NWS/JAX

Weather Underground

...HEAT INDICES 105 TO 110 DEGREES THIS AFTERNOON...

...SCATTERED STORMS MAINLY INLAND THIS AFTERNOON...

Plan your trip Local Radar Detailed Forecast

Today: Mostly sunny in the morning then partly cloudy. Chance of showers and thunderstorms in the afternoon. Highs in the mid 90s. West winds 5 mph shifting to the south in the afternoon. Chance of rain 40 %. Heat index readings 103 to 107.

Tonight: Partly cloudy with a 20 % chance of showers and thunderstorms in the evening...then mostly clear after midnight. Patchy fog after midnight. Lows in the mid 70s. West winds 5 mph.

Scattered showers and thunderstorms are expected mainly during the afternoon and early evening with most of the activity across the inland areas. Frequent lightning and gusty winds will be the main concerns with the stronger storms.

Highs in the mid to upper 90s this afternoon will push heat index into the 105 to 110 degree range. Use extra caution while outside today.

Forecast Details: large 500 MB high remains anchored over the southeast US through Tuesday then retrogrades as a weak front to the north drops south across southeast Georgia. Model soundings indicate warm and dry air aloft and middle level (700 MB) cap that will result in a fair amount of sunshine, prior to the onset of scattered storms, which results in maximum temperatures in the middle/upper 90s and heat index of 105-110 degrees. Scattered storms will be diurnal and mainly inland this afternoon/early evening and then area wide Tuesday-Wednesday as the mean layer (1000-500 mb) high shifts west and weak front to the north edges south. Have capped probability of precipitation at 40% for now. Main concerns will be frequent lightning and strong and gusty winds.

Today's Pollen Levels: 4.4 Low 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/