Flash Flood · Puerto Rico

Flash Flood November 27, 2009 · Hatillo, Puerto Rico

$150K

Damage as recorded

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

What the National Weather Service wrote

Intense rainfall led to serious but localized urban flooding at Parcelas Roberto Clemente II, located between the Pajuil and Campo Alegre neighborhoods of Hatillo. Around 28 families sustained major property damage as mud laden runoff waters flooded their homes.

The wider storm

The combination of sea breeze convergence, intense heating, orographic lifting and upper level jet dynamics allowed for localized slow moving intense thunderstorm cells over Hatillo and Arecibo during the early evening. Localized but heavy very rainfall produced flash flooding. Doppler radar estimated rainfall amounts of 6-8 inches for the 24 hour period ending at midnight. The nearest USGS rain gauge at Rio Camuy near Bayaney recorded 3.21 inches from 1635-2100 AST.

Began near Hatillo (18.4324, -66.7934).

Source: NOAA Storm Events Database, event 203299. Narratives are written by the National Weather Service forecast office that issued the report.

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