The Atlantic hurricane season of 2010 has been a very active season so far (as of mid September 2010); however, none of the most violent storms have affected land. The above-normal sea surface temperature anomaly in the far eastern Atlantic is producing more hurricanes, but fortunately the development so-far-out east is actually causing the Eastern US to be spared, with hurricane Earl being the closest shave of one of these missing-the-US storms.
In the image above, two powerful hurricanes (Igor and Julia) are raging in the far tropical Atlantic, far from any land. The image to the right is a close-up of the eye of Hurricane Igor at maximum intensity on September 13. None of these storms were affecting anyone at this time; with fish, birds, and whales most likely the only "beings" experiencing the fury of these hurricanes! Even ships do not travel through that part of the ocean very often.
During the Cape Verde season (September), tropical waves normally move off Africa and do not develop into a close circulation until making their way across the ocean (near the Windward Islands). An "open" tropical wave, like a wave in a river going across the current, can propagate THROUGH a trough / weakness in the steering flow (still move WEST although the trade wind flow is SE). Tropical cyclones that develop RIGHT OFF the African coast, often gain latitude (they do NOT move due WEST, but more WNW). This is because a CLOSED low always moves with the flow it’s embedded in (if the trade winds are SE nearing a trough, the low moves NW, not WEST like an "open" tropical wave would).
By the time these systems reach the western Atlantic (near longitude 60 to 65 west or so), they have already missed the northern Antilles / Puerto Rico, and are more susceptible to be picked up by a stronger trough and re-curve into the westerlies and into the North Atlantic. Sometimes the tiny island of Bermuda is affected by these, but a DIRECT hit there is rare.
You can also check my area on tropical weather and any associated activity / chase plans by clicking the link for that area on my web site provided below.
http://www.sky-chaser.com/tropics.htm
