As an alternate to the Zambretti I have found BT's Global Sager Forecaster to be in more detail
Based Upon:
The Sager Weathercaster: A Scientific Instrument for Accurate Prediction of the Weather
Copyright © 1969 by Raymond M. Sager and E. F. Sager
"The Sager Weathercaster predicts the weather quickly and accurately. It has been in use since 1942. Not a novelty, not a toy, this is a highly dependable, scientifically designed tool of inestimable value to travelers, farmers, hunters, sailors, yachtsmen, campers, fishermen, students -- in fact, to everyone who needs or wants to know what the weather will be."
378 possible forecasts determined from 4996 dial codes.
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Enjoy,
Paul