Flash Flood in Nassau County, New York

Flash Flood January 9, 2024 – January 10, 2024 · Nassau County, New York

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

Flower Road near Forest Road Elementary school closed due to flooding.

The wider storm

A large low pressure system impacted the area late on January 9th and into the 10th with long duration persistent moderate to heavy rainfall. In addition to widespread river flooding, some localized areas of flash flooding occurred as the heaviest rainfall associated with convection moved through. Precipitable water values of 1.2-1.4 inches were record levels for early January. The anomalous moisture and heavy rainfall resulted in a widespread 2 - 4 inches of rainfall, much of it occurring over a several hour timeframe before the cold frontal passage.

Began near Valley Stream (40.6600, -73.7100).

Source: NOAA Storm Events Database, event 1154983. Narratives are written by the National Weather Service forecast office that issued the report.

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