Small storms are popping up around the Louisville area after a fairly calm night that featured a few storms in Southern Indiana. The same trough of low pressure over the eastern half of the nation that's generating today's storm activity will see a potent burst of energy round the base of it late this evening into tomorrow morning. This piece of energy, which is really a small trough within the main trough over the east right now, is called a shortwave trough. This shortwave will have some fast winds aloft as it treks through Kentuckiana late this evening and that will along with a cold front moving through early tomorrow morning will trigger a threat of severe storms.
While scattered storms will be possible for most of today, the best timing for severe storms in Kentuckiana looks to be from 10pm to 4am. The main threats from the storms that go severe will be damaging winds and hail but any of these storms can have heavy rain and lightning. Since these storms will be hitting during the overnight period they won't have the punch that they could've had during the daytime. The tornado threat looks very low right now but as with any line of storms moving through there's a possibility that a kink in the line could form a small spin-up. A Slight Risk of severe weather has been issued for this evening through early tomorrow morning for the entirety of Kentuckiana. The good news with all of this is that much cooler air will be filtering in behind the cold front for Friday and the weekend!
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