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Dr. Jeff Masters sees a major hurricane risk this year

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starroute Donating Member (1000+ posts) Send PM | Profile | Ignore Sun May-16-10 01:16 AM
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Dr. Jeff Masters sees a major hurricane risk this year
http://www.wunderground.com/blog/JeffMasters/article.html?entrynum=1480

Sea Surface Temperatures (SSTs) in the Atlantic's Main Development Region for hurricanes had their warmest April on record, according to an analysis of historical SST data from the UK Hadley Center. SST data goes back to 1850, though there is much missing data before 1910 and during WWI and WWII. The area between 10°N and 20°N, between the coast of Africa and Central America (20°W - 80°W), is called the Main Development Region (MDR) because virtually all African waves originate in this region. These African waves account for 85% of all Atlantic major hurricanes and 60% of all named storms. When SSTs in the MDR are much above average during hurricane season, a very active season typically results (if there is no El Niño event present.) SSTs in the Main Development Region (10°N to 20°N and 20°W to 85°W) were an eye-opening 1.46°C above average during April. This is the third straight record warm month, and the warmest anomaly measured for any month--by a remarkable 0.2°C. The previous record warmest anomalies for the Atlantic MDR were set in June 2005 and March 2010, at 1.26°C. . . .

The high April SST anomaly does not bode well for the coming hurricane season. The three past seasons with record warm April SST anomalies all had abnormally high numbers of intense hurricanes. Past hurricane seasons that had high March SST anomalies include 1969 (0.90°C anomaly), 2005 (1.19°C anomaly), and 1958 (0.97°C anomaly). These three years had 5, 7, and 5 intense hurricanes, respectively. Just two intense hurricanes occur in an average year. The total averaged activity for the three seasons was 15 named storms, 11 hurricanes, and 6 intense hurricanes (an average hurricane season has 10, 6, and 2.) Both 1958 and 2005 saw neutral El Niño conditions, while 1969 had a weak El Niño.

The SSTs are already as warm as we normally see in July between Africa and the Caribbean, and we have a very July-like tropical wave approaching the Lesser Antilles Islands this weekend. However, wind shear is still seasonably high, and the tropical waves coming off of Africa are still too far south to have much of a chance of developing. The GFS model is indicating that shear will start to drop over the Caribbean the last week of May, so we may have to be on the watch for tropical storms forming in the Caribbean then.

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depakid Donating Member (1000+ posts) Send PM | Profile | Ignore Sun May-16-10 01:28 AM
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1. 2005 = 1.19°C anomaly, 2010 = 1.46°C anomaly
Wow.

Better hope the shear stays up.
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aquart Donating Member (1000+ posts) Send PM | Profile | Ignore Sun May-16-10 01:36 AM
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2. Would a hurricane bring the oil onto the land?
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depakid Donating Member (1000+ posts) Send PM | Profile | Ignore Sun May-16-10 01:45 AM
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3. A storm surge fom a category4 or 5 would innundate large areas along the coast
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Newest Reality Donating Member (1000+ posts) Send PM | Profile | Ignore Sun May-16-10 01:58 AM
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4. I have THE undeniable solution to your impending gusher problems!
Edited on Sun May-16-10 02:07 AM by Newest Reality
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