I went to the NOAA website of historical hurricane tracks:
NOAA historical hurricane tracks
and got a list of all hurricanes, category 1 or higher, that passed within 150 nm of Louisiana. In the last 10 years, there have been 10 of these storms, so an average of one per year.
I looked at the WTI price before and after the maximum wind speed. In the table above, "pre-storm" is the price 10 days before the event. The "storm run up" is the average price of the 5 days before the storm, and "storm recovery" is the average of the five days after the storm. Post storm is the price 10 trading days after the storm.
Also, I looked up the US crude oil production, a week or two before the storm, and at the low point after the storm.
So we learned a few things from this:
a. In a pretty substantial number of cases, about half the time, the post-hurricane price was about the same or lower than the pre-hurricane price.
b. In only about half of the cases was the "panic price" in the storm runup period higher than the immediate post-storm recovery.
c. There were 5 storms that at one point in the gulf were category 4 or higher, and the minimum effect on oil production was .7 mbpd. This might or might not seem like much, but nowadays this would be nearly 15% of US production. I combined Cindy and Dennis together, since they hit so close to one another, into one event.
d. Naturally this points out the really unusual nature of 2005, with three major storms in this area in one year.
e. Past performance is not necessarily a predictor of future results, but I believe we have already seen the worst case scenario, and lived through it, so I think we have an idea of what to expect. On average, we can expect one storm going through this area at some time during the year.
f. We will probably look back at Ivan being a really unusually destructive storm. It caused a 13% price increase, knocked out a lot of production, and killed thuderhorse.
Edit: changed the price calculation: price change = post-storm price minus pre-storm price divided by pre-storm price.



