221 FXUS63 KLMK 141218 AFDLMKArea Forecast Discussion National Weather Service Louisville KY 818 AM EDT Sun Sep 14 2025
.KEY MESSAGES...
* Isolated to scattered showers and storms will continue to track from north to south through the area this morning. No severe weather is expected at this time.
* Dry weather is expected over the next week. With most of the region experiencing abnormally dry or moderate drought conditions already, many counties have burn bans in place at this time. Temperatures will be unseasonably warm with highs in the upper 80s to the lower 90s.
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.UPDATE... Issued at 818 AM EDT Sun Sep 14 2025
Weak mid-level perturbation continues to move south-southwest across southern Indiana this morning. This feature has produced a swath of showers/storms that began in the early morning hours and continues at this hour. Back edge of this activity is now pushing through Clark county IN and this activity is likely to remain just west of the US 31W corridor over the next 1-2 hours. Expect that this activity will be departing the Louisville Metro by 945-1000 AM.
Couple of stronger storms were noted moving south and southwest through the region. One storm was located near West Point and will drop southward into eastern Meade and into north/northwest Hardin (roughly along a line from Muldraugh to Fort Knox to Radcliff/Vine Grove). Second storm is out over northern Ohio county, though this storm has shown signs of weakening in the last 30 min or so.
With any of these storms, brief heavy rainfall, gusty winds to 30 mph, and frequent lightning will be seen. In general, we expect much of this activity over west-central KY to diminish by late morning.
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.SHORT TERM /THROUGH TONIGHT/... Issued at 306 AM EDT Sun Sep 14 2025
Isolated showers and storms are tracking into the forecast area early this morning, driven by a upper level embedded shortwave swinging down in the general troughing pattern and a slight uptick in 850mb winds. Despite ACARS soundings showing a dry layer from the sfc up to around 850mb, area traffic webcams show wet roads in the Louisville metro, indicating rain rates are overcoming the dry low levels. Some cells have picked up in lightning strikes, likely due to the storms feeding off lingering MUCAPE. Fortunately these storms are elevated, but given the dry air in the column, could still see some wind gusts as a DCAPE gradient exists over the area.
We`ll continue to see showers and storms stream from north to south through the area this morning, though severe weather chances are low but a few strong storms will remain possible. CAMs are in fairly good agreement of seeing isolate to scattered activity continue across central KY after 12z today, potentially as late as 15-17z today. A drier trend will settle in by the afternoon, along with clearing skycover. As a result of morning precip and lingering clouds, our sfc temps should be slightly lower than yesterday. Expect most of the area to hit the mid to upper 80s, though some of our western most counties could approach 90. The upper level flow will continue to feature an omega block type pattern with central CONUS ridging, and troughing on the coasts. This pattern will begin to break down by tonight.
Some CAMs do indicate some isolated precip development overnight again in western KY, closer to a weak sfc boundary and where higher PWAT axis is expected to be. Currently expect a dry night, though would not be surprised if a low chance PoP would be needed in our west later on if the PWAT axis shifts a little more east. Generally though, do expect a quiet weather night with mostly clear skycover. Temps are forecast to drop into the 60s.
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.LONG TERM /MONDAY THROUGH SATURDAY/... Issued at 306 AM EDT Sun Sep 14 2025
===== Monday - Wednesday =====
The upper level flow will transition into a Rex block pattern by Monday, with the upper level high/ridge shifting over the Great Lakes, and the East Coast trough closing off into an upper low over the southeastern US. Any moisture associated with the low will likely remain over the Carolinas, which keeps a dry forecast for the first half of the upcoming week. This blocking pattern will likely begin to break down on Wednesday as another trough swings across the High Plains.
Above normal temps are expected during this time, with daily highs hitting the lower 90s. Fortunately heat indices will not deviate much from the sensible temps as dewpoints will remain in the upper 50s to low 60s during the afternoons.
As stated in the previous discussion, the increasingly dry weather will worsen drought conditions across the area. With fuels continuing to dry out, this may lead to some areas seeing an elevated fire risk. As such, numerous counties have burn bans in place at this time.
===== Thursday - Saturday =====
The upper trough over the High Plains will pivot across the central US in the back half of the week, and may end up deepening into an upper closed low by the weekend. It will drive a weak but elongated frontal boundary through the central part of the country, and will bring precip chances back to the region by Thursday night and into Friday and the weekend. Given the dry conditions as mentioned above, any rain would be a welcome sight to the area. PoPs are limited, as this front could be lacking a deeper moisture pool to work with. As such, QPF for later this week is still meager, with just a few hundredths in the forecast for now.
Thursday looks to be our final day of temps hitting the 90s, as increased cloud cover and falling heights aloft will support a slight drop in temps for Friday and into the weekend. Forecast highs currently target upper 80s for Friday, but low to mid 80s for Saturday.
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.AVIATION /12Z TAFS THROUGH 18Z MONDAY/... Issued at 646 AM EDT Sun Sep 14 2025
Isolated to scattered showers and storms will continue for a few more hours this morning, but overall a drier trend is expected for the terminals. Mid-level cloud deck will eventually clear out by the afternoon, leading to mostly clear skycover with some cirrus overhead. VFR conditions will continue into tonight, with light winds.
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.LMK WATCHES/WARNINGS/ADVISORIES... KY...None. IN...None.
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UPDATE.......MJ SHORT TERM...CJP LONG TERM....CJP AVIATION.....CJP
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