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CoconutCandy
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Loc: Beautiful Honolulu Hawaii
Hurricane CALVIN Peaking as Minimal Cat 1 Hurricane
      Fri Jul 08 2011 07:41 PM

As anticipated by the NHC and other guidance, 'Calvin' appears to be peaking this afternoon as a minimal Cat 1 hurricane, with peak sustained winds estimated to be near 75 mph.

Further inner core organization has transpired since this morning, depicting somewhat more robust appearing eyewall dynamics, with a robust cluster of thunderstorms with cloud tops of -80 degrees C or colder, but an overall decrease in associated banding features surrounding the storm could portend the harbinger of a slow but steady weakening trend expected beginning the next 12 to 18 or so hours.



The latest discussion from the NHC is revealing ...

"... CONVENTIONAL SATELLITE IMAGES AS WELL AS MICROWAVE DATA HAVE BEEN SHOWING AN INTERMITTENT EYE FEATURE.

BASED ON THE CURRENT CLOUD PATTERN AND THE INCREASE IN THE DVORAK T-NUMBERS SINCE THIS MORNING ... CALVIN HAS BEEN UPGRADED TO HURRICANE STATUS WITH AN INITIAL INTENSITY OF 65 KNOTS."

However, as mentioned above, 'Calvin' is expected to be a short lived system ...

"THE WESTERN PORTION OF THE CIRCULATION IS ALREADY OVER COOLER WATER WHERE THE CONVECTION HAS BEGUN TO WEAKEN. IT APPEARS THAT CALVIN HAS REACHED ITS PEAK INTENSITY ... THE GENERAL TREND IS FOR CALVIN TO WEAKEN."

It will be interesting to see if tonight's approaching diurnal convective max will at least partially compensate for the cyclone slowly edging towards substantially cooler waters and entraining a rather stable appearing cloud field along it's western periphery, and maintain it's identity as a minimal hurricane for another advisory cycle, or whether the diminutive forces will prevail and the expected weakening back to tropical storm transpire.

Another '"Ho Hum" Hurricane in another "Ho Hum" Basin. But keep in mind that the Eastern Pacific Basin is thee *2nd Most Active*, globally speaking, (after the Western Pacific!) and plays an essential role in the global transport of heat from the tropics each and every hurricane season.

Good ol' EastPac Hurricanes. We couldn't do without 'em!

..

Edited by CoconutCandy (Fri Jul 08 2011 08:21 PM)

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* Tropical Storm CALVIN Nearing Hurricane Strength CoconutCandy Fri Jul 08 2011 07:41 PM
. * * Hurricane CALVIN Peaking as Minimal Cat 1 Hurricane CoconutCandy   Fri Jul 08 2011 07:41 PM

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