787 FXUS63 KLMK 270703 AFDLMKArea Forecast Discussion National Weather Service Louisville KY 303 AM EDT Sat Sep 27 2025
.KEY MESSAGES...
* Patchy fog possible this morning and Sunday morning.
* Dry with warming temperatures expected this weekend.
* Some uncertainty for next week, but the current forecast is for mostly dry and warm conditions.
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.SHORT TERM /THROUGH SUNDAY NIGHT/... Issued at 303 AM EDT Sat Sep 27 2025
A closed upper level low is over the TN Valley early this morning, with deep moisture streaming northward along and east of the Appalachians. Brief saturation in the lower levels is producing some brief cloudiness across south-central KY early this morning. These clouds are not likely to persist, but we will see additional SCT cu in the afternoon.
The upper low is forecast to rotate eastward through tomorrow while weakening. Meanwhile, amplifying ridging is forecast to build east across the Plains and Midwest. This will maintain a dry airmass and light N/NE winds. Rising heights aloft and increasing low-level thicknesses will support slightly warmer temps each day. Look for mostly sunny skies today with highs around 80-84 F.
Tonight looks clear and calm, with patchy fog. Sunday morning lows will be in the mid/upper 50s in most areas. Temperatures will rebound quickly Sunday morning, with afternoon highs in the 82-87 F range. Dry conditions will continue Sunday night, with a light NE wind and lows in the mid 50s to around 60.
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.LONG TERM /MONDAY THROUGH FRIDAY/... Issued at 303 AM EDT Sat Sep 27 2025
===== Monday - Monday Night =====
Continued dry conditions still look likely through Monday. Ridging at the surface and aloft will be centered north of the region, with dry NE flow. By this time, however, NC and VA will likely be seeing more substantial easterly moisture advection to the north of tropical systems in the western Atlantic. NHC has high confidence in Potential Tropical Cyclone Nine becoming a tropical storm within 48 hours. NHC`s latest forecast takes this tropical storm NNW off the east coast of Florida on Monday. Moisture streaming west on the north side of the tropical system will likely only reach the southern Appalachians by Monday, keeping central KY and southern IN dry. Expect another pleasant morning and warm afternoon, with highs in the low to mid 80s.
===== Tuesday - Friday =====
As NHC has indicated, there is considerably more uncertainty in the track of the tropical systems in the western Atlantic beyond Monday. For the western storm (currently Potential Tropical Cyclone Nine), guidance indicates this cyclone will slow/stall as it approaches the South Carolina coast midweek.
Rainfall chances briefly increase slightly during the midweek period as Atlantic moisture attempts to cross the Appalachians. These rain chances appear to peak on Tuesday across eastern Kentucky. Otherwise, relatively dry and pleasant weather looks possible for the remainder of the week. Highs in the upper 70s and lower 80s look possible, with lows in the 50s to around 60.
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.AVIATION /06Z TAFS THROUGH 12Z SUNDAY/... Issued at 137 AM EDT Sat Sep 27 2025
VFR conditions prevail through this forecast period. SCT-BKN clouds around 5 kft will linger across south-central KY this morning. We`ll see SCT cumulus this afternoon and early evening. N/NNE winds will be light through the period, increasing to 5-6 kts between 16-00Z today.
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.LMK WATCHES/WARNINGS/ADVISORIES... KY...None. IN...None.
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SHORT TERM...EBW LONG TERM...EBW AVIATION...EBW
NWS LMK Office Area Forecast Discussion