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Aussie (& S-Hemisphere) Cyclone Action 2012-2013


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You mean Sandra.   :D

 

It still looks pretty decent in the last frame-- there's still a clear center.

From Oz Cyclone Chasers FB post...

 

 

   

 

A very strange scenario developing with Tropical Cyclone Sandra with the Bureau Of Meteorology continuing to issue Tropical Cyclone Advices for the system despite the fact that as the system re-intensifies it is expected to do so via extra tropical methods (baroclinic instability) and not tropical methods. Fascinating stuff.... If you recall Hurricane Sandy in the USA did something similar and created a lot of controversy as the public demanded Tropical Cyclone (hurricane) warnings for the system, yet the system was not classified as tropical upon landfall.

The end result is the same folks Tropical or non-tropical, residents of Lord Howe Island need to prepare for some potentially extreme weather conditions. It will be interesting to see what the models show with this system later this evening.

Sandy in America and Sandra in Australia, similar systems in more than just name - surely it's a gee up :P

 

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A low moved across the Gulf of Carpentaria and Cape York Peninsula, and now it's become Cyclone Tim over the Coral Sea.  The JTWC and BoM both have it strengthening first, then weakening in a few days as it boomerangs back toward the Queensland coast near Mackay in hostile conditions. Something to watch.

 

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Mildly interesting.

 

2. SOUTH PACIFIC AREA (WEST COAST OF SOUTH AMERICA TO 135 EAST):
   A. TROPICAL CYCLONE SUMMARY: NONE.
   B. TROPICAL DISTURBANCE SUMMARY:
      (1) THE AREA OF CONVECTION PREVIOUSLY LOCATED NEAR 10.7S
155.1E, IS NOW LOCATED NEAR 12.0S 154.2E, APPROXIMATELY 510 NM
EAST-SOUTHEAST OF PORT MORESBY, PAPUA NEW GUINEA. RECENT ANIMATED
MULTISPECTRAL SATELLITE IMAGERY SHOWS SPORADIC DEEP CONVECTION
DEVELOPING AROUND A SLOWLY DEVELOPING LOW LEVEL CIRCULATION CENTER
(LLCC) ALSO EVIDENT IN A 272233Z ASCAT IMAGE. THIS DISTURBANCE LIES
SOUTHWEST OF AN UPPER-LEVEL ANTICYCLONE CENTER IN AN AREA OF MODERATE
NORTHEASTERLY VERTICAL WIND SHEAR AND FAVORABLE WESTWARD AND POLEWARD
OUTFLOW ALOFT. VERTICAL WIND SHEAR IS EXPECTED TO INCREASE AS THE
SYSTEM MOVES GENERALLY WESTWARD OVER THE NEXT FEW DAYS. SEA SURFACE
TEMPERATURES REMAIN FAVORABLE FOR DEVELOPMENT, RANGING FROM 29 TO 30
DEGREES CELSIUS. BASED ON THE AFOREMENTIONED ASCAT PASS, MAXIMUM
SUSTAINED SURFACE WINDS ARE ESTIMATED AT 25 TO 30 KNOTS. MINIMUM SEA
LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1005 MB. ALTHOUGH
ENVIRONMENTAL CONDITIONS REMAIN MARGINALLY FAVORABLE FOR DEVELOPMENT,
BASED ON THE SLOWLY ORGANIZING LOW-LEVEL CIRCULATION AND EXPECTATIONS
OF LESS FAVORABLE UPPER-LEVEL CONDITIONS, THE POTENTIAL FOR THE
DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24
HOURS REMAINS MEDIUM.

 

 

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