It would take a "perfect storm" sort of conditions to all fall in place to bring TD 9 to the doorstep of Tampa as a hurricane during the convention, but that is one of the possibilities the models have been suggesting could happen. Join the New Times community and help support independent local journalism in Miami.
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Tim Elfrink is a former investigative reporter and managing editor for Miami New Times. Contact: Tim Elfrink. Follow: Twitter: timelfrinkmia. Don't Miss Out. Join Today. Sign Up. I Support Learn More. Latest Stories. Injustice for Ollie? By Michael Majchrowicz Nov 11, More ». Isaac began as a tropical depression east of the Lesser Antilles on the morning of August 21, , reaching tropical storm strength later that afternoon. The center of Tropical Storm Isaac passed over western sections of Hispaniola and eastern Cuba on Friday night, August 24th and Saturday, August 25th as it moved northwest.
Isaac then moved west-northwest through the Straits of Florida on Sunday, August 26th, with the center passing across the lower Keys late that afternoon. Isaac continued on a west-northwest track over the southeast Gulf of Mexico Sunday through Monday, August 27th. Initial forecasts from the National Hurricane Center showed Isaac potentially making a direct hit on mainland south Florida, with subsequent forecasts shifting the track slightly to the south. This resulted in the main impacts being from the rain bands which extended well away from the center as well as storm surge.
A Flood Watch was issued at AM Sunday, August 26th for all of mainland south Florida due to the potential for significant flooding. As the center of Isaac passed by the lower Keys late Sunday afternoon, a series of heavy rain bands formed over the Atlantic and began to move onshore southeast Florida Sunday evening. The bands of heavy rains and squalls continued through the night and into early Monday morning. The heaviest of the rain bands concentrated over Palm Beach and Broward counties, producing between 10 and 13 inches of rain mainly west of the Florida Turnpike from The Acreage south to northern metro Broward County.
Other rain bands developed during the day on Monday over the same area in eastern Palm Beach County that received the heavy rainfall Sunday night Figure 1. Rainfall amounts from this rainband yielded an additional one to three inches.
Maximum rain amounts were both measured and estimated in the 15 to 20 inches range across the Wellington and The Acerage communities Figure 3. These rains led to severe flooding, with the western communities of metro Palm Beach County hardest hit.
Several homes were flooded and many streets were left impassable Figures 4, 5, and 6. Neighborhoods were stranded by several feet of water as a result of excessive rainfall overtopping canals. The following table contains the top 10 rainfall reports across south Florida from Isaac:. Another primary concern from Isaac was the potential for significant storm tide and coastal flooding.
The eventual track of Isaac lessened the impact for southwest Florida; nevertheless coastal flooding was observed along the coast of Collier County. After an especially low tide from strong winds pushing water away from the coast Sunday afternoon, southerly winds on the back side of Isaac pushed water rapidly back toward the coast on Monday.
By the time of high tide around midday on Monday, tides had risen as much as six feet from the previous day's low tide. Up to three feet of tidal inundation occurred along the Collier County coast from Everglades City to Chokoloskee, flooding roads and leaving people stranded Figures 7 and 8.
Although flooding was the main story that resulted from Tropical Storm Isaac's track near south Florida, many areas experienced high winds as well.
The following table contains peak wind gusts across south Florida from Isaac:. These winds were responsible for downing many trees and power lines. An estimated , residents lost power across southeast Florida. Evacuation orders were issued for mobile home residents in Miami-Dade County. The Port of Miami and all bridges were also closed during the peak of the storm. Collier County fared better with only an estimated 1, residents losing power. Fortunately, very few cases of structural damage to homes were noted.
From the initial issuance of tropical storm watches for all of mainland South Florida Friday evening, August 24th, flooding was emphasized as a primary concern. Click the image to view a larger version of the animation. Figure 2: hour total rainfall accumulation map from Tropical Storm Isaac.
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