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Since 2012 on the now retired Weather Underground 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 at Yale Climate Connections via Disqus where the former Weather Underground community has moved to. Feel free to reply to me there, at my Disqus feed at this link, or via e-mail at 

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*******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 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 dot gov) for the latest watches/warnings and official forecasts on active tropical cyclones.**********

...FRIDAY AUGUST 20 2021 8:10 PM EDT...

Satellite image of Tropical Storm Henri taken at 2311Z:

Tropical Storm Henri has tracked further west in the short-term… which increases the storm’s potential to amplify the steering cool core upper vorticity incoming from the west as the west side of the storm will more easily be able to pull the cool air associated with the upper vorticity southward. The result is the models swing Henri more west in track around the more amplified upper vorticity for the northeast US landfall expected on Sunday. Henri is still forecast to become a hurricane before landfall.

**Due to the west shift in track… I recommend interests in southeastern New York (including the New York City metro area) and northeast New Jersey prepare for possible tropical Storm to Hurricane force conditions. In addition to the wind… coastal storm surge is a concern.

** Interests in Massachusetts… Rhode Island… southern Vermont.. southern New Hampshire… Connecticut… and Long Island New York should also continue preparing for possible tropical Storm to Hurricane force conditions.

For more info on Henri… see post #85 available on the home page of this site

For more info on Grace… see posts #85B and #85 on the home page of this site

For more info on the rest of the Atlantic tropics… see post #85 available on the home page of this site.

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