/freeze cycle in our snowpack for tomorrow. Winds: Breezy east flow should start to tapper tonight. East flow should prevail until the system passes through tomorrow night.

February 16, 2008

THE WEATHER

2/16/2008 Weather Discussion: High pressure will build over the PNW today bringing dry pleasant weather to the mountains for the weekend. Temperature will be cool at night with pleasant temps during the day. Long-term models show a low pressure trough approaching the coast on Tuesday. This has potential to launch us into another winter storm cycle. Forecast from Saturday 4pm to Sunday 4am Precipitation 0 in. Water 0 in. Snow Temperatures Low 24 High 34 Winds 0-5 NE Forecast for Sunday 4am to 4pm Precipitation 0 in. Water 0 in. Snow Temperatures Low 24 High 36 Winds 0-10 E TRENDS AND TIMING Precipitation: Clouds should burn off and the sun should show up today. Dry stable weather expected until Tuesday. Freezing levels: Freezing levels will be interesting as east flow tries to keep surface temps low. Freezing levels west of the crest could be as high as 8000’ by Sunday while the east side should stay near pass level. Winds: East flow will develop overnight. We could see some gusty east winds through the pass as the gradient increases west of the crest.

February 15, 2008

THE WEATHER

2/15/2008 Weather Discussion: A weak cold front will drift down from north today bringing some light snow to the mountains. High pressure will quickly build in overnight providing a very nice weekend of warm days and cool nights. Long-term models show high pressure remaining in place until early next week. A low pressure system approaching the coast may bring wetter weather by Tuesday or Wednesday. Forecast from Friday 4pm to Saturday 4am Precipitation .25 in. Water 1-3 in. Snow Temperatures Low 24 High 30 Winds 0-5 NW Forecast for Saturday 4am to 4pm Precipitation 0 in. Water 0 in. Snow Temperatures Low 24 High 36 Winds 0-10 W TRENDS AND TIMING Precipitation: The cold front has slowed its approach some today, therefore, we should start to see some snow around 4pm today and then it should be all said and done by midnight. Dry tomorrow. Freezing levels: Freezing levels will slowly rise through the weekend. Cold air to the east will allow cool night time temps to push through the pass on Sunday. Winds: W/NW flow will hold until tomorrow afternoon. A strong east/off shore flow expected to develop by Sunday.

February 14, 2008

THE WEATHER

2/14/2008 Weather Discussion: Warm air will move in overnight which could bring a brief period of light rain before a cold front moves through tomorrow changing things to snow. We could get a nice dose of snow tomorrow afternoon/evening. Long-term models show high pressure building again for the weekend; this should bring us a good 5 days or more of dry weather starting Saturday. A deep low pressure trough is creeping into the picture for the second part of next week. Forecast from Thursday 4pm to Friday 4am Precipitation Lt. 10 in. Water 0 in. Snow Temperatures Low 26 High 34 Winds 0-5 N Forecast for Friday 4am to 4pm Precipitation .25 in. Water 1-3 in. Snow Temperatures Low 28 High 34 Winds 5-10 SW TRENDS AND TIMING Precipitation: The first push of moisture should show up after 7am tomorrow– this could start out as light rain at the lower mountain. Rain should turn to snow after noon with some potential moderater snow showers through the afternoon hours -precipitation should be done by midnight. Freezing levels: Freezing levels will rise to peak around 5000’ by midnight tonight. Freezing levels are expected to drop below pass level after noon tomorrow. Freezing levels should reach its bottom end of 2500’ sometime early Saturday morning. Winds: The northerly flow will slowly taper off tomorrow. Once the cold front hits the wind will shift to SW then west. A weak short lived convergence period could happen tomorrow afternoon.

February 13, 2008

THE WEATHER

2/13/2008 Weather Discussion: Light mountain snow showers will taper off today as high pressure builds over the mountains. This will bring us dry weather through Friday. Long-term models show a weak system moving through late Friday with high-pressure rebuilding for the weekend. Forecast from Wednesday 4pm to Thursday 4am Precipitation Lt .10 in. Water trace in. Snow Temperatures Low 16 High 24 Winds 0-5 N Forecast for Thursday 4am to 4pm Precipitation 0 in. Water 0 in. Snow Temperatures Low 16 High 26 Winds 0-5 NE TRENDS AND TIMING Precipitation: Some energy moving through the North Cascades could bring us an occasional snow shower or two through tonight. Dry conditions expected tomorrow and most of Friday. Freezing levels: Freezing levels will continue to drop some today reaching 1500’ by 7pm. Warm air from the south will then invade with the building high pressure. This will slowly raise freezing levels to eventually reach above pass level by midday Friday. Winds: Light North winds will eventually develop into a weak east flow through tomorrow. Winds should be calm for a nice change.

February 12, 2008

THE WEATHER

2/12/2008 Weather Discussion: Snow is expected to develop as a cold front passes through the PNW later today. Light snow slowly tapering off tomorrow with cooler temps. Long-term models show high pressure building over the PNW tomorrow, this should bring a dry and cool period for Wednesday night and Thursday. A warm front is expected to raise freezing levels back to or above pass level on Friday/Saturday. Forecast from Tuesday 4pm to Wednesday 4am Precipitation .25-.5 in. Water 4-6 in. Snow Temperatures Low 18 High 32 Winds 5-15 W gusty Forecast for Wednesday 4am to 4pm Precipitation .25 in. Water 1-3 in. Snow Temperatures Low 16 High 24 Winds 0-10 NW TRENDS AND TIMING Precipitation: The moisture is expected to arrive after 2pm today – may start out as rain but should be snow by 7pm. Snow should slowly taper off through tomorrow. Wednesday night, Thursday and probable Friday look dry. Freezing levels: Freezing levels should drop quickly below pass level by 7pm tonight. Freezing levels expected to reach 2000’ by 4am tomorrow morning. Temps expected to stay low until Friday’s warm front. Winds: Could see a gusty period as the cold front passes through tonight after 7pm. Winds should taper and begin a W –NW – N – E swing and by Thursday morning.

February 11, 2008

THE WEATHER

2/11/2008 Weather Discussion: A warm front will push up from the south tonight bringing warm temps and some light rain snow mix to the Pass. Tomorrow a cold front will bring snow to the mountains. Long-term models show high pressure aloft developing Wednesday/Thursday which will bring us a few days of “calm” dry weather. More active weather is on the horizon for the weekend. Forecast from Monday 4pm to Tuesday 4am Precipitation Lt .10 in. Water trace in. Snow Temperatures Low 28 High 34 Winds 10-20 W Forecast for Tuesday 4am to 4pm Precipitation .25 in. Water 1-4 in. Snow Temperatures Low 26 High 32 Winds 5-15 W TRENDS AND TIMING Precipitation: Light mountain snow showers should eventually taper off later today. A warm front arriving sometime after 4pm will change what is left of the moisture to rain/snow mix. The night should be relatively dry. The next push of moisture will arrive in the mountains after 4am tomorrow. This will start out as rain in the base and a rain snow mix up to 5000’. A cold front arriving sometime after 2pm that will bring a welcome dose of snow to the Pass. Freezing levels: Freezing levels should rise to 4500’+ by the early morning hours. Freezing levels will slowly drop below pass level sometime after noon tomorrow and stay low through Wednesday. Winds: A persistent westerly flow will keep gusty winds around for the next 24 hours. Shouldn’t be too bad. Winds should calm before the arrival of tomorrows cold front. Strong frontal winds are expected with the cold front tomorrow afternoon.

February 9, 2008

THE WEATHER

2/9/2008 Weather Discussion: The warm front that passed through last night will leave mild temps and mountain showers in its wake. A cold front is expected tonight which will drop freezing levels. Long-term models show the NW flow shifting to a W/SW flow. This means the over all temperature regimes will be warmer. Storms continue to stack up but the general track of these storms will be to the north. This will allow some breaks between storms through the week. Forecast from Saturday 4pm to Sunday 4am Precipitation .5-.75 in. Water 4-6 in. Snow Temperatures Low 28 High 34 Winds 5-15 WSW Forecast for Sunday 4am to 4pm Precipitation .5-.75 in. Water 5-10 in. Snow Temperatures Low 24 High 28 Winds 10-20W TRENDS AND TIMING Precipitation: Mixed rain/snow should turn to all snow after 4am tomorrow morning. Several pushes of moisture will bring periods of heavy snow for the next 24 -36 hours. A break is expected Monday morning. Freezing levels: Freezing levels will hover right at Pass level until the passing of the cold front after 4am tomorrow morning. Freezing levels will then hold at +-3500’ through Monday. Winds: Wind will still be a nuisance but shouldn’t see much above 40mph. Wind is expected to be done by Monday morning.

February 8, 2008

THE WEATHER

2/8/2008 Weather Discussion: The next 24 hours will be interesting as a warm front enters the picture. A steady stream of moisture with warmer temps will bring a potential of rain to the mix. The wind is expected to taper this afternoon but remain gusty. Long-term models show the next organized system coming through Saturday night. A well deserved dry period is showing up for late Sunday/Monday. Forecast from Friday 4pm to Saturday 4am Precipitation .75-1 in. Water 8-12 in. Snow Temperatures Low 26 High 32 Winds 5-15 W Forecast for Saturday 4am to 4pm Precipitation .75 in. Water 1-5 in. Snow Temperatures Low 30 High 36 Winds 20-40 W TRENDS AND TIMING Precipitation: Heavy snow should continue until after midnight. Snow expected to turn to rain at the base by 4am. Mixed rain and snow is expected on the upper mountain by mid day. A stronger moisture push expected after 4pm tomorrow. Freezing levels: Freezing levels will slowly rise to peak near 5000’ by 4am tomorrow morning. Freezing levels will bounce between 4 and 5000’ through the day. Temps expected to drop below freezing sometime early Sunday morning. Winds: Winds should slow some today but remain gusty. Another strong frontal push is expected after 2am with gust potential above 50mph. Winds should slow tomorrow with breezy conditions persisting through the weekend.

February 7, 2008

THE WEATHER

-------------------------------------------------------------------------------- 2/7/2008 Weather Discussion: The wind should begin to taper this afternoon but the snow will intensify and continue through tomorrow as a strong NW flow continues to hammer the PNW. Long-term models show a brief break on saturday with a warmer temperatures. The action should pick up for Sunday and continue well onto next week. Forecast from Wednesday 4pm to Thursday 4am Precipitation 1 -1.5 in. Water 10-15 in. Snow Temperatures Low 24 High 28 Winds 15-30 W gust to 50 Forecast for Thursday 4am to 4pm Precipitation .5-.75 in. Water 6-12 in. Snow Temperatures Low 26 High 32 Winds 10-20W tapering TRENDS AND TIMING Precipitation: Snow should intensify as the convergence zone settles in for the night. Storm totals could be well in the +3" of water range. Wouldn't be surprise to see +30-40" of new snow by Saturday morning. Freezing levels: Freezing levels should drop to around the 3000' today. A warming trend is expected to start around 4am tomorrow with freezing levels reaching pass level by 4pm. Freezing levels will hold steady right near the 4000' through the weekend. Could see a mixed rain and snow event early Saturday morning. Winds: Winds should slowly taper through the evening to a managabel speed but is expected to be a nuisance until noon tomorrow. A steady westerly flow should continue into the weekend.

February 6, 2008

THE WEATHER

2/6/2008 Weather Discussion: The snow will lighten up a touch today before the next system plows into the PNW tonight. This system is packing a punch - could see very high winds and significant snow fall in the next 24 -36 hours. The general temperature range will also be warmer than what we have had. Long-term models show continued stormy weather through the weekend. There is a warming trend that may bring freezing levels at or just above pass level for the weekend. Forecast from Wednesday 4pm to Thursday 4am Precipitation .75 in. Water 8-12 in. Snow Temperatures Low 24 High 30 Winds 10-15 W Forecast for Thursday 4am to 4pm Precipitation 1 in. Water 10-14 in. Snow Temperatures Low 24 High 28 Winds 20-40W Gust 50+ TRENDS AND TIMING Precipitation: The next push of moisture is expected to arrive after 4pm today. Heavy mountain snow should increase through the night and continue tomorrow. Storm totals could be 2-3” of water by Friday morning. Freezing levels: Freezing levels will slowly rise through the day. A spike up to near pass level is expected after midnight but should be back down around 2500’ by 10am. \ Winds: Winds should mellow this afternoon. The next front is expected to pass through sometime after 7pm. Wind models are showing sustained 40+ knots after midnight and continuing through most of tomorrow. Could see gust well above 50mph through most of the day tomorrow.

February 5, 2008

THE WEATHER

2/5/2008 Weather Discussion: Snow and more snow will be on the menu as winter storms continue to move through the PNW. We could see a windy evening as a warm front followed by a cold front passes through in the next 12 hours. A lull tomorrow before a bigger, stronger, faster, system moves in tomorrow night and Thursday. Long-term models show a very active weather pattern persisting through the weekend. Forecast from Tuesday 4pm to Wednesday 4am Precipitation .75 in. Water 8-12 in. Snow Temperatures Low 18 High 26 Winds 10-20 W Forecast for Wednesday 4am to 4pm Precipitation .25 in. Water 4-6 in. Snow Temperatures Low 16 High 24 Winds 5-10 W TRENDS AND TIMING Precipitation: Snow intensity should increase through the day and night. A Convergence push after 7pm tonight could bump up snow totals. Upper level ridging between fronts will decrease the precipitation intensity tomorrow before the next system drives in tomorrow evening. Freezing levels: Freezing levels will briefly touch 4000’ sometime today but should quickly drop back to near 2000’ by midnight tonight. A similar spike in temps is expected Thursday morning. Winds: Winds should pick up later today as the fronts pass. Post frontal winds expected between 2pm and 4pm. A steady westerly push will then take shape through the night with wind tapering after 4am tomorrow. Another, potentially stronger wind event is showing up for Thursday.

February 4, 2008

THE WEATHER

2/4/2008 Weather Discussion: Another round of strong winter storms will drive into the PNW again this week. Snow should develop tonight and intensify tomorrow. Some warm periods and wind will be associated with these next few systems. Long-term models show the northern jet maintaining its push of storms through the week and into the weekend. Forecast from Monday 4pm to Tuesday 4am Precipitation .25 in. Water 2-4 in. Snow Temperatures Low 22 High 26 Winds 5-10 W Forecast for Tuesday 4am to 4pm Precipitation .75 in. Water 6-10 in. Snow Temperatures Low 24 High 32 Winds 10-30 W gusty TRENDS AND TIMING Precipitation: Light mountain snow is expected for today and tonight. The main push of moisture is expected to hit after 4am tomorrow. Heavy snow with a possible brief period of a rain/snow mixed period between 7am and 2pm. This looks to be confined to the lower mountain and should pass quickly. A Puget Sound Convergence is possible tomorrow afternoon enhancing our snow intensity. Storm totals by Wednesday morning could be in the +-2” of water range. Freezing levels: Freezing levels will begin to rise after 4am tomorrow morning. Temps should peak at +-4000’ around 10am. Temps should then quickly drop with freezing levels lowering below 2000’ by Wednesday morning. Winds: Rapid temperature changes and a strong westerly push will bring periods of strong winds tomorrow. The first potential will be associated with tomorrow cold front mid-day tomorrow. 30-40+mph WSW winds are showing up for tomorrow, this will be followed by a convergence pattern for the afternoon and evening hours.

February 1, 2008

THE WEATHER

2/1/2008 Weather Discussion: Snow is expected to slowly taper to a showery pattern through the night. Tomorrow’s system seems to be drifting south; therefore, the weekend is looking relatively quiet as far as snow accumulation. Cool temps will remain in our favor. Long-term models show intermittent snow showers lingering in the mountains through Monday. The northern jet still has it NW flow pattern and thus the threat of continued systems driving into the PNW for the coming week is good. Forecast from Friday 4pm to Saturday 4am Precipitation .25 in. Water 3-5” in. Snow Temperatures Low 20 High 24 Winds 0-10 W Forecast for Saturday 4am to 4pm Precipitation Lt .25 in. Water 1-3” in. Snow Temperatures Low 20 High 26 Winds 0-5 E TRENDS AND TIMING Precipitation: Snow will taper later today with some moderate snow showers passing through until midnight or so. Snow will pretty much be done after 10pm tomorrow. A few lingering showers tomorrow with Sunday being on the dry side. Freezing levels: Freezing levels will hold steady between 1500’ and 2500’ through the weekend. Winds: The wind should also begin to slack off through the day. Weak east flow is expected to develop over night and be the norm for most of tomorrow. A return to NW flow is expected for Sunday.

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