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Pro Update: Pattern Shift and Potential Tropical Trouble

The National Hurricane Center has raised the chance to high that a system off the Florida coast will develop into a tropical storm. According to the hurricane center, the storm has a 60% chance of becoming a tropical system in the next 48 hours, and 80% of it happening in the next 5 days. Here is the 2 PM Sunday statement:

TROPICAL WEATHER OUTLOOK...corrected
NWS NATIONAL HURRICANE CENTER MIAMI FL
200 PM EDT SUN JUN 29 2014

corrected tropical depression development status

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

1. Satellite wind data and surface observations indicate that the low
pressure system located about 230 miles east of St. Augustine,
Florida, is gradually becoming better defined as it moves slowly
southward to southwestward. Although upper-level winds are only
marginally favorable, a tropical depression is expected to form
during the next day or two. However, the system's proximity to dry
air could inhibit significant development until environmental
conditions become more conducive by late Tuesday while the low
meanders offshore of the Florida east coast.  The Air Force Reserve
reconnaissance aircraft that was scheduled to investigate the
disturbance this afternoon has been canceled, and the flight has
been rescheduled for Monday morning, if necessary.
* Formation chance through 48 hours...high...60 percent.
* Formation chance through 5 days...high...80 percent.

The storm is expected to meander offshore in a favorable environment for development over the next few days. Eventually, it may move toward the Southeast Coast and most of the computer models take it out to sea southeast of Nantucket. It definitely bears watching as it could develop into a strong tropical storm or hurricane given the lack of wind shear and warm Gulf Stream water.

Computer Model forecasts for system off Florida
Computer Model forecasts for system off Florida

The long-awaited pattern change to something more summery appears to be taking place. The upcoming week will be warm and muggy, but not incredibly hot. Highs inland will be well into the 80s. A south-southwest wind will keep it cooler near the coast. A cold front late in the week may tap into the moisture from the tropical system, and Thursday and Friday look unsettled with showers and thunderstorms. We’ll be keeping an eye on the potential tropical system for an impact, potentially only in offshore waters, next weekend.

Looking further ahead, the latest computer model runs show hot weather for the Eastern United States during the week after the 4th of July. At this point, it looks like a heat wave is possible in the first half of that week. It’s an 8-10 day forecast, so there is still plenty of time for it to change, but it finally looks like the pattern that’s dominated for the past few months will be evolving to a summer-like one.

Fred Campagna

President and Chief Meteorologist - Right Weather LLC AMS Certified Consulting Meteorologist #756 AMS Certified Broadcast Meteorologist #126

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