Hurrican Shutters

Installing "Peace of Mind"

Heart of the Hurricane Season 2012

Posted by cat5shuttersllc on August 6, 2012

Heart of the Hurricane Season 2012Crunch Time in the Atlantic Basin

Every season has its peak.

For instance, all 162 games “count” in Major League Baseball’s six-month regular season. However, September games tend to take on greater importance, as teams stretch to reach the post-season.
Similarly, the Atlantic hurricane season “officially” kicks off in June. Certainly the first two months of the season can generate their share of tropical cyclones, some with significant impacts. However when it comes to the most impactful tropical cyclones, there’s a clear peak to the season.

Breaking Down the Stats

If there is one reason to pay attention during this “prime time” of the season, consider 93% of major hurricanes (Category 3 or stronger on the Saffir-Simpson hurricane wind scale), those responsible for the most destruction in any hurricane season, occur from August through October.

Of the top 10 costliest hurricanes on record in the U.S., 9 of those have occurred from August through October, including Irene (late August 2011), Andrew (late August 1992), Ike (mid-September 2008) and, of course, Katrina (late August 2005).

More Real Estate Open

Simply put, atmospheric conditions are more favorable over a much larger expanse of the Atlantic Basin in the peak months of August – October than early or late in the season.

In June, the tropical cyclone formation zones are confined to the Gulf of Mexico, western Caribbean Sea, or just off the Southeast U.S. coast. This is one reason for the relative lack of early-season hurricanes compared to August through October. Storms that form in these areas early in the season don’t have far to go before reaching land.

From July into August, the formation zone gradually spreads east until the so-called “main development region”, from the Lesser Antilles to just off Africa, is in play. This opens up the potential for “Cape Verde” hurricanes to make the 3500+ mile trek from the eastern Atlantic Ocean toward the Caribbean islands or U.S. coast.

Factors: Accentuating Positives, Diminishing Negatives

Several factors play into opening up more of the Atlantic Basin to tropical cyclone formation in the peak months of August, September and October.

First, disturbances called “tropical easterly waves” moving off Africa become more vigorous and well-defined. These are the seedlings responsible for a large majority of all major hurricanes in the Atlantic Basin.

These waves wouldn’t have a chance to develop if they are sheared apart. During the peak of the season, wind shear, or the change in wind speed and direction with height, diminishes in the “main development region” (MDR) mentioned earlier (Lesser Antilles to off the African coast). This adds the MDR to areas of weaker shear in the Gulf of Mexico and western Caribbean Sea from early in the season.

Finally, sea-surface temperatures in the tropics tend to be at their warmest in September, as they have spent the entire summer soaking up the sun’s energy.

Distributed by Viestly

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

 
%d bloggers like this: