The National Weather Service in Louisville at midday Tuesday issued a flash flood watch for portions of Indiana and Kentucky, including Jefferson County as well as Clark, Crawford, Dubois, Floyd, Harrison, Orange, Perry, Scott, and Washington in Indiana and Trimble County in Kentucky.
Moderate to heavy rainfall is expected late Wednesday evening and night with total rainfall amounts of one to two inches with locally heavier amounts. This will fall on top of saturated ground and could lead to an increasing threat of flash flooding into Wednesday night, the warning said.
Rainfall is expected to arrive midafternoon Wednesday and continue through Thursday morning with heavier intense rain bands moving in Wednesday evening, increasing the risk of flash flooding.
A flash flood watch means that conditions may develop that lead to an increased threat of rising rivers ... some of which will flood. The weather service encouraged residents in the affected areas to monitor later forecasts and be prepared to take action if warnings persist.
The National Weather Service earlier Tuesday had issued a weather alert related to a “complex storm system” that will arrive in the region Wednesday, bringing with it widespread precipitation starting with a mix of rain and snow in the morning and giving way to heavy rain later in the day.
The storm is being fueled by a low pressure system moving out of east Texas toward Southern Indiana and Northern Kentucky. Precipitation should be light starting out and, with ground temperatures above freezing, there should be little or no accumulation but motorists should still be cautious on bridges and overpasses.
More heavy rainfall is expected Thursday night with some gusty winds before rain tapers off overnight into Thursday morning as the front moves east.