A very slow-moving disturbance, associated in part with the remnants of Isaac, will drift over the north-central Gulf of Mexico and could bring more flooding problems to coastal areas.
Very humid air, combined with the disturbance will unleash downpours and the potential for flash flooding from part of the Louisiana coast to the Florida Panhandle.
Since strong wind shear will increase over the Gulf this weekend, the feature is unlikely to have enough time to develop a strong, low-level circulation. However, a weak system, such as a tropical depression or storm could come about.
Alicia formed from a complex of thunderstorms moving southward over the Gulf of Mexico in 1983. If such a system were to develop and be named, it would "not" gather the name Isaac.
Moisture regenerated from new system could then be drawn up along the Atlantic Seaboard or dragged across the Florida Peninsula over the weekend, enhancing downpours once again.
It appears that the remnants Isaac has split into two parts with one feature over the eastern Great Lakes and the other along the central Gulf coast Tuesday evening.
There is a continued risk of flash flooding from the lingering tropical downpours and any extra enhancement this disturbance provides through the weekend.
During the 24-hour period ending at 1:00 p.m. CDT Wednesday, Mobile, Ala. received 3.60 inches of rain. Pascagoula, Miss. picked up 3.05 inches during the same period as the system drifted slowly southward.
Several inches to a half a foot of additional rain could fall from a slow-moving, weak tropical system anywhere along the central and eastern Gulf Coast area through the weekend.
Cooler, less humid air gathering momentum over Canada is forecast to sweep across Texas this weekend. That air could reach the central Gulf Coast area by early next week providing relief for those sweltering in heat and humidity and dodging downpours in the wake of Hurricane Isaac.
Bone-chilling air, rain and even some snow will impact the Great Lakes and Northeast this Halloween, while warmth prevails in the Southwest.
A rain-free weekend is in store for the New York City area, ahead of a surge of warmth for the middle part of next week.
Tropical Cyclone Nilofar could threaten areas from the southern Arabian Peninsula to northwestern India next week.
Rain will continue to fall and heighten concerns for flooding across southeastern Europe into Sunday.
Heat building across central South America this weekend will set the stage for adverse weather next week.
After many locations over the Plains feel like late summer this weekend, the record-challenging warmth will expand to the Northeast next week.
Tampa, FL (1921)
Hurricane "most destructive/highest tide," pressure 28.81"/975.6 mb, winds 100 mph, tide 10.5 feet, six dead and $3 million damage.
Strong coastal storm with winds exceeding 100 mph over the ocean; 82-mph wind gust at south end of Chesapeake Bay Bridge Tunnel. Bethany Beach Delaware being evacuated as waves came over the dunes. Heavy snow in NC mountains. Mt. Pisgah - 11 inches; Mt. Mitchell - 6 inches.
Caribou, ME (1990)
19 consecutive days of measurable precipitation.