Wow, you already have the finals, I just started school. Anyway if you look at any visible Sat imagery or any other imagery for this matter. You will notice a area of disturbed weather right to the left of where Jeanne is. Now this is a trough, or a elongated area of low pressure. These troughs kind of attract storms, the low part at least because hurricanes move in the direction of the prevailing flow of the atmosphere and these lows affect that flow. Think of the atmosphere as a fluid, the hurricane as an eddy and the trough as a whirpool it attracts the hurricane. Then the ridge is the exact opposite of a trough, hurricanes generally speaking don't like ridges and back away, sort of. There's a lot more to it them then just understanding upper level air features but a book on this material would greatly help. Only problem is there is very few books, and good books at that too. The best advice I can give for you is to learn through experince. Hope that helps!
-------------------- "I became insane with horrible periods of sanity"
Edgar Allan Poe
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