Now...Through 2 am...Areas of moderate to heavy rainfall continue across north and west saint lucie county late this evening. Other shower activity is occurring over eastern Indian River...Okeechobee and north Martin counties. Movement of this activity was off to the northwest. An additional 1 to 3 inches May fall locally across west and north saint lucie county past midnight. Otherwise...Shower and isolated thunderstorm activity is expected to increase from the south to the north overnight as a warm frontal boundary begins to lift northward from south Florida locally heavy rain and some minor flooding May be possible...Especially over areas that have experienced a good deal of rain earlier this evening. Focus continues for an approaching convective squall line over the gulf of mexico for late overnight. As the low pressure approaches the peninsula...The warm front over the southern peninsula will become better defined and lift northward. A large area of overrunning rain with embedded thunder will be possible late tonight into early Friday morning. Based on current timing...The squall line is forecast to push onshore the Florida gulf coast after sunrise and sweep across east central Florida during the late morning and early afternoon Friday across the north and mid/late afternoon south. Much of east central Florida will likely be placed under a tornado watch... Possibly issued before sunrise. Increasing low level jet and strong vertical shear will produce a threat for damaging winds and a few tornadoes Friday. There appears to be a somewhat greater threat for severe weather from osceola and brevard northward.
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