BIRDSEYE VIEW POSTS

Since 2012 on the Weather Underground (www.wunderground.com) blogs, I have been posting annotated "birdseye view" charts of the Atlantic basin, with a detailed explanation and forecasting that references the chart. From there you may know me as "NCHurricane2009." While I now do these "birdseye view" posts here, I will continue to do comments via Disqus on Weather Underground at www.wunderground.com/cat6. You can see my Disqus feed at this link for my latest comments. Feel free to reply to me with your disqus account or e-mail at IOHurricanes@outlook.com 

 
 
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MY 2021 ATLANTIC HURRICANE SEASON BIRDSEYE VIEW POST #6A (Special Update)

*******Note that forecasts and outlooks in this post are NOT the official forecast from the National Hurricane Center (NHC). They are my own detailed views on the Atlantic tropics based on current observations and latest computer model runs. As such do not make decisions based on my posts...consult news media...watches and warnings from your local weather office...and any evacuation orders issued by local governments to make the most informed and best decisions. Visit the NHC website hurricanes.gov (hurricanes dot gov) for the latest watches/warnings and official forecasts on active tropical cyclones.**********


...MONDAY MAY 31 2021 8:30 PM EDT...

The south end of the upper trough that was offshore of the northwestern US a week ago is...as forecasted earlier in birdseye view post #6...becoming cut-off into a western Atlantic upper vortex located offshore of south Florida due to the strength of the current central and eastern US deep-layer ridge. The eastern divergence zone of the upper vortex is producing thunderstorms over Cuba...the western Bahamas...and adjacent waters. At the surface is the tail end of the cold front associated with the upper trough...with no current signs of an organized spin on ASCAT passes of surface wind.


As we kick off the official start of the Atlantic hurricane season in the next 24 hours...will be monitoring this area to see if an organized surface tropical feature emerges with the support of the upper vortex’s peripheral divergence. Currently none of the computer models shows this. If anything forms in the short-term...it would be guided more west toward the Florida peninsula as the surface layer of the eastern US deep-layer ridge is bridging with the Atlantic subtropical surface ridge. Anything that forms toward 72 hours will be guided more northwest toward the southeastern US coastline as the eastern US deep-layer ridge becomes eroded by the current western/central US upper trough.

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