284
FXUS63 KIWX 112314
AFDIWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
714 PM EDT THU SEP 11 2025
KEY MESSAGES
- PLEASANT WEATHER CONTINUES WITH LIGHT WINDS AND HIGHS IN THE MID
80S ON FRIDAY.
- MINIMUM RELATIVE HUMIDITIES OF 30% TO 40% EACH AFTERNOON MAY BE
CONDUCIVE FOR ELEVATED FIRE DANGER.
- LOW CHANCES (AROUND 20%) FOR SHOWERS AND STORMS SATURDAY
AFTERNOON THROUGH SUNDAY MORNING; NO SIGNIFICANT RAIN IS
EXPECTED THROUGH THE END OF NEXT WEEK.
- A WARM AND DRY PATTERN WILL BECOME WELL ESTABLISHED BY THE
WEEKEND INTO EARLY NEXT WEEK WITH TEMPERATURES WELL ABOVE
NORMAL. HIGHS IN THE UPPER 80S TO LOW 90S EACH DAY.
DISCUSSION
ISSUED AT 258 PM EDT THU SEP 11 2025
HIGH PRESSURE OVER THE EASTERN ONTARIO IS PROVIDING A CLEAR, DRY,
AND WARM DAY TODAY AND THE SAME IS EXPECTED TOMORROW. AS A A
STRONG, AMPLIFIED UPPER LEVEL RIDGE BUILDS ACROSS THE CENTRAL
CONUS IN THE COMING DAYS, A GRADUAL WARMING TREND ENSUES THROUGH
THE WEEKEND AS WE END UP ON THE EASTERN PERIPHERY OF THE RIDGE.
TEMPERATURES WILL BE IN THE MID 80S AGAIN TOMORROW THEN RISE
INTO THE UPPER 80S TO LOW 90S BY SUNDAY. THE RIDGE BUILDS
THROUGH THE MIDWEST EARLY NEXT WEEK AND AN OMEGA BLOCK PATTERN
SETS UP OVER THE CONUS; TEMPERATURES SHOULD WARM INTO THE LOW
90S ON MONDAY AND TUESDAY. HAVE CONTINUED TO STICK WITH THE NBM
FOR TEMPERATURES OVER THE WEEKEND AND INTO EARLY NEXT WEEK; MOST
MODELS SEEM TO BE LATCHING ONTO THE UPPER 80S TO LOW 90S FOR
HIGHS EACH DAY. THE GFS STILL REMAINS AN OUTLIER WITH NEAR
RECORD HIGHS WELL INTO THE 90S. PERSISTENT DRY CONDITIONS WILL
ALLOW FOR LARGE DIURNAL TEMPERATURE SPREADS OF 30+ DEGREES, SO
IT ISN'T OUT OF THE QUESTION THAT A FEW CONSECUTIVE DAYS OF
HIGHS IN THE LOW 90S COULD HAPPEN THIS WEEKEND THROUGH EARLY
NEXT WEEK. MUCH WARMER THAN NORMAL TEMPERATURES LOOK TO STICK
AROUND THROUGH MUCH OF MID SEPTEMBER.
LOW CHANCES (AROUND 20%) FOR SHOWERS AND STORMS EXIST ON SATURDAY
AFTERNOON/EVENING INTO SUNDAY MORNING WITH A WEAK COLD FRONT. WITH A
LACK OF GULF MOISTURE, LIMITED INSTABILITY, AND ANTECEDENT DRY
CONDITIONS, CHANCES FOR RAIN CONTINUE TO DIMINISH WITH EACH NEW
NBM RUN. FORECAST SOUNDINGS SHOW DRY AIR IN THE LOW TO MID
LEVELS OVER THE WEEKEND AS THE COLD FRONT SLIDES SOUTH, WHICH
WOULD SUGGEST ANY RAINFALL WILL BE VERY LIMITED IF AT ALL. QPF
SHOULD BE LIMITED TO 0.1" OR LESS, UNLESS A HEAVY SHOWER OR
ISOLATED THUNDERSTORM IS ABLE TO DEVELOP. ANY RAIN THAT FALLS
OVER THE WEEKEND WILL NOT BE ENOUGH TO OFFSET DEVELOPING DROUGHT
CONDITIONS. IN FACT, ANTECEDENT DRY CONDITIONS OVER THE PAST
FEW WEEKS WILL LIKELY CONTRIBUTE TO RAPID ONSET DROUGHT ACROSS
THE OHIO RIVER VALLEY AND GREAT LAKES REGIONS IN MID SEPTEMBER.
PER THE MOST RECENT US DROUGHT MONITOR RELEASED THIS MORNING,
AREAS OF D1 MODERATE DROUGHT HAVE ALREADY DEVELOPED ALONG THE US
24 CORRIDOR AND INTO NORTHWEST OHIO. DROUGHT WILL LIKELY EXPAND
IN THE COMING WEEKS WITH NO SIGNIFICANT RAINFALL IN SIGHT.
ONE ADDITIONAL CONCERN OVER THE NEXT SEVERAL DAYS GIVEN WARM AND DRY
CONDITIONS IS FIRE DANGER. CLEAR SKIES AND WARMING TEMPERATURES
SHOULD ALLOW FOR AFTERNOON DEWPOINTS TO MIX DOWN INTO THE UPPER
40S TO LOW 50S. MINIMUM AFTERNOON RELATIVE HUMIDITY VALUES WILL
BE BETWEEN 30 TO 40 PERCENT EACH AFTERNOON FOR THE NEXT SEVERAL
DAYS. HOWEVER, SHOULD ANY GRASS OR BRUSH FIRES DEVELOP, WINDS
WILL BE LIGHT ENOUGH THAT IT LIKELY WON'T SPREAD QUICKLY. AVOID
OUTDOOR BURNING!
AVIATION /00Z TAFS THROUGH 00Z FRIDAY/
ISSUED AT 712 PM EDT THU SEP 11 2025
VFR CONDITIONS WILL PREVAIL THROUGH THIS TAF PERIOD. A FEW HIGH
CLOUDS AND MAINLY LIGHT/VARIABLE WINDS EXPECTED.
IWX WATCHES/WARNINGS/ADVISORIES
IN...NONE.
OH...NONE.
MI...NONE.
MARINE...NONE.
DISCUSSION...JOHNSON
AVIATION...ANDERSEN
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