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#1
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Everytime I have used xcskies over the past month it is plagued with
problems. The contour of the top of useable lift maps are straight lines that go for 100 some miles, which is obviously false. And the selection of dates and times is 90 percent missing. The areas that historically had higher lift, such as higher elevation. Now are reversed and show lower lift. I am wondering if the new format is screwed up....or if I am not using the website correctly. Anyone else having the same issues? |
#2
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On Mar 3, 4:30*am, Scott Alexander
wrote: Everytime I have used xcskies over the past month it is plagued with problems. The contour of the top of useable lift maps are straight lines that go for 100 some miles, which is obviously false. *And the selection of dates and times is 90 percent missing. *The areas that historically had higher lift, such as higher elevation. *Now are reversed and show lower lift. I am wondering if the new format is screwed up....or if I am not using the website correctly. Anyone else having the same issues? Your post prompted me to take a look. My XCSkies looks okay. A temporary condition maybe? |
#3
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Version 2 came out at the same time as my last trip to Australia. I
used it to set tasks and it seemed fine. Even uploading flight logs to compare them with the day's forecast looked accurate. I noticed something like that in the San Joaquin Valley for a while. Too-regular lines that didn't seem to move much hour to hour or even day to day, while the Sierra Nevada and Mojave Desert seemed fine. There were a couple of other glitches with version 2 which I fed back information on. Chris took care of those things quickly. Contact Chris (info (at) xcskies.com) with your specific questions, including the location where you're finding this problem. He's quite responsive. Jim |
#4
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Thanks I sent him an email describing the glitches. It is the same on
both of my computers. The main problem is the inability to access forecasted weather on the NAM or GFS. Tommorow wont show up, 2 days out only has one forecast available at 13:00 and 3 days out has no forecast available. It's been doing this off and on ever since the format changed a month or so ago. Does anyone else have this specific problem? |
#5
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Chris is looking into it.
Jim |
#6
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I just checked my login
3 day forecast is looking fine. BT "Scott Alexander" wrote in message ... Thanks I sent him an email describing the glitches. It is the same on both of my computers. The main problem is the inability to access forecasted weather on the NAM or GFS. Tommorow wont show up, 2 days out only has one forecast available at 13:00 and 3 days out has no forecast available. It's been doing this off and on ever since the format changed a month or so ago. Does anyone else have this specific problem? |
#7
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On Mar 3, 9:03*pm, "BT" wrote:
I just checked my login 3 day forecast is looking fine. BT "Scott Alexander" wrote in message ... Thanks I sent him an email describing the glitches. *It is the same on both of my computers. The main problem is the inability to access forecasted weather on the NAM or GFS. *Tommorow wont show up, 2 days out only has one forecast available at 13:00 and 3 days out has no forecast available. *It's been doing this off and on ever since the format changed a month or so ago. Does anyone else have this specific problem?- Hide quoted text - - Show quoted text - with this new version I've never been able to get a forecast. Only the past. Hope this gets sorted out soon. Dan |
#8
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Interesting to note that when compared to Dr Jacks BlipMaps, the poor
lift over the Sierras shows in those maps as well (look at March 3). This is due to surface heat flux values being too low for the mountains which is represented in the raw model output data. This data comes from Land Surface Models (LSMs) that try to derive the surface characteristics. During transitional months (mostly spring time) the models use a statistical approach for turning on certain key elements such as snow cover, leaf area index values, and so on. Because of this, when you compute the lift potential and use surface heat flux values to determine the top of usable lift, the result shows poor areas of lift over mountains. With shallow lift profiles, thermal velocities are calculated as being abnormally low. In the US, the Sierras and Rockies have this problem in March and April. In Europe, the Alps are often poorly characterized over spring. In fact, hang gliding records were broken last April in the Alps (for out and returns) and all of the models used for forecasting showed that top of lift was at ridge top heights which was grossly inaccurate. This problem has plagued boundary layer forecasts for a long time and there's not a good solution yet. The best approach (being used now) is to rely on data collected historically and then represent the land characteristics statistically. Eventually, real-time remote sensing from satellites will likely replace the source of this data, but it will take time. -Chris Galli On Mar 3, 10:03*pm, "BT" wrote: I just checked my login 3 day forecast is looking fine. BT "Scott Alexander" wrote in message ... Thanks I sent him an email describing the glitches. *It is the same on both of my computers. The main problem is the inability to access forecasted weather on the NAM or GFS. *Tommorow wont show up, 2 days out only has one forecast available at 13:00 and 3 days out has no forecast available. *It's been doing this off and on ever since the format changed a month or so ago. Does anyone else have this specific problem? |
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