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Dr. Jack's Forecast of the atmosphere's thermal producing layer are Accurate!
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Dr. Jack is a meteorologist, sail plane pilot who wrote a computer program
to create a profile of the day's soaring potential.
He then plots this data in a series of maps that are easy to understand.
They include: The vertical strength (fpm) of the day's
thermals. How high the thermals can be expected to rise. Whether the wind
will be so strong that the thermals will be blown apart and poorly formed. How
high cloudbase might be and if the day will overdevelop.
See below the link to a sample page of these maps from a good XC day.
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Until this year, his project has been free but Jack has become a slave to his own invention
and doesn't even have any time to go flying. So; to provide him minimal compensation for his time
and to fund the project to keep it alive, he is now asking for:
a $13 Donation for the "Current Day" forecast
or $20 for the Current Day plus the next 2 days.
More Info on his decision
Next Year there may aalso be a yearly Subscription Fee but it should be less.
The pilots using his material feel it is worth every penny.
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The "Thermal Updraft Velocity" map is free (After Registration). When you have
subscribed you will be able to view all the maps on Jack's website or on ours.
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Here -- you will find links to his website, pages to help you navigate his material
and a Sample presentation of his predictions.
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Jack's 2 step Subscription process begins with Registration.
We recommend our "Subscription Simplified" page.
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DrJack Introduction
Home Page