Track guidance is in good agreement on a path toward the Azores in about 6 days, perhaps as a hurricane, perhaps as a tropical storm, or perhaps as a potent extratropical storm (somewhere in the 50-70kt ballpark by the time it reaches the islands). The NHC 5-day forecast is shown by the thick green line, while various models are shown by the thin multi-colored lines. The Azores islands are labeled for reference.
The big NASA field program, HS3, is sending the Global Hawk unmanned aircraft to survey Nadine today, releasing 69 dropsondes in a 15x15 degree "lawnmower pattern" around the storm to get a detailed picture of the near-storm environment. The state-of-the-art plane took off from Wallops at 10:00am EDT this morning, and will fly over Nadine until tomorrow morning at 6:15am.
The ACE (Accumulated Cyclone Energy) stands at 80.6 as of this morning, which is about 139% of what an average season would be at on this date. This time of year, every day without a hurricane (or multiple hurricanes for that matter) lets 2012's ACE loose ground against the average because climatologically, ACE racks up real fast in mid-September. We're very close to the ACE we had in 2010 and 2011 on this date.
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