Heavy Rain Expected to Begin Tonight

John Bobel

August 30, 2021

Here’s the latest on the rounds of heavy rain we will see tonight then again Tuesday.

Round One: Thunderstorms and showers will continue to produce locally heavy rainfall and localized flash flooding.  These impacts will be localized, and the best chance is generally along and north of I-64. A Flash Flood Watch is in effect this afternoon and tonight for northern Kentucky. (not in the Louisville area of responsibility)

Round Two -Tuesday and Tuesday Night: Widespread rain from the remnant low of Ida moves in from the south and pushes north during the morning hours. Banded heavy rain could cause localized flash flooding. A Flash Flood Watch is in effect Tuesday into Tuesday night for most of the Commonwealth, including nearly all of central Kentucky.  Moderate to high confidence in widespread rain, less confidence in where we can get a few hours of steady but hard tropical rain to cause flash flooding.

Highlights:

• Overall rainfall amounts remain unchanged, generally 2 to 4 inches total
• Most significant rain amounts along and east of a line from Bowling Green to Lexington.
• Locally heavy amounts with up to 2 inches per hour. 
• Heavy rain ends in western/central KY by early morning Wednesday
• Less of a threat for river flooding.  This will mostly be a short-term event affecting the small streams.