...CONTINUED HOT CONDITIONS WITH HEAT INDICES 105 TO 109...

Plan your trip Local Radar Detailed Forecast

Today: Partly cloudy. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the mid 90s. Northeast winds 5 to 10 mph. Chance of rain 50 %. Heat index readings 103 to 107.

Tonight: Partly cloudy in the evening then clearing. Patchy fog after midnight. Lows in the lower 70s. East winds 5 mph in the evening becoming light.

The combination of hot temperatures and high humidities will continue to produce heat indices between 105 and 109 degrees this afternoon. Individuals who must be outside are reminded to drink plenty of fluids.

Scattered showers and thunderstorms will develop along both seabreezes by the afternoon with the greatest coverage of storms along the collision near the I-75 corridor late this afternoon and this evening. The main concerns will be excessive lightning and gusty winds.

Forecast Details: large upper high presently centered over south Arkansas with north to northeast flow across the area. After some late convection along the Atlantic and Gulf Coast seabreeze collision skies have cleared across most of the area. Temperatures at 2 am were mostly in the middle to upper 70s with some 80 degree readings along the Atlantic coast. Patchy fog had developed at a few sites.

Mostly diurnal thunderstorms will continue with northeast to east flow focusing most convection over interior and west areas each late afternoon and evening. Will need to watch for disturbances rounding the north periphery of the high as it slowly retrogrades over the next few days. However, flow aloft remains fairly zonal north of the high and this should shunt most disturbances north of the area. Lighter middle and upper level flow coupled with southwest low-level gradient on Thursday may allow more activity to reach east zones. Temperatures will remain above normal across most of the area. Warm temperatures coupled with high dew points will keep heat indices in the 105 to 108 degree range each afternoon.

Today's Pollen Levels: 5.5 Medium (on s a scale to 12); Predominate Pollen: Grass.

For additional information visit the National Weather Service in Jacksonville website on the internet at http://www.srh.noaa.gov/jax/