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joker seeker
Joined: 12 Aug 2006 Posts: 7953 | TRs | Pics Location: state of confusion |
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joker
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Wed Aug 07, 2019 10:52 am
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Does anyone know of a forecast product or some such that would help me make an informed guess as to how high I'd need to go in order to get above the marine layer when it has penetrated as far as the Cascade crest?
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MtnGoat Member
Joined: 17 Dec 2001 Posts: 11992 | TRs | Pics Location: Lyle, WA |
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MtnGoat
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Wed Aug 07, 2019 11:26 am
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try looking for aviation weather forecasts, using terms like "winds aloft", they're interested in the same data for other reasons.
Diplomacy is the art of saying 'Nice doggie' until you can find a rock. - Will Rogers
Diplomacy is the art of saying 'Nice doggie' until you can find a rock. - Will Rogers
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hbb Member
Joined: 06 Aug 2009 Posts: 405 | TRs | Pics
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hbb
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Wed Aug 07, 2019 11:53 am
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gb Member
Joined: 01 Jul 2010 Posts: 6308 | TRs | Pics
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gb
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Wed Aug 07, 2019 3:03 pm
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You can start at the National Service Seattle and go to Aviation Weather Observations for various airports (scroll left) https://www.wrh.noaa.gov/sew/aviation_air.php
Secondly, you can use the various webcams for the ski areas and highways for current conditions.
Finally, for forecasts go the the U of W MM5 (I use 12km grids) and find the cloud cover forecasts - you can look at various levels of the atmosphere.
However, realize that depending on flow velocity and direction clouds approaching the mountains can be lifted considerably, so, for instance a 4000' cloud deck at Marblemount may rise to peak levels along the crests. This also depends on stability of the atmosphere at different forecast levels. There is some intuitive hint of this in the observed freezing level and lapse rates at different elevations (in mb). So, for instance if the observed data is close to the dew point at some particular elevation that would imply the elevations (very rough) of cloud layers and potentially the tops at a layer of strong stability.....Skew T Sounding Displays https://www.ospo.noaa.gov/Products/atmosphere/soundings/sfov/skewt/uil.html
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Jaberwock Member
Joined: 30 Jan 2013 Posts: 722 | TRs | Pics Location: Bellingham |
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joker seeker
Joined: 12 Aug 2006 Posts: 7953 | TRs | Pics Location: state of confusion |
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joker
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Thu Aug 08, 2019 3:03 pm
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Thanks much especially hbb and gb!!
Jaberwock - yeah I love using satellite images for some sorts of planning, but in this case I actually want clouds, but I want to know if and where I might have a shot of hiking up out of them.
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Windstorm Member
Joined: 16 Dec 2014 Posts: 288 | TRs | Pics
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joker wrote: | Jaberwock - yeah I love using satellite images for some sorts of planning, but in this case I actually want clouds, but I want to know if and where I might have a shot of hiking up out of them. |
Do the satellite images give enough detail that you could see individual mountains sticking up out of the clouds?
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joker seeker
Joined: 12 Aug 2006 Posts: 7953 | TRs | Pics Location: state of confusion |
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joker
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Thu Aug 08, 2019 3:13 pm
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That's a good question. Not the ones I've looked at but I wonder if there are images I could get that level of both visual detail and geographical info from...
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nickmtn Member
Joined: 04 Jun 2014 Posts: 105 | TRs | Pics Location: Kirkland, wa |
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nickmtn
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Thu Aug 08, 2019 4:02 pm
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Jaberwock Member
Joined: 30 Jan 2013 Posts: 722 | TRs | Pics Location: Bellingham |
joker wrote: | Jaberwock - yeah I love using satellite images for some sorts of planning, but in this case I actually want clouds, but I want to know if and where I might have a shot of hiking up out of them. |
Totally. So for this example, you can see the clouds are NOT covering the central Olympics but are covering all puget sound. Can also be useful to figure out when the coast is fogged in. The county lines in purple dash are useful for locating your hike.
https://atmos.uw.edu/cgi-bin/latest.cgi?vis1km+-notitle
Should note that this link won't show much at night since it's dark out... Have to wait until the sun is up to check this clouds. Think it's updated every 15 minutes or so.
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Stefan Member
Joined: 17 Dec 2001 Posts: 5091 | TRs | Pics
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Stefan
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Thu Aug 08, 2019 5:03 pm
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joker seeker
Joined: 12 Aug 2006 Posts: 7953 | TRs | Pics Location: state of confusion |
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joker
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Thu Aug 08, 2019 10:05 pm
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Thanks Stefan!
And yeah, Jabberwock - this tells me where clouds are over the land but unless I'm missing something here not as much how high or low their tops are which is specifically what I'm trying to guess at (and they're also not a forecast). But super useful!!
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bk Member
Joined: 01 Jun 2012 Posts: 266 | TRs | Pics
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bk
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Fri Aug 09, 2019 3:36 am
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