Barometric Pressure Forecast for Palm Valley, Florida
Barometric pressure forecast for Palm Valley, Florida — between the Intracoastal Waterway and the Atlantic in St. Johns County, south of Jacksonville Beach. See current barometric pressure and what it means for weather-sensitive people.
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Pressure and weather in Palm Valley
Palm Valley occupies a narrow strip of barrier island backcountry between the Tolomato River reach of the Intracoastal Waterway and the Atlantic beaches, ten to twenty feet above sea level. The sea breeze runs its weather for most of the year. From May through September the land heats faster than the ocean, a breeze pushes inland through the late morning, and where it collides with the breeze coming east off the Gulf coast, usually over the interior of the peninsula in the afternoon, thunderstorms fire. Near the coast that means bright mornings and a daily chance of a short intense storm from mid-afternoon onward, with the barometer showing little beyond the twice-daily tidal rise and fall that is far more visible in the subtropics than anywhere farther north. The exception is hurricane season. This stretch of northeast Florida has more often taken the outer edge of systems paralleling the shore than a direct landfall, which still produces days of onshore wind, serious beach erosion, and a broad slow fall of fifteen to twenty-five hPa. Winter supplies the year's only sharp frontal passages, when a front sweeps down the peninsula, swings the wind northwest inside an hour and strips the humidity out of the air.
What this means for you
For most of the year the daily range here is small and regular, which makes the exceptions stand out sharply. A barometric pressure forecast earns its keep from August through October and on winter frontal days.