661
FXUS63 KLMK 072358
AFDLMK
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LOUISVILLE KY
758 PM EDT MON SEP 7 2026
..UPDATED AVIATION DISCUSSION
KEY MESSAGES
* DRY AND SEASONABLE LABOR DAY EXPECTED WITH ONLY A SMALL CHANCE OF
A SHOWER OR STORM AROUND THE LAKE CUMBERLAND REGION BY EARLY
EVENING.
* THE HOTTEST DAY OF THE WEEK WILL BE WEDNESDAY WITH HIGHS IN THE
LOW TO MID 90S AND PEAK HEAT INDICES IN THE LOW 100S WEST OF I-65.
* A COLD FRONT ARRIVES THURSDAY MORNING WITH 70-80% CHANCE OF
SHOWERS AND A FEW STORMS POSSIBLE. FAIRLY WIDESPREAD RAINFALL
AMOUNTS BETWEEN .25" AND .5" ARE CURRENTLY EXPECTED.
SHORT TERM /THROUGH WEDNESDAY/
ISSUED AT 244 PM EDT MON SEP 7 2026
HIGH PRESSURE CENTERED TO THE NORTHEAST OF THE REGION IS HELPING TO
PROVIDE QUIET WEATHER TODAY. THERE IS STILL A SMALL CHANCE FOR A FEW
ISOLATED SHOWERS AND STORMS OVER THE LAKE CUMBERLAND REGION LATER
THIS AFTERNOON. LITTLE TO NO SHEAR WILL PREVENT THESE STORMS FROM
BECOMING SEVERE. THOUGH BRIEF GUSTY WINDS AND LIGHTNING WILL BE
POSSIBLE. AS INSTABILITY WANES THIS EVENING, SHOWERS AND STORMS WILL
DISSIPATE.
UPPER RIDGING WILL SHIFT SLIGHTLY EAST AND STRENGTHEN, WHICH WILL
INCREASE TEMPERATURES INTO THE LOW 90S ON TUESDAY AND LOW-MID 90S ON
WEDNESDAY. WE WILL REMAIN DRY ON TUESDAY AND MOST OF WEDNESDAY AS
SUBSIDENCE CONTINUES TO HOLD OVER THE REGION. HEAT INDICES ON
WEDNESDAY WILL BE IN THE 95-105 RANGE, WITH 100-105 ALONG AND WEST
OF I-65. A HEAT ADVISORY WILL BE POSSIBLE FOR WEDNESDAY.
ON WEDNESDAY, THE PRESSURE GRADIENT WILL INCREASE AS A STRONG SYSTEM
BEGINS TO MOVE INTO THE UPPER MIDWEST. COUPLED WITH DAYTIME MIXING,
EXPECTING TO SEE BREEZY CONDITIONS (20-25MPH) ON WEDNESDAY AFTERNOON.
LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/
ISSUED AT 244 PM EDT MON SEP 7 2026
WEDNESDAY EVENING - THURSDAY NIGHT...
AS THE AFOREMENTIONED STRONG SYSTEM MOVES THROUGH THE UPPER MIDWEST
AND GREAT LAKES, THIS WILL BRING A COLD FRONT THROUGH THE OHIO
VALLEY. ALONG AND AHEAD OF THIS COLD FRONT, WIDESPREAD SHOWERS AND
STORMS ARE EXPECTED. TROUGHING ASSOCIATED WITH THIS SYSTEM WILL
BRUSH THE NORTHERN HALF OF THE REGION. THIS WILL PLACE BETTER SHEAR
VALUES (35-40KTS) OVER THE NORTHERN HALF OF THE REGION. SOUTHERLY
FLOW WILL CONTINUE TO PUMP MOISTURE INTO THE REGION AS DEW POINTS
WILL BE IN THE LOW-MID 70S WEDNESDAY AND THURSDAY. PWATS WILL
INCREASE TO ABOUT 2.0 INCHES AHEAD OF THE COLD FRONT. A STRONG LLJ
LOOKS TO SET UP RIGHT ALONG THE FRONT, WHICH MAY LEAD TO SOME
CONVECTIVE TRAINING OVER THE NORTHERN HALF OF THE REGION. AS OF THIS
FORECAST, THERE IS A CHANCE FOR MARGINAL SEVERE STORMS AND FLOODING.
LOOKING TO SEE A WIDESPREAD 0.25-0.5 INCHES OF RAIN, WITH AREAS IN
SOUTHERN INDIANA AND NORTHERN KENTUCKY SEEING UP TO 1 INCH. THE
LIMITING FACTOR FOR SEVERE STORMS WILL BE INSTABILITY, DEPENDING ON
THE TIMING OF THIS FRONT. CURRENTLY, THE COLD FRONT IS EXPECTED TO
APPROACH THE REGION WEDNESDAY EVENING AND SLOWLY PUSH SOUTH THROUGH
THURSDAY AS TROUGHING ALOFT WEAKENS.
FRIDAY - SUNDAY...
HIGH PRESSURE WILL FOLLOW THE COLD FRONT AND HELP TO BRING
TEMPERATURES BACK INTO THE MID 80S. CHANCES FOR ISOLATED TO
SCATTERED SHOWERS AND STORMS WILL REMAIN OVER THE SOUTHERN HALF OF
THE REGION INTO THE START OF THE WEEKEND. THESE CHANCES WILL
STEADILY CREEP NORTH THROUGH THE WEEKEND AS RETURNING SOUTHERLY FLOW
INCREASES TEMPERATURES AND MOISTURE. THERE IS WEAK OVERALL FLOW, SO
DETAILS WILL BECOME CLEARER OVER THE NEXT FEW FORECAST CYCLES.
AVIATION /00Z TAFS THROUGH 06Z WEDNESDAY/
ISSUED AT 758 PM EDT MON SEP 7 2026
HIGH PRESSURE OVER THE REGION WILL KEEP VFR CONDITIONS IN PLACE.
WINDS CURRENTLY OUT OF THE NORTHEAST WILL VEER TOWARDS THE SOUTH
OVERNIGHT. TOMORROW, EXPECT CUMULUS TO DEVELOP WITH SOME ISOLATED
SHOWERS NEAR LEX AND RGA POSSIBLE.
LMK WATCHES/WARNINGS/ADVISORIES
KY...NONE.
IN...NONE.
SHORT TERM...SRW
LONG TERM...SRW
AVIATION...KDW
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