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Today: Partly cloudy until the afternoon then becoming mostly cloudy. Chance of showers and slight chance of thunderstorms in the morning, then showers and thunderstorms likely in the afternoon with locally heavy rainfall possible. Highs in the mid 90s. Southeast winds 5 to 10 mph. Chance of rain 60 %. Heat index readings 104 to 108 in the afternoon.
Tonight: Partly cloudy. A 20 % chance of showers and thunderstorms in the evening. Patchy fog after midnight. Lows in the lower 70s. Southeast winds 5 mph in the evening becoming light.
Numerous showers and embedded thunderstorms are expected today and slow storm motions will allow for locally heavy rainfall amounts of 1 to 3 inches in the stronger storm activity. Gusty winds around 40 mph and frequent cloud to ground lightning will be possible as well.
The combination of temperatures in the low to mid 90s and high humidity will create heat indices around 105 degrees prior to the onset of any precipitation.
Forecast Details: soundings still showing high precipitation water amounts around 2.25 inches across the forecast area and with light southeast steering flow to push a slow moving Atlantic coast seabreeze inland should still see numerous showers and thunderstorms this afternoon, mainly over inland areas. 500 temperatures in the middle levels have show a slight cooling trend close to -5c and with a bit steeper lapse rate cannot rule a few stronger wet microburst type storms with wind gusts to 50 miles per hour. Although main threat will continue to be locally heavy rainfall and frequent cloud to ground lightning in stronger storms as they drift toward the northwest at 5 to 10 miles per hour.
Plenty of insolation to push maximum temperatures into the lower to middle 90s to combine with middle 70s dewpoints this afternoon and widespread heat indices around 105 degrees once again. This used to be somewhat of an unusual occurrence, but this Summer appears to be normal. No end to the humid conditions in sight and will be tough to delineate marginal heat advisory days through the end of the week.
Thunderstorm activity will linger over inland areas through the evening hours with quiet conds expected after midnight.
Today's Pollen Levels: 6.6 Medium (on a scale to 12); Predominate Pollen: Grass and chenopods.
DId You Know That … Hurricane Camille collided with the Mississippi coast on this date in 1969, becoming the second most destructive hurricane in U.S. history. The storm packed winds up to 190 mph near Bay Saint Louis, Miss. while claiming 256 lives. Some ships were even carried 7 miles inland by the hurricane
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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