Heavy Rain in St. Johns County, Florida

Heavy Rain May 12, 2026 · St. Johns County, Florida

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

What the National Weather Service wrote

Personal Weather Station Kflsaint309 Measured A Total Rainfall Amount Of 4.69 Inches. Rain Began Around 1215 Pm. Surrounding Sites Measured 2.5-4.5 Inches Of Rainfall.

The wider storm

A stationary frontal boundary as well as both a Gulf of Mexico and Atlantic coast sea breeze combined with plentiful diurnal instability to produce robust thunderstorms across northeast FL during the afternoon and evening hours. Along with isolated severe thunderstorm activity, PWATs around 1.8 inches and slow moving/training convection resulted in very heavy rainfall and localized minor flooding.

Began near Sampson Church (30.0700, -81.5100).

Source: NOAA Storm Events Database, event 1333314. Narratives are written by the National Weather Service forecast office that issued the report.

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