...HEAT ADVISORY IN EFFECT FOR INLAND PORTIONS OF NORTHEAST FLORIDA THROUGH 7 PM TODAY...

Plan your trip Local Radar Detailed Forecast

Today: Becoming mostly cloudy. Chance of showers and thunderstorms in the morning, then showers and thunderstorms likely in the afternoon. Highs in the mid 90s. Southwest winds 5 to 10 mph. Chance of rain 60 %. Heat index readings 105 to 109.

Tonight: Partly cloudy. Chance of showers and thunderstorms in the evening then slight chance of showers and thunderstorms after midnight. Lows in the mid 70s. Southwest winds 5 mph in the evening becoming light. Chance of rain 40 %.

A Heat Advisory is in effect until 7 pm for inland portions of northeast Florida.

A potent upper level disturbance will rotate through this morning generating the greatest shower and thunderstorm coverage south ofthe I-10 corridor this afternoon. The main concerns with be excessive lightning and strong downburst winds along with very heavy rainfall. storm motion will be generally south to southeast around 5 to 10 mph.

An additional disturbance will move out of the tennessee valley and into the deep south late this evening and may bring an additional round of thunderstorms to the northern sections of the forecast area.

Forecast Details: morning soundings indicate the atmosphere is not as unstable as yesterday. This is due to large albeit weak mesoscale-high spawned from earlier convection coupled with a deep northwest flow regime with subtropical high anchored over the central United States. Numerical models indicate a thermal low will likely establish over south Georgia today as both sea-breezes propagate inland. The interaction of these sea-breezes, old outflow boundaries, unstable atmospheric conditions and an approaching middle-level shortwave trough will bring scattered to numerous showers and thunderstorms to the local area. The best coverage will likely occur across northeast Florida due to placement of aforementioned shortwave trough this afternoon coupled with higher dewpoint values.

Forecast highs look reasonable for today with temperatures ranging from the lower 90s east of I-95 to mainly upper 90s west of this corridor. A heat advisory remains in effect until 7 PM for the northern Suwannee River valley in North Florida. As was the case yesterday showers and thunderstorms will bring welcome relief from the heat.

Wet Micro-bursts, lightning and heavy rainfall will remain the main concerns especially with precipitable waters above 2 inches. Cannot rule out small hail this afternoon given favorable flow regime although freezing level is above 15,000 ft and shear is marginal in the hail growth region.

Today's Pollen Levels: 4.1 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/