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Flash Flood · Puerto Rico
Flash Flood October 31, 2024 · Humacao, Puerto Rico
Where the report was made, with tornadoes recorded within 15 miles over the years.
What the National Weather Service wrote
Emergency managers reported flash flooding (urban) affecting portions of Calle Dufresne and Calle Antonio Lopez, near the Obelisk in tribute to the Humacao Teachers and the Municipal Police offices. These same flood waters affected a nearby elementary school. These roads were impassable.
The wider storm
A series of cold fronts and a polar trough increased moisture and instability across the region for the last three days of October. Moisture levels went well above the climatological value, leading to a significant increase in showers and thunderstorms. Showers were very numerous, with rainfall accumulations surpassing 8 inches in sectors of northeastern and southeastern Puerto Rico. Soils were saturated, and rivers were running very high, triggering the issuance of a Flood Watch. With the excessive rainfall, multiple flash flooding events and mudslides unfolded.
Began near Humacao (18.1500, -65.8200).
Source: NOAA Storm Events Database, event 1216882. Narratives are written by the National Weather Service forecast office that issued the report.
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