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Today: Partly cloudy. A 20 % chance of showers in the afternoon. Highs in the lower 90s. East winds 10 to 15 mph.
Tonight: Partly cloudy in the evening then clearing. Lows in the lower 70s. Northeast winds 5 to 10 mph.
Forecast Details: stacked high pressure system is over the middle Atlantic area with a deep easterly flow over the County Warning Area. 00z JAX sounding had indicated 0-6 km mean flow at 100 degree near 16 knots. Satellite imagery shows an upper level low drifting southward over central Alabama helping to spread cirrus over the County Warning Area. At surface moisture convergence has resulted in a few light to moderate showers over coastal northeast Florida. Temperatures are in the middle 70s most areas, but near 80 at the coast where east winds are near 10 miles per hour. Meanwhile Cat 4 Hurricane Earl continues churning ~125 m north of Puerto Rico moving west-northwest.
The NHC forecast for Earl projects it moving west-northwest then northwest over the western Atlantic through Thursday. This will back deep layer wind field to northeast with even drier airmass pushing into the area. Precipitable waters today hovering just above 1 inch will drop below that through Thursday with only very isolated showers expected and temperatures near normal. Upper level low northwest of the County Warning Area will move southward and allow for drier conds aloft to develop by tonight.
For today an isolated shower or two expected near the northeast Florida coast with a threat of an isolated shower over inland northeast Florida by late morning and into the afternoon. Breezy easterly winds expected to develop over northeast Florida, especially coastal counties. Temperatures near normal around 88 to 93. Tonight skies expected to become mostly clear with light northeast low level winds. Enough decoupling possible well inland for some patchy fog. Fairly cool lows in a long while with middle 60s possible over inland southeast Georgia.
Today's Pollen Levels: 8.3 Medium High (on a scale to 12); Predominate Pollen: Ragweed, Grass and Chenopods.
For additional information visit the National Weather Service in Jacksonville website on the internet at http://www.srh.noaa.gov/jax/
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