226 FXUS63 KLMK 140759 AFDLMKArea Forecast Discussion National Weather Service Louisville KY 359 AM EDT Tue Oct 14 2025
.KEY MESSAGES...
* Dry conditions are expected through the rest of the workweek with highs mostly in the 70s.
* Strong frontal boundary to move through the region late Saturday and into Sunday. Strong to severe thunderstorms will be possible during this time frame with 1-2 inches of rainfall.
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.SHORT TERM /THROUGH TONIGHT/... Issued at 359 AM EDT Tue Oct 14 2025
We can expect more of the same, dry, mostly sunny weather along with above normal temperatures for today with highs in the mid/upper 70s to near 80 across the KY/TN border. We remain under the influence of strong upper ridging and sfc high coming out of Canada into the Upper Midwest during the day. Higher gusts out of the northeast are possible this afternoon as a weak cold front works into central IN and stalls just to our north. This will slightly tighten the pressure gradient over the area along with added daytime mixing.
High pressure will continue to build in over the Great Lakes tonight as winds are expected to diminish and become calm. Lows will be a little warmer than some of the past nights in the lo2 50s to upper 40s and some patchy fog in river valleys and low lying areas are once again possible.
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.LONG TERM /WEDNESDAY THROUGH MONDAY/... Issued at 359 AM EDT Tue Oct 14 2025
We will remain under the influence of both upper ridging aloft and sfc high pressure through the end of the week. This will continue our dry and generally above normal temperatures for the second half of the week. Upper low Over the western US will slowly shift eastward from Wednesday towards the Dakotas as it gets absorbed and become a deep upper trough over the central US by Friday. This will shift the upper ridge eastward along with the sfc high pressure by Friday. This will set up return flow over the Ohio Valley advecting in Gulf moisture from the south with increased clouds.
By the weekend, the well advertised upper trough will begin to work through the Upper Midwest and into the Great Lakes. More Gulf moisture will continue to advect in from the south pushing dewpoints into the upper 50s/low 60s and increasing PWAT values to around 1.50" to 1.75" as a strong cold front approaches from the west. This will increase the chances of showers as well as thunderstorms for late Saturday into Sunday. There remains some timing issues between the deterministic models as the GFS remains the faster solution wanting to bring some of the showers/storms into the area by the afternoon, while the ECMWF remains slower with a more Saturday night into Sunday morning. Models show increased instability axis developing ahead of the approaching cold front with a strong LLJ of around 35-45kts. Both the SPC, CSU Machine learning and CIPS severe analogs key in on an area from the Ark-La-Tex into central IL/southern IN and nosing into parts of western KY. As was mentioned in the previous forecast, the better dynamics and instability look to be mostly east of our area during the day on Saturday, but as the trough axis and associated cold front work into the region Saturday night into Sunday, we could see an increased threat of strong to even severe storms, mainly for western KY.
The other impact could be from localized flooding as guidance continues to show the potential of 1 to 2 inches of rainfall over the area, with locally higher amounts from heavier showers and storms. Additional development Sunday for more convection is possible as the cold front begins to gross the area during the day. Limited instability and shear may help to minimize the threat but this will continue to be monitored over the next several days.
Ahead of the cold front on Saturday, highs will be their warmest into the low/mid 80s. Colder air arriving behind the cold front along with increased clouds and possible showers will see highs in the upper 60s to near 70. As the upper trough works eastward and develops into a closed low over the eastern Great Lakes, cold air advection behind the departing system will bring another cool day to start next week. Highs again in the mid/upper 60s.
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.AVIATION /06Z TAFS THROUGH 12Z WEDNESDAY/... Issued at 158 AM EDT Tue Oct 14 2025
Little to no change in the going forecast with VFR flight categories continuing through the period as we remain under upper ridging and under the influence of sfc high pressure. While confidence isn`t real high BWG could see a brief period or two where we get MVFR or even IFR VIS, so went with a tempo for a few hours this morning. Skies will remain clear the only impacts will be winds increasing some as a cold front tightens as high pressure builds in from the northwest as a cold front approaches and stalls over central IN this afternoon. Could see some gusts between 15-20kts still out of the northeast.
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.LMK WATCHES/WARNINGS/ADVISORIES... KY...None. IN...None.
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SHORT TERM...BTN LONG TERM...BTN AVIATION...BTN
NWS LMK Office Area Forecast Discussion