267
FXUS63 KIND 302254
AFDIND
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
654 PM EDT SUN AUG 30 2026
KEY MESSAGES
- PATCHY SPRINKLES OR LIGHT DRIZZLE POSSIBLE AT TIMES THROUGH EARLY
TONIGHT, MAINLY ACROSS NORTH-CENTRAL INDIANA
- INCREASINGLY HOT AND HUMID CONDITIONS THROUGH THE MIDDLE OF THIS
WEEK
- ISOLATED TO SCATTERED THUNDERSTORMS WILL BE POSSIBLE AT TIMES
THURSDAY THROUGH SATURDAY
DISCUSSION (THIS EVENING THROUGH SUNDAY)
ISSUED AT 247 PM EDT SUN AUG 30 2026
TODAY THROUGH TUESDAY NIGHT...
MOSTLY QUIET CONDITIONS ARE EXPECTED EARLY IN THE PERIOD DUE TO
SURFACE RIDGING AND LOW-LEVEL DRY AIR IN PLACE. CURRENT SATELLITE
AND RADAR IMAGERY DEPICTS EXTENSIVE MID TO HIGH CLOUDS ACROSS
NORTHERN PORTIONS OF CENTRAL INDIANA FROM AN APPROACHING UPPER WAVE
WITH SOME LIGHT RETURNS. HOWEVER, MOST OF THIS IS NOT REACHING THE
GROUND DUE TO DRY AIR. PATCHY SPRINKLES OR LIGHT DRIZZLE WILL BE
POSSIBLE AT TIMES THROUGH EARLY TONIGHT WHILE THE IMPULSE ALOFT
MOVES THROUGH. THE MID TO HIGH CLOUDS HAS HELPED KEEP TEMPERATURES
COOLER, IN THE LOW-MID 80S, ACROSS THE NORTH.
UPPER RIDGING BUILDING FURTHER INTO THE OHIO VALLEY WILL LIKELY
PROVIDE QUIET WEATHER CONDITIONS THROUGH TUESDAY. GUIDANCE DOES
SUGGEST A FEW SUBTLE IMPULSES RIDING THE NORTHERN PERIPHERY OF THE
RIDGE, BUT THESE FEATURES SHOULD TRACK SLIGHTLY FURTHER NORTH
RESULTING IN LESS THAN MID TO HIGH CLOUDS THAN THE DISTURBANCE
PUSHING THROUGH TODAY. THAT SAID, AT LEAST SOME ENHANCEMENT OF MID
TO HIGH CLOUDS APPEARS LIKELY WHICH COULD LIMIT DIURNAL HEATING
SLIGHTLY.
EXPECT SOUTHWESTERLY SURFACE FLOW AND THE BUILDING UPPER RIDGE TO
PROMOTE WARMING TEMPERATURES THE NEXT FEW DAYS. LOOK FOR HIGHS TO
REACH THE UPPER 80S TO LOW 90S BY MONDAY WITH HIGHS THEN APPROACHING
THE LOW TO MID 90S ON TUESDAY. HEAT INDICES ON TUESDAY COULD BE NEAR
THE LOW 100S. A HEAT ADVISORY MAY BE NEEDED FOR TUESDAY, BUT WILL
HOLD OFF FOR NOW GIVEN SOME FORECAST UNCERTAINTY.
WEDNESDAY THROUGH THURSDAY...
CONFIDENCE REMAINS HIGHER THAN USUAL THAT THE HOT AND HUMID
CONDITIONS WILL PERSIST THROUGH THE MIDDLE OF THIS WEEK. LONG RANGE
GUIDANCE DEPICTS THE AFOREMENTIONED UPPER RIDGE RETROGRADING AND
THEN AMPLIFYING ACROSS THE CENTRAL CONUS WHILE TROUGHING OVER THE
NORTHEAST. EXPECT HIGHS IN THE 90S WITH PEAK HEAT INDICES APPROACHING
ADVISORY CRITERIA. MEANWHILE, LOWS IN THE 70S WILL PROVIDE LITTLE
RELIEF FROM THE HEAT AND HUMID.
THERE IS SOME UNCERTAINTY IN THE FORECAST TOWARDS THURSDAY REGARDING
MAX TEMPERATURES AS AN UPPER WAVE MAY MOVE THROUGH THE AREA AS
NORTHWEST FLOW BEGINS TO DEVELOP ALOFT. ANOMALOUS MOISTURE IN PLACE
BY THURSDAY ALONG WITH SUFFICIENT FORCING FROM THE APPROACHING
DISTURBANCE SUPPORTS THE POTENTIAL FOR ISOLATED CONVECTION. A FEW
STRONG STORMS CANNOT BE RULED OUT GIVEN AT LEAST MODERATE
DESTABILIZATION AND SOME ENHANCEMENT OF MID TO UPPER LEVEL FLOW.
FRIDAY INTO THE WEEKEND...
CONFIDENCE IN EXACT DETAILS DECREASES TOWARDS THE END OF THIS WEEK
DUE TO DIVERGING MODEL SOLUTIONS. LONG RANGE GUIDANCE GENERALLY
DEPICTS THE UPPER RIDGE ACROSS THE CENTRAL CONUS CONTINUING TO
AMPLIFY WITH PERSISTENT NORTHWEST FLOW ACROSS CENTRAL INDIANA.
MULTIPLE SHORTWAVES ALOFT COULD MOVE THROUGH DURING THIS PERIOD
SUPPORTING THE POTENTIAL FOR AT LEAST ISOLATED CONVECTION AT TIMES.
IN ADDITION, A COLD FRONT MAY SLOWLY PUSH SOUTH LATE FRIDAY THROUGH
THE WEEKEND. THIS WILL PROVIDE ADDITIONAL FORCING FOR CONVECTION
WHILE ALSO GRADUALLY COOLING TEMPERATURES INTO SUNDAY. GREATER CLOUD
COVER AND LOW RAIN CHANCES SHOULD HELP KEEP TEMPERATURES COOLER AS
WELL. LOOK FOR HIGHS MOSTLY IN THE 80S TO NEAR 90F ACROSS THE FAR
SOUTH BY THIS WEEKEND.
AVIATION (00Z TAF ISSUANCE)
ISSUED AT 653 PM EDT SUN AUG 30 2026
IMPACTS:
- NONE EXPECTED.
DISCUSSION:
VFR CONDITIONS ARE EXPECTED THROUGH THE PERIOD.
UPPER WAVES WILL CONTINUE TO GENERATE MID AND HIGH CLOUDS,
ESPECIALLY ACROSS THE NORTHERN SITES. SOME OF THE MID CLOUD MAY
PRODUCE SPRINKLES/LIGHT SHOWERS AT KLAF, BUT NO OPERATIONAL IMPACTS
ARE EXPECTED FROM THESE. WILL LEAVE MENTION OF RAIN OUT OF THE TAFS.
A FEW CUMULUS WILL ALSO POP UP AGAIN ON MONDAY. WINDS WILL INCREASE
A BIT ON MONDAY AND A FEW GUSTS OVER 15KT ARE POSSIBLE.
IND WATCHES/WARNINGS/ADVISORIES
NONE.
AVIATION...50
DISCUSSION...MELO
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