August 12, 20215 yr A couple strong to severe storms with locally strong to damaging wind gusts will be possible from a portion of the Northeast States into the Ohio, Tennessee and lower Mississippi Valleys Friday. Kentucky is in a category 1 Marginal Risk Area for Friday.
August 13, 20215 yr Author Moderate to strong instability is forecast to develop by afternoon across western and northern Kentucky. As surface heating takes place, thunderstorm development is expected to occur along an outflow boundary situated from southern Illinois into southern Indiana. This convection is forecast to move east-southeastward across western and central Kentucky during the afternoon. Further to the northeast into the central Appalachian Mountains, moderate instability is forecast to develop this afternoon. This is the reason the Storm Prediction Center has raised the threat level for the sections of Kentucky mentioned to a category 3 Slight Risk Area. From the National Weather Service Louisville office.
August 13, 20215 yr Author The only change from this morning is the Slight Risk Area may decrease some later today. The severe modes possible for later this afternoon into the evening hours are heavy rain, cloud to ground lightning and some small hail. As for timing, from around 5 pm EDT to 4 am EDT Saturday morning.
August 13, 20215 yr Author Mesoscale Discussion 1511 NWS Storm Prediction Center Norman OK 1213 PM CDT Fri Aug 13 2021 Areas affected...Ohio River Valley Concerning...Severe potential...Watch possible Valid 131713Z - 131915Z Probability of Watch Issuance...40 percent SUMMARY...Thunderstorms are expected to increase in coverage through the Ohio River Valley as daytime heating continues amid weak capping. Storms may be capable of damaging winds and severe hail, and a watch may be needed as storm coverage increases this afternoon.
Archived
This topic is now archived and is closed to further replies.