Simultaneous Cat 4's
Posted by 1969 on 9/15/2010, 7:16 am
Remarkable!

UPDATE 5 AM AST: Second time in 100-years two coincident Category 4s in the Atlantictogether, Igor and Julia have the highest coincident intensities on record.

Two major hurricanes exist simultaneously in the North Atlantic, a rare occurrence.  With the current intensities of Julia and Igor, this has only happened 3-times in the past 60-years:  1950 [Dog & Easy], 1958 [Helene & Ilsa], and 1999 [Floyd & Gert].  But Igor and Julia just are not major hurricanes, they are Category 4s.



   * Unprecedented:  in our North Atlantic historical records, the forecast intensities of Igor and Julia during the next 12-24 hours will be unprecedented for coincident storms.  The only other time (we know of) coincident Category 4+ hurricanes occurred was in 1926 with Hurricane #4 and the Great Miami Hurricane (September 26 at 06:00 UTC).

   * More:  At 115 knots +, Hurricane Julia is the most intense storm that far in the Eastern Atlantic [-31.8W] joining other major hurricane east of -35W including Frances 1980 and Fred 2009.

   * Early morning September 15: 12-hour forecasts indicate a maximum intensity of 120 knots for Julia and 130 knots for Igor. Two coincident Category 4 hurricanes have not occurred since 1950.  The only occurrence since 1900 happened on September 15, 1926 at 06Z with Hurricane 4 [115 knots] and the Great Miami Hurricane [120 knots].

   * Thus, Igor and Julia will attain have attained coincident intensities that are unprecedented:  Igor:  130 knots & Julia: 115 knots.


http://www.prisonplanet.com/hurricane-julia-explodes-%E2%80%94-atlantic-has-two-coincident-category-4-hurricanes-very-rare.html
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Simultaneous Cat 4's - 1969, 9/15/2010, 7:16 am
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