Current projections bring Isaac, now a strengthening tropical storm, to Florida's neighborhood during the first part of next week.
The latest forecast path map. A larger version of this map can be found on the AccuWeather Hurricane Center.
As we have said early on, steering currents will direct Isaac along a general curved path around high pressure over the Atlantic.
Impacts from Isaac in Florida will depend on the strength, size and track of the system and will range from sunny, breezy and hot conditions to Category 1 or 2 hurricane effects.
For planning purposes, if the peninsula remains in the middle of current AccuWeather.com Hurricane Center window of movement projections, conditions will deteriorate with increasing thunderstorms, gusts winds, heavy rain and building seas from south to north Sunday night to Tuesday.
Such a path will bring the risk of travel problems, downed trees, power outages, property damage, street flooding, storm surge and beach erosion.
Exactly when Isaac begins a more aggressive northward curve, near the disruptive mountains of the Greater Antilles (Puerto Rico, Hispaniola and Cuba), will determine if the storm tracks directly over Florida, Atlantic waters east of Florida or the Gulf of Mexico.
At this time, all are on the table, until we see a definitive northwest turn.
Climatologically, systems coming from this direction in the Caribbean tend to steer toward either side of the Florida Peninsula.
"Meteorological issues are the strength and size of Isaac, the strength and shape of the Atlantic high, a trough of low pressure in the eastern-central United States, wind shear and warm waters," according to Dan Kottlowski, head of the AccuWeather.com Hurricane Center. "At present, Isaac is in a very favorable zone for intensification with low wind shear and minimal dry air. It is heading into increasingly warmer waters."
A large Category 1 or 2 hurricane will have more impact than a minimal tropical storm on Florida or other areas in terms of wind, rain and surf.
North of the Great Antilles, the water is very warm around the Florida Straits, but wind shear will increase north of this area.
Prior to reaching Florida waters and impacting the peninsula of the Sunshine State, Isaac will batter the northern Caribbean islands from the Leewards to the Virgin Islands, Puerto Rico, Hispaniola and Cuba spanning this week. During this time, Isaac will fluctuate in strength ranging between a tropical storm and a Category 1 or 2 hurricane.
"Unlike other systems that have cruised the Caribbean, this system is not likely to struggle with dry air or plow due westward to Central America," Kottlowski said. "It is a concern for Florida, part of the Atlantic Seaboard and the eastern and central Gulf area next week."
An unusually strong push of cool air for early September will move southward along the Atlantic Seaboard into the Labor Day weekend, before July-like heat returns by next week.
While lulls in tropical activity in the Atlantic will continue, a rapid end to the hurricane season in September does not always occur during an El Nino.
After heat has dominated headlines this summer, cool air has finally taken control of the northern half of Europe with no signs of departing anytime soon.
Steering winds could take Ignacio, as a remnant storm, into the southeastern arm of Alaska or British Columbia during the middle days of next week.
While Tropical Storm Kevin will stay well away from Mexico, its moisture will still lead to an increase in showers and thunderstorms from Baja California to the Four Corners region of the United States.
A stormy weather pattern will prevail through September across much of southern South America.
Long Island NY (1821)
Long Island hurricane of 1821 struck western Long Island. The storm affected a densely populated area where weather observers were common.
Tampa, FL (1935)
The "Labor Day" hurricane hit Tampa, killing 400 people. Earlier, this intense storm had a center barometric pressure of 26.35 inches - the lowest recorded sea level pressure in the Western Hemisphere.
Denver, CO (1961)
Earliest snow on record; a total of 4.2 inches. A great storm raged at high elevations with 2-3 feet of snow closing roads on Labor Day weekend.