Potentially strong thunderstorms building to the west of Kentucky and southern Indiana on Monday are expected to arrive over Kentuckiana around 10 p.m. Monday, the Storm Prediction Center says.
The SPC has placed most of Kentuckiana under a slight 2 out of 5 risk for severe weather, and the forecast for the overnight period includes damaging winds, heavy rain and possible tornadoes.
Severe storms are expected to continue after midnight as the system moves through Kentuckiana, carrying the threat into the early hours of Tuesday.
The numbers are blunt: a 2 out of 5 severe-weather risk and an expected arrival time of about 10 p.m. Monday, followed by continued storms after midnight. The hazards listed by forecasters — damaging winds, heavy rain and possible tornadoes — are the same ones that make even a "slight" classification consequential for the hours after dark.
Context matters here. Most of Kentuckiana sits inside the SPC's slight severe-weather risk, and the alerts are relevant overnight because the storms are forecast to persist past midnight into Tuesday morning. That timing puts the peak of the system during hours when visibility is reduced and many people are asleep.
The friction in this forecast is simple and immediate: a slight 2 out of 5 risk on the official scale can still include fast-moving, damaging storms and possible tornadoes. The classification can sound modest on paper even as the list of expected hazards reads like a severe-weather checklist.
There is a human thread to the forecast. Mark Toothaker, an employee of Spendthrift Farm who will attend the Kentucky Derby this weekend, figures into the story not because he is a meteorologist but because his plans intersect with the forecast. Toothaker said the failed attempt made him laugh so hard that he got a seizure, which in turn led to the discovery of a brain tumor.
Toothaker will attend the Kentucky Derby this weekend, according to the information available. The late-Monday system now scheduled to pass through Kentuckiana begins a sequence of weather that could influence the region in the days before the race.
How the system behaves after 10 p.m. Monday and whether the severe storms that continue after midnight track in a way that elevates impacts remain the key unknowns. Forecasters have provided the timing and the list of possible hazards; the next move is the storms themselves.
For people in Kentuckiana watching the overnight forecast, the combination of a 2 out of 5 risk, damaging winds, heavy rain and possible tornadoes frames a narrow window of concern beginning around 10 p.m. Monday and extending after midnight. For Mark Toothaker, who says a late diagnosis followed a medical episode caused by laughter, the approaching system is an added development as he prepares to be in the region this weekend for the Kentucky Derby.
