037
FXUS61 KILN 290637
AFDILN
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE WILMINGTON OH
237 AM EDT MON JUN 29 2026
WHAT HAS CHANGED
INCREASED SIGNAL FOR SHOWERS/STORMS DURING HOLIDAY WEEKEND.
KEY MESSAGES
1) HOT AND HUMID CONDITIONS THIS WEEK.
2) SHOWERS/STORMS POSSIBLE DURING HOLIDAY WEEKEND.
DISCUSSION
KEY MESSAGE 1)
NO MODIFICATIONS TO THE CURRENT HEADLINES AS THE FORECAST GENERALLY
REMAINS ON TRACK.
NOTABLY WARMER TEMPERATURES ARRIVE TODAY WITH INCREASED H5 HEIGHTS.
WITH DEWPOINTS ALSO REMAINING IN THE 70S, HEAT INDICIES WILL BEGIN TO
APPROACH THE MIDDLE 90S TO LOWER 100S. PORTIONS OF CENTRAL OH DOWN
THROUGH NORTH-CENTRAL KY LIKELY HAVE HEAT INDICIES REMAIN IN THE 90S.
THUS, HAVE CONTINUED TO KEEP SOME OF THESE COUNTIES OUT OF THE HEAT
ADVISORY FOR TODAY.
BY TUESDAY, THE H5 RIDGE BROADENS AND BECOMES MORE AMPLIFIED ACROSS
THE MIDWEST REGION. CONFIDENCE INCREASES IN HEAT ADVISORY CRITERIA
BEING REACHED TUESDAY THROUGH THURSDAY, WHICH IS WHY THE HEADLINE IS
BEING HELD ACTIVE THROUGH THURSDAY. STILL CANNOT RULE OUT POTENTIAL
UPGRADE TO AN EXTREME HEAT WARNING FOR ANY OF THESE DAYS DEPENDING ON
HOW MODEL GUIDANCE TRENDS. IT DOES STILL APPEAR THAT THE HOTTEST
TEMPERATURES WILL ARRIVE MIDWEEK WHEN THE RIDGE IS STRONGEST. BEYOND
THURSDAY, CONFIDENCE IS NOT HIGH ENOUGH TO KEEP A HEAT HEADLINE IN
EFFECT AS MODELS CONTINUE TO HIGHLIGHT INCREASING CLOUDS, ALONG WITH
SHOWER AND THUNDERSTORM CHANCES.
KEY MESSAGE 2)
GLOBAL MODELS AND ENSEMBLES HAVE BEEN FAIRLY CONSISTENT FOR SEVERAL
DAYS NOW SHOWING A MORE ACTIVE PATTERN FOR THE HOLIDAY WEEKEND. BY
FRIDAY, THE MEAN AXIS OF THE RIDGE BEGINS TO SHIFT EASTWARD AND THE
H5 RIDGE DOES BEGIN TO DAMPEN A BIT. THE RESULT IS AN INCREASED
POTENTIAL FOR SHOWERS/THUNDERSTORMS AS UPPER LEVEL FORCING BECOMES
ENHANCED, WITH SEVERAL SHORTWAVES RIPPLING THROUGH PORTIONS OF THE
MIDWEST REGION. PLENTY OF INSTABILITY WILL BE PRESENT AS WELL GIVEN
THE HOT/HUMID AIR MASS IN PLACE, PROMOTING MORE THUNDERSTORM ACTIVITY.
WHILE THIS POTENTIAL SYNOPTIC PATTERN WOULD INCREASE CONVECTIVE
ACTIVITY, IT WILL ALSO LIMIT THE POTENTIAL FOR EXTREME HEAT.
AVIATION /06Z MONDAY THROUGH FRIDAY/
CHAOTIC PATTERN OVERNIGHT AS VARIOUS CLOUD TYPES AND HEIGHTS MOVE
ACROSS THE REGION. FORTUNATELY, CIGS ARE EXPECTED TO REMAIN VFR, BUT
CLOUDS WILL AFFECT POTENTIAL VSBY REDUCTIONS. GUIDANCE NOW LESS
AGGRESSIVE IN VSBY REDUCTIONS AT KCMH/KLCK, BUT STILL EXPECTING AT
LEAST MVFR VSBYS THERE. LOWEST VSBY REDUCTIONS WILL BE AT KLUK DUE TO
RIVER VALLEY FOG. HOWEVER, VSBYS WILL LIKELY BOUNCE AROUND WITH
PASSING CLOUDS.
VSBYS IMPROVE AFTER DAYBREAK, WITH VFR CONDITIONS FORECAST THE
REMAINDER OF THE TAF PERIOD. WINDS BECOME MORE PREDOMINANT OUT OF THE
SSW TODAY, BUT REMAIN BELOW 10 KTS.
OUTLOOK...THUNDERSTORMS ARE POSSIBLE ON FRIDAY.
ILN WATCHES/WARNINGS/ADVISORIES
OH...HEAT ADVISORY FROM NOON TODAY TO 8 PM EDT THURSDAY FOR OHZ026-034-
035-042>044-051>053-060>062-070>072-077>081.
HEAT ADVISORY FROM NOON TUESDAY TO 8 PM EDT THURSDAY FOR OHZ045-046-
054>056-063>065-073-074-082-088.
KY...HEAT ADVISORY FROM NOON TODAY TO 8 PM EDT THURSDAY FOR KYZ089>099.
HEAT ADVISORY FROM NOON TUESDAY TO 8 PM EDT THURSDAY FOR KYZ100.
IN...HEAT ADVISORY FROM NOON TODAY TO 8 PM EDT THURSDAY FOR INZ050-058-
059-066-073>075-080.
DISCUSSION...CLARK
AVIATION...CLARK
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