Re NOAA and temp trace predictions
Suggest those who are interested in the value of these predicted temp traces
obtain one for the coordinates of an Australian weather station near their
gliding site prior to the time of the daily balloon flight (11 am?). The
time could be earlier by a few hours or the previous day. I don't think it
would make much difference as the calculations would probably be based on
the latest balloon flight and most places of interest only do them every 24
hours now.
Then download the actual temp trace and compare with the predictions.
My own experience is that these predictions are not all that accurate and
lack the fine detail necessary for an evaluation of gliding conditions.
Personally I look at the latest temp traces available, the weather pattern,
aviation and general forecasts then make a judgement myself. If you are
really keen the best by far is an actual temp flight in the morning. At the
NSW State Comps at Lake Keepit we used a Jabiru which kept costs to an
acceptable minimum. If conditions are marginal or you want to get the most
out of a day, then you can't beat an on site temp trace,
Harry Medlicott
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