National Weather Service Miami South Florida Rain Chances
MIAMI, Florida – An atmospheric river will bring heavy rainfall, thunderstorms, and a heightened risk of flooding across South Florida from Monday morning through Tuesday, according to the National Weather Service (NWS) in Miami.
A Flood Watch is in effect for all of South Florida from Monday, May 12, at 8 AM through Tuesday, May 13, at 8 AM. The NWS warns of a slight risk (>15%) of excessive rainfall, which could lead to flooding in rivers, creeks, low-lying areas, and urban zones with poor drainage.
Rainfall totals are expected to range from 3 to 6 inches across the region, with isolated areas potentially seeing 6 to 8 inches or more.
Monday will be the most intense day, with the NWS forecasting a slight risk (at least 15%) of excessive rainfall and widespread flooding across the region. A marginal risk (1/5) of strong to severe thunderstorms will also persist, bringing strong winds (40 mph or higher), heavy rainfall, and lightning.
Rainfall accumulation could reach 3 to 6 inches in many areas, with isolated spots potentially seeing higher amounts. The heaviest rainfall and flooding risks are expected in the eastern metro areas, including Miami and Fort Lauderdale.
By Tuesday, the weather system will begin to weaken, but scattered to numerous showers and thunderstorms will continue into mid-day, particularly along the east coast.
Rainfall is expected to taper off, with accumulations of 1 to 3 inches. However, the risk of localized flooding will persist due to saturated ground from the previous days’ rainfall. The best chance for heavy rain on Tuesday will be in the eastern metro areas.
In addition to the rainfall and flooding risks, the NWS has issued a high-risk warning for rip currents along the beaches of Palm Beach, Broward, and Miami-Dade Counties. Beachgoers are urged to exercise caution and avoid swimming in these areas during this period.
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