876
FXUS61 KILN 261758
AFDILN
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE WILMINGTON OH
158 PM EDT SUN APR 26 2026
WHAT HAS CHANGED
NO SIGNIFICANT CHANGES.
KEY MESSAGES
1) SHOWERS AND THUNDERSTORMS WILL OCCUR MONDAY EVENING AND INTO THE
OVERNIGHT AHEAD OF A COLD FRONT. A FEW STRONG TO SEVERE STORMS WILL
BE POSSIBLE LATE MONDAY EVENING AND INTO THE OVERNIGHT HOURS.
2) A LOW PRESSURE SYSTEM WILL MOVE THROUGH THE OHIO VALLEY TUESDAY
NIGHT, BRINGING ADDITIONAL SHOWERS AND THUNDERSTORMS. A DRIER AND
COOLER AIRMASS WILL THEN SETTLE INTO THE REGION FOR THE REST OF THE
WEEK.
DISCUSSION
KEY MESSAGE 1)
MID LEVEL SHORT WAVE WILL LIFT NORTHEAST OUT OF THE CENTRAL PLAINS
AND INTO THE GREAT LAKES MONDAY INTO MONDAY NIGHT. AHEAD OF THIS, A
STRONG LOW/MID LEVEL JET WILL SHIFT EASTWARD BUT WEAKEN SOMEWHAT AS
IT MOVES INTO THE MID OHIO VALLEY THROUGH MONDAY NIGHT. SOUTHERLY
LOW LEVEL FLOW WILL LEAD TO SOME MOISTURE ADVECTION UP INTO THE
REGION AND THIS WILL COMBINE WITH DAYTIME HEATING TO PRODUCE GOOD
INSTABILITIES OFF TO OUR WEST THROUGH THE AFTERNOON HOURS. THIS WILL
ALLOW FOR WIDESPREAD SHOWERS AND THUNDERSTORMS TO DEVELOP/MOVE INTO
ILLINOIS AND PARTS OF INDIANA MONDAY AFTERNOON INTO MONDAY EVENING.
THE ACTIVITY OFF TO OUR WEST WILL EVENTUALLY CONGEAL INTO MORE OF A
LINE OF SHOWERS AND THUNDERSTORMS AHEAD OF THE APPROACHING COLD
FRONT LATER MONDAY EVENING. THE 12Z CAMS HAVE TRENDED SOMEWHAT
SLOWER WITH THE LINE OF STORMS AND BY THIS TIME, SURFACE BASED
INSTABILITIES WILL BE DECREASING ACROSS OUR AREA. SO WE WILL LIKELY
SEE A WEAKENING TREND IN THE STRENGTH OF THE STORMS AS THEY PUSH
EAST-SOUTHEAST ACROSS OUR AREA LATE MONDAY EVENING/MONDAY NIGHT.
STILL THOUGH, WITH THE STRONG FORCING, A FEW SEVERE STORMS WILL BE
POSSIBLE, WITH DAMAGING WIND THE MAIN THREAT. AS OF NOW, IT APPEARS
THE BEST CHANCE FOR SEVERE STORMS WOULD BE ACROSS OUR FAR
WEST/SOUTHWEST IN THE 11 PM TO 3 AM TIME FRAME.
KEY MESSAGE 2)
THE COLD FRONT WILL STALL OUT ACROSS OUR AREA TUESDAY NIGHT INTO
WEDNESDAY MORNING. ADDITIONAL INSTABILITY WILL DEVELOP THROUGH THE
AFTERNOON HOURS ON TUESDAY ALONG AND TO THE SOUTHEAST OF THE FRONT,
WITH SCATTERED SHOWERS AND THUNDERSTORM REDEVELOPING THROUGH THE
DAY. THE BEST CHANCE FOR THIS APPEARS TO BE ACROSS OUR SOUTHEAST BUT
THE EXACT LOCATION AND OVERALL COVERAGE WILL BE DICTATED BY WHERE THE
FRONT ENDS UP BY TUESDAY AFTERNOON.
ADDITIONAL MID LEVEL ENERGY WILL MOVE INTO THE LOWER OHIO VALLEY
TUESDAY EVENING, HELPING FOR A SURFACE WAVE/LOW TO DEVELOP ALONG THE
FRONTAL BOUNDARY. MORE WIDESPREAD SHOWERS AND THUNDERSTORMS WILL
OVERSPREAD THE AREA TUESDAY NIGHT IN ASSOCIATION WITH THIS FEATURE.
DEPENDING ON THE TRACK OF THE LOW, A LOW END SEVERE THREAT COULD
LINGER INTO TUESDAY NIGHT, ESPECIALLY ALONG AND SOUTH OF THE OHIO
RIVER.
BEHIND THIS SYSTEM, DRIER AND COOLER AIR WILL MOVE INTO THE REGION
FOR THE SECOND HALF OF THE WEEK.
AVIATION /18Z SUNDAY THROUGH FRIDAY/
MVFR CIGS HAVE FINALLY BEGUN TO ERODE AWAY/DISSIPATE OVER THE LAST
HOUR OR SO. THIS TREND WILL CONTINUE THROUGH MID AFTERNOON WITH VFR
CONDITIONS DEVELOPING AT ALL OF THE TAF SITES AND THEN CONTINUING
THROUGH THE REMAINDER OF THE TAF PERIOD.
OUTLOOK....THUNDERSTORMS POSSIBLE MONDAY NIGHT INTO TUESDAY.
ADDITIONAL THUNDERSTORMS POSSIBLE TUESDAY NIGHT THROUGH WEDNESDAY
MORNING.
ILN WATCHES/WARNINGS/ADVISORIES
OH...NONE.
KY...NONE.
IN...NONE.
DISCUSSION...JGL
AVIATION...JGL
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