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A more systematic long period analysis of cloud cover reveals the following features of 47r3 forecasts (relative to 47r2):
| Type | Tropics (30S - 30N) | Extra Tropics |
|---|---|---|
| Total cloud cover | Mixed picture but more overall (by 3%) | More (by 4%) |
| High cloud cover | More | Slightly more |
| Medium cloud cover | Slightly Less | Mixed picture |
| Low cloud cover | Very mixed picture | More |
"Mixed picture" means marked regional variations. The maximum change at any location in any of these classes is about 15%.
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