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). 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. 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. The eventual track of Isaac lessened the impact for southwest Florida nevertheless coastal flooding was observed along the coast of Collier County. The following table contains the top 10 rainfall reports across south Florida from Isaac:Īnother primary concern from Isaac was the potential for significant storm tide and coastal flooding. Damage was estimated at over $8 million directly related to the flooding. Neighborhoods were stranded by several feet of water as a result of excessive rainfall overtopping canals. Several homes were flooded and many streets were left impassable (Figures 4, 5, and 6). These rains led to severe flooding, with the western communities of metro Palm Beach County hardest hit. Maximum rain amounts were both measured and estimated in the 15 to 20 inches range across the Wellington and The Acerage communities (Figure 3). The final result was an area of 10+ inches of rain across roughly one-third of Palm Beach County stretching from Jupiter Farms south to Boca Raton, then into northern metro Browad County from Coral Springs to Lauderhil. Rainfall amounts from this rainband yielded an additional one to three inches. 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). 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. The bands of heavy rains and squalls continued through the night and into early Monday morning. 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. This resulted in the main impacts being from the rain bands which extended well away from the center as well as storm surge.Ī Flood Watch was issued at 459 AM Sunday, August 26th for all of mainland south Florida due to the potential for significant flooding. 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. 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. Isaac moved west across the Lesser Antilles on August 22nd and into the eastern Caribbean Sea where it passed south of Puerto Rico. Isaac began as a tropical depression east of the Lesser Antilles on the morning of August 21, 2012, reaching tropical storm strength later that afternoon.
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