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Tropical Cyclones 2012


Harbourton

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It is interesting that early season cyclone predictions for the Atlantic Basin were basically normal to below activity due to an increasing El Nino that would keep the numbers down. NOAA did revise their forecast on AUGUST 9 based SSTs and the 20 year increased activity cycle. I'm beginning to think that the transitional stages of the ENSO in the right season are more important.JMO

NOAA raises hurricane season prediction despite expected El Niño

Updated outlook calls for near- or above-normal Atlantic season

August 9, 2012

hurricaneernesto_300.jpg

Satellite image of Hurricane Ernesto taken on Aug. 7, 2012.

(Credit: NOAA)

This year’s Atlantic hurricane season got off to a busy start, with 6 named storms to date, and may have a busy second half, according to the updated hurricane season outlook issued today by NOAA’s Climate Prediction Center, a division of the National Weather Service. The updated outlook still indicates a 50 percent chance of a near-normal season, but increases the chance of an above-normal season to 35 percent and decreases the chance of a below-normal season to only 15 percent from the initial outlook issued in May.

Across the entire Atlantic Basin for the season – June 1 to November 30 – NOAA’s updated seasonal outlook projects a total (which includes the activity-to-date of tropical storms Alberto, Beryl, Debbie, Florence and hurricanes Chris and Ernesto) of:

  • 12 to 17 named storms (top winds of 39 mph or higher), including:
  • 5 to 8 hurricanes (top winds of 74 mph or higher), of which:
  • 2 to 3 could be major hurricanes (Category 3, 4 or 5; winds of at least 111 mph)

The numbers are higher from the initial outlook in May, which called for 9-15 named storms, 4-8 hurricanes and 1-3 major hurricanes. Based on a 30-year average, a normal Atlantic hurricane season produces 12 named storms, six hurricanes, and three major hurricanes.

“We are increasing the likelihood of an above-normal season because storm-conducive wind patterns and warmer-than-normal sea surface temperatures are now in place in the Atlantic,” said Gerry Bell, Ph.D., lead seasonal hurricane forecaster at the Climate Prediction Center. “These conditions are linked to the ongoing high activity era for Atlantic hurricanes that began in 1995. Also, strong early-season activity is generally indicative of a more active season.”

However, NOAA seasonal climate forecasters also announced today that El Niño will likely develop in August or September.

“El Niño is a competing factor, because it strengthens the vertical wind shear over the Atlantic, which suppresses storm development. However, we don’t expect El Niño’s influence until later in the season,” Bell said.

“We have a long way to go until the end of the season, and we shouldn’t let our guard down,” said Laura Furgione, acting director of NOAA’s National Weather Service. “Hurricanes often bring dangerous inland flooding as we saw a year ago in the Northeast with Hurricane Irene and Tropical Storm Lee. Even people who live hundreds of miles from the coast need to remain vigilant through the remainder of the season.”

“It is never too early to prepare for a hurricane,” said Tim Manning, FEMA’s deputy administrator for protection and national preparedness. “We are in the middle of hurricane season and now is the time to get ready. There are easy steps you can take to get yourself and your family prepared. Visit www.ready.gov to learn more.”

NOAA’s mission is to understand and predict changes in the Earth's environment, from the depths of the ocean to the surface of the sun, and to conserve and manage our coastal and marine resources. Join us onFacebook, Twitter and our other social media channels.

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Well the 6z GFS makes Leslie interesting... Still think this could come further west than Burmuda. Just something to keep an eye on. If leslie can stay weaker, longer, than it's viable. Not convinced yet, but keep an eye on it. Models have been too far east in the long term with some TC's this year.

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Well the 6z GFS makes Leslie interesting... Still think this could come further west than Burmuda. Just something to keep an eye on. If leslie can stay weaker, longer, than it's viable. Not convinced yet, but keep an eye on it. Models have been too far east in the long term with some TC's this year.

Yes, that run def raised an eyebrow this morning. I was never really convinced it would fish as early as the models had been showing in the long range. Something to track for a few days at least...

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Yes, that run def raised an eyebrow this morning. I was never really convinced it would fish as early as the models had been showing in the long range. Something to track for a few days at least...

The problem is with leslie unlike issace, their is no WAR. Issac had expansive ridging to its north. While leslie has trofs after trofs coming off the east seaboard

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So Adam, is the soon-to-become TD in the Central Atlantic something that we could at least theoretically watch for a potential US landfall or is it almost certainly a fish storm? For some folks, it doesn't matter if it will only be a fish storm. For other folks, it's interesting to watch these things form and intensify, but it's way more relevant (and way more interesting) to consider a potential US landfall.

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So Adam, is the soon-to-become TD in the Central Atlantic something that we could at least theoretically watch for a potential US landfall or is it almost certainly a fish storm? For some folks, it doesn't matter if it will only be a fish storm. For other folks, it's interesting to watch these things form and intensify, but it's way more relevant (and way more interesting) to consider a potential US landfall.

1590.jpg

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