722
FXUS63 KIWX 081007
AFDIWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
607 AM EDT THU OCT 8 2026
KEY MESSAGES
- DRY CONDITIONS EXPECTED TODAY WITH HIGHS AROUND 70 AND LOW
AFTERNOON HUMIDITIES.
- A FEW SPRINKLES ARE POSSIBLE NEAR LAKE MICHIGAN FRIDAY EVENING.
- MORE WIDESPREAD LIGHT RAIN IS EXPECTED EARLY SUNDAY,
ESPECIALLY EAST OF I-69, ASSOCIATED WITH THE REMNANTS OF
ISAIAS. NO SIGNIFICANT IMPACTS ARE ANTICIPATED.
DISCUSSION
ISSUED AT 250 AM EDT THU OCT 8 2026
LARGE SURFACE HIGH ON THE UPWIND/SUBSIDENT SIDE OF DEEP EASTERN
CANADA TROUGH WILL SLIDE ACROSS OUR AREA TODAY AND ENSURE ANOTHER
PLEASANT WEATHER DAY. EXPECT JUST SOME PASSING HIGH CLOUDS AND HIGHS
AROUND 70F. THERE ARE SOME NONZERO FIRE WX CONCERNS TODAY. FORECAST
SOUNDINGS SHOW RELATIVELY DEEP MIXING INTO A VERY DRY AIRMASS.
SURFACE DEWPOINTS LIKELY CRASH INTO THE UPPER 30S THIS AFTERNOON
YIELDING RH VALUES AROUND 30 PERCENT. SURFACE GRADIENT IS NOT
PARTICULARLY STRONG BUT DEEP MIXING MAY YIELD SOME GUSTS UP TO 20
MPH. THESE VALUES ARE STILL SAFELY BELOW RED FLAG CRITERIA AND TEN
HOUR FUEL MOISTURES ARE STILL ABOVE 10 PERCENT BUT WE OFTEN SEE A
FEW FIELD/COMBINE FIRES ACROSS THE AREA IN THESE CONDITIONS DURING
HARVEST TIME.
SURFACE HIGH SLIDES TO THE SOUTHEAST TONIGHT AND RETURN FLOW RAMPS
UP DURING THE DAY FRIDAY. SEVERAL SOLUTIONS STILL SHOW SOME LIGHT
RAIN SHOWERS DEVELOPING ON THE NOSE OF THE BEST LLJ/THETA-E SURGE
SET TO CLIP OUR FAR NW CWA FRI EVENING. ADDED SOME LOW CHANCE POP'S
TO ACCOUNT FOR THIS BUT THE LOW LEVEL MOISTURE SURGE WILL BE
SIGNIFICANTLY IMPACTED BY ANTECEDENT DRY CONDITIONS AND ANY RAIN
AMOUNTS WILL BE VERY LIGHT. SW FLOW/WAA WILL PUSH HIGHS WELL INTO
THE 70S ON FRI AND TO AROUND 80F ON SAT. CLOUDS INCREASE LATE SAT
BUT DRY CONDITIONS WILL HOLD THROUGH THE DAYTIME HOURS.
ATTENTION THEN TURNS TO THE REMNANTS OF ISAIAS STILL SET TO LIFT
INTO THE OHIO VALLEY SAT NIGHT INTO SUNDAY. WHILE EXACT DETAILS
REGARDING THE TRACK AND SUBSEQUENT RAINFALL AMOUNTS IN OUR CWA STILL
SHOW SOME VARIABILITY, THERE IS INCREASING CONCENSUS THAT THE
HEAVIEST RAIN WILL LIFT THROUGH CENTRAL AND EASTERN OHIO WHILE OUR
CWA ONLY RECEIVES A GLANCING BLOW OF LIGHT RAIN. THE ONLY AREA TO
WATCH FOR SOME BRIEF MODERATE RAIN WILL BE OUR FAR SE AROUND
PORTLAND TO LIMA BUT EVEN THERE NOT EXPECTING ENOUGH TO CAUSE ANY
IMPACTS. THE REMNANTS OF ISAIAS LOOK TO GET QUICKLY ABSORBED INTO
THE MEAN WESTERLIES WITH THE BEST TROPICAL MOISTURE PLUME RIDING
ALONG AND EAST OF THE APPALACHIANS. THE MAIN CIRCULATION WEAKENS
SUBSTANTIALLY BY THE TIME IT REACHES OHIO AND EVEN WIND GUSTS LOOK
TO REMAIN BELOW 30 MPH. WILL OBVIOUSLY CONTINUE TO WATCH THIS PERIOD
CLOSELY BUT OVERALL LITTLE/NO IMPACTS ANTICIPATED FOR OUR CWA.
RAIN EXITS LATE IN THE DAY SUNDAY BUT ANOTHER COLD FRONT ARRIVES
WITH OUR NEXT CHANCE OF RAIN MON NIGHT. AFTER ONE MORE DAY NEAR 80F
ON MONDAY, HIGHS DROP BACK INTO THE 60S FOR THE MIDDLE OF NEXT WEEK
WITH LOWS WELL INTO THE 40S.
AVIATION /12Z TAFS THROUGH 12Z FRIDAY/
ISSUED AT 606 AM EDT THU OCT 8 2026
VFR CONDITIONS ARE EXPECTED AT THE TERMINALS, WITH LIGHT WEST-
NORTHWEST FLOW BECOMING CALM/VARIABLE TONIGHT.
IWX WATCHES/WARNINGS/ADVISORIES
IN...NONE.
OH...NONE.
MI...NONE.
MARINE...NONE.
DISCUSSION...AGD
AVIATION...MCD
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