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Does the GOP have a Tampa hurricane problem?

by: Matt

Sat May 15, 2010 at 10:00:00 AM EDT


Well yes, hurricanes can of course hit Tampa and cause horrible destruction. The threat of hurricanes hurt Tampa's bid for the 2008 convention. But will a hurricane actually hit Tampa during convention week during 2012? The Hotline is very worried:

In choosing Tampa, FL, as the site of their '12 nominating convention, the RNC has selected a city that is among the most overdue for a major hurricane.
...
According to the National Hurricane Center in Miami, a hurricane passes within 65 nautical miles (about 75 miles) of Tampa every 6 years. For major hurricanes -- those with maximum sustained winds of 115 mph or greater -- it is one every 21 years.

Tampa has received a number of glancing blows, but Stacy Stewart, senior hurricane specialist at the National Hurricane Center, says it's only a matter of time before a major hurricane strikes the city.

"The Tampa Bay area, unfortunately, is one of those well-overdue places," Stewart said. "They're due for a hurricane. They're due for a major hurricane."

There is one mitigating factor for GOPers: While late Aug. is an active time for hurricanes and tropical storms, that isn't necessarily the case along FL's Gulf Coast. The most likely time for a landfalling hurricane along FL's Gulf Coast is later in the season, in late Sept. and Oct., according to Stewart.
...
OH GOP Chair Kevin DeWine was a member of the site-selection committee that chose Tampa. He said he didn't attend the site visit that some members did, but he also said the threat of tropical weather never came up during the committee's discussions."

"The things that we discussed and took into consideration were issues that were related to the business decision for the RNC," DeWine said.
...
Then again, proximity isn't even required for hurricanes to shut down a convention. In '08, the opening night of the GOP convo in St. Paul, MN, was scrapped while Hurricane Gustav made landfall near Cocodrie, LA, more than 1,200 miles south of the convention hall. Gustav was directly responsible for 7 deaths in LA and 4 in FL.

First, can someone explain to me how an area can become "overdue" for a hurricane? Sure, an earthquake or volcano builds up pressure over time, so the probability of the event increases over time. But a hurricane? I'm sure Dr. Stewart of the NHC is smarter than to actually imply that the odds of Tampa being hit by a hurricane actually increase the longer it's been since the last one.

So what are the odds Tampa is hit by a hurricane the week of the convention? The article says "a hurricane passes within 65 nautical miles (about 75 miles) of Tampa every 6 years". Lets define that as a "hurricane hitting Tampa", since the possibility of a hurricane can have a major impact, even if the hurricane ends up being minimal and 75 miles away. So once every 6 years. 

But what are the odds that it hits during convention week. Looking at this chart, 28% of all hurricanes occur in August. Since the frequency of hurricanes is much greater at the end of August than at the beginning, lets say 12% of hurricanes occur the last week in August. But, again from the article:

The most likely time for a landfalling hurricane along FL's Gulf Coast is later in the season, in late Sept. and Oct., according to Stewart.

I've been unable to find specific monthly frequencies for the Tampa area (if anyone has a link, please provide), so lets just make an educated guess, and cut the 12% potential down to 3%. So 3% of all Tampa hurricanes hit the last week in August. A hurricane comes every 6 years. Which means a hurricane should hit Tampa the last week in August once every 200 years. 

In 2006, the Tampa bid committee wrote:

The chance of a hurricane directly hitting the area while the convention is in town in early September 2008 is too small to affect the decision.

They were right. The Hotline should stop being Chicken Little.

Matt :: Does the GOP have a Tampa hurricane problem?

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Well, it's a crap shoot (0.00 / 0)
There are so many variables each and every season. I lived in the panhandle of Florida for 8+ years. Saw lots of Tropical Storms/Hurricanes jump around without getting more than a good rain from them, until one 12 month period. Then saw 3 eyes go right over us. Biggest one Opal. So you just never know. Even harder to predict more than during that current season or month since weather patterns steer the storms and they are ever changing. And water temperature and depth seem to add or decrease strength. Like where I lived in Florida the water was shallow out quite a ways so the storms weaken as they approach shore. I think Tampa is similar.

But that being said, Sperling's Best Places has Tampa as #4 on the list of Most likely to be hit by a major hurricane:
http://www.bestplaces.net/docs...

  1.  Southeast Florida (Miami-Fort Lauderdale-West Palm Beach)
  2. Key West and the Florida keys
  3. Southwest Florida (Fort Myers-Naples)
  4. West Florida (Tampa-St. Petersburg-Sarasota-Clearwater)
  5. Outer Banks islands, NC (Cape Hatteras)
  6. Central Texas Gulf coast (Galveston)
  7. Central Florida Atlantic coast (Melbourne-Cocoa Beach)
  8. Florida Panhandle (Pensacola-Panama City)
  9. Central Gulf coast (New Orleans, LA-Biloxi, MS-Mobile, AL)
 10. South Texas Gulf coast (Corpus Christi-Brownsville)


??? (0.00 / 0)
Central Gulf Coast is #6???  I lived in the Houston-Galveston area for almost 20 years and still have family down there.  The natural steering patterns make it much more likely that a hurricane will hit Brownsville-Corpus (if it never gets far enough North to begin to turn from a westward track) or that it will curve into Louisiana or Mississipi.

[ Parent ]
Rita might have influenced it. (0.00 / 0)
n/t

[ Parent ]
Oh yeah, Dolly 2 (0.00 / 0)
There have been 2 in the past 3 years for Central to North Central Texas.

[ Parent ]
Half right, according to this source (0.00 / 0)
...and Ike and Bonnie and Alicia. The probabilities here give a 41% chance of a direct hit by an intense hurricane in Galveston County in any 50 year period. For Cameron County, where Brownsville is, it's 52%. Orleans is 37%, though.

So it looks like you're half right, according to that source--South Texas should be further up on the list. But if a hurricane does head north, Galveston is as much a target as the points further east.

Looking at the link to the list in MisterEd's post, it seems like they may be incorporating population density into their thinking. Southern Texas is less likely to be hit by a "catastrophic" hurricane because a hurricane is more likely to come on land in a sparsely populated area there.


[ Parent ]
Links (0.00 / 0)
Nice work, Matt.

You can play with all the parameters you want here.

If I take hurricanes only (no tropical storms) within 100 nautical miles of Tampa in the months of August and September, I get 30 storms in the last 160 years.

There's a few more in September than August, but it's not dramatically different.

I'd argue that coming in with 100 nautical miles is enough to cause major disruptions of the convention--it doesn't have to actually hit in order to cause evacuations and the like (think Hurricane Rita in Houston).

In addition, this is expected to be a significantly above average hurricane season in Florida and the Gulf. There's a nice estimate of probabilities for this year here. It yields an 8% chance of hurricane-force wind gusts in Hillsborough County at some point this year, compared to the typical chance of 5%.

Put it all together and I'd estimate about a 3% chance of a hurricane causing substantial disruption to the convention--about six times higher than your estimate.

Is 3% enough to worry about? Maybe. It's certainly enough that they should have a contingency plan in place well in advance. That's particularly true because if a hurricane disrupts them and they don't have a plan, it would look awful. (And I'm not picturing a direct hit with devastating effects on the city; I'm thinking of a near miss in which they look unprepared and disorganized. The way hurricane forecasting works, it's much more likely they'll be disrupted in that way than by a direct hit.)


8% to 3%? (0.00 / 0)
A 3/8ths chance that a hurricane during the year will affect the convention? Seems high, since the high-point of the season is after the convention. But we're not that far off. Somewhere between 0.5% and 3% is probably right.

But I don't think you can have a contingency plan. At best you could delay a few days starting Thursday or Friday and finishing on Sunday, with the Democrats starting on Monday.


[ Parent ]
Plans... (0.00 / 0)
I was trying to build in some allowance for near misses that still generate evacuations and closures. But sure, I'd buy between 0.5 and 3%.

As far as a contingency plan, if a hurricane hit Tampa in the middle of the convention, clearly they'd do something--delay a few days, or make the whole thing a giant video-conference, or something. No matter how drastic, having a plan in place is a heck of a lot better than not having a plan. Just ask BP...


[ Parent ]
plans for what event? (0.00 / 0)
I think the problem is, it's so event dependent. If a category 1 is in the area and there are no evacuations, then they just wait it out, delaying as needed.

But lets say a major hurricane is headed for the area. The absolute earliest you might even start to look at it is 7 days out, when it's chugging through the Atlantic. But the cone is thousands of miles at that point. I guess my point is, by the time you realize you might have to fully cancel the convention in Tampa, the delegates and media are probably already there.

It was never clear if the Democrats had a backup for Invesco in case of a major rainstorm. If they went back to the arena, they would have had a major ticket issue. Sometimes you just have to take your chances.


[ Parent ]
the problem isnt the hurricane. of course evauation would be disruptive, (0.00 / 0)
but coming back to a city the is without traffic signals, water, sewer, electricity, and the means a/c in august would be a disaster. if the unlikely happened and a major storm came within not the general area, but the actual tampa bay area, the convention would have to be MOVED, not delayed, sometimes the power is off for weeks!!!!

also, from a political perspective, the storm would steal all the advantages of press coverage for the republicans and also probably remind lots of folks of how well the GOP did with Katrina. (by the way, how is the obama administration doing with the lower 9th ward?)


[ Parent ]
but this is very unlikely (0.00 / 0)
Much more likely is a cat 1/2 that hits nearby. Assume Tampa infrastructure is fine. Then it becomes more of a political issue when to restart.

[ Parent ]
in florida, (0.00 / 0)
our attitude is that if it is a little wind and rain, and the infrastructure is ok, everyone needs to be back at work the day after the day after the storm. if it is a nothing hurricane, then it would be at most a two day disruption, but the real problem, is as i described, the loss of power for weeks....

it may seem unlikely, but in one summer, we were without power three different times, and in only one of them was it for less than a week. seemed pretty likely in 2004-2005....


[ Parent ]
Disruprting effects (0.00 / 0)

While Matt is right that not having a storm this year does not make it more likely to have a storm the following year, the "over due" part is based on doing multi-year analysis.  While the odds of having a hurricane in 2010 is not impacted by whether there was a hurricane in 2008 or 2009, the odds of not having any hurricane over an eight-year period is lower than not having a hurricane over a four-year period. 

I would note that its not absolutely necessary that the hurricane strike in late August 2012 to disrupt the convention.  A really bad hurricane in 2011 could significantly damage the infrastructrue needed to support a convention.  It would have been difficult to hold a major convention in New Orleans the year after Katrina, especially a political convention with the overwhelming media presence.  If a major hurricane did hit Tampa in 2011, a good chunk of the stories about the convention would be comparing (favorably or unfavorably) the rebuilding of Tampa after Hurricane X to how FEMA handled New Orleans after Katrina.  If I were running FEMA, I would be thoroughly checking my plans for the Tampa area just to make sure that things are absolutely ready for the worst.



mr ed, keep in mind that a hurricane is many times more likely than a terrorist attack, (0.00 / 0)
yet, you can bet they are planning to try to stop/mitigating a terrorist attack.  

sorry, i thought mr. ed, wrote this article (0.00 / 0)
my comment should have been directed at matt!

[ Parent ]
But big difference (0.00 / 0)
terrorists know the convention is happening. The hurricane does not.  

[ Parent ]
at least we think it doesnt:) having spent nearly 30 years being chased around the state of florida by hurricanes (0.00 / 0)
it is easy to think they are smarter than we give them credit for:)

[ Parent ]
Given the amount of hot air that will come out of the convention (0.00 / 0)
it could easily strengthen a hurricane, just like the warm ocean temps.

[ Parent ]
I'm an idiot (0.00 / 0)
Just realized I completely slipped a cog. What does this hurricane season being more active than usual have to do with 2012? I guess I just can't get used to anything political getting decided two plus years in advance. :P


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