790
FXUS63 KIWX 251730
AFDIWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
130 PM EDT FRI SEP 25 2026
KEY MESSAGES
- THIS WEEKEND, COOL, CRISP MORNINGS GIVE WAY TO AFTERNOON
TEMPERATURES IN THE LOW-TO-MID 70S.
- DRY CONDITIONS PERSIST UNTIL EARLY WEDNESDAY MORNING.
DISCUSSION
ISSUED AT 126 PM EDT FRI SEP 25 2026
HIGH PRESSURE FROM QUEBEC THROUGH THE WESTERN GREAT LAKES CONTINUES
TO PROMOTE FALL-LIKE CONDITIONS THIS AFTERNOON, WHILE PLENTY OF
CLOUDS STREAM IN BROAD LOW PRESSURE OVER THE CENTRAL PLAINS. LIGHT
RADAR RETURNS HAVE FAILED TO REACH THE GROUND DUE TO SIGNIFICANT DRY
AIR BELOW 16,000 FEET.
NO SIGNIFICANT WEATHER CONCERNS THROUGH THE WEEKEND AND EVEN THE
START OF NEXT WEEK. HIGH PRESSURE BECOMES SQUEEZED BY A NOR'EASTER
(TO THE EAST) AND DEEPENING LOW PRESSURE SPILLING INLAND (THIS
AFTERNOON) TO THE PACIFIC NORTHWEST. BY MONDAY, PERHAPS SOME HIGH
CLOUDS FROM THE NOR'EASTER SPREAD OVER NORTHWEST OHIO, BUT NO OTHER
IMPACTS ARE EXPECTED. TEMPERATURES WILL WARM SLIGHTLY THROUGH THE
WEEKEND, INTO THE 70S, AS UPPER-LEVEL HEIGHTS RISEN SOMEWHAT DUE TO
A BUCKLING OF THE JET STREAM TO BOTH THE WEST AND EAST.
OUR NEXT CHANCE FOR RAIN ARRIVES EARLY WEDNESDAY MORNING AS LOW
PRESSURE MOVING OVER THE NORTHERN PLAINS SPREADS A COLD FRONT
THROUGH OUR AREA. DEPENDING ON THE TIMING OF THE FRONT AND
INSTABILITY, WOULD NOT BE ENTIRELY SURPRISED TO SEE AN ISOLATED
STRONG STORM WITH A 45-KNOT 500-MB JET IN THE VICINITY, 35-40 KNOTS
OF SHEAR AND DEW POINTS IN THE LOW-60S. ADDITIONAL CYCLOGENESIS IS
DEPICTED OVER THE CENTRAL US THEREAFTER, PERHAPS BRINGING WET-
WEATHER LOCALLY BY NEXT WEEKEND.
AVIATION /18Z TAFS THROUGH 18Z SATURDAY/
ISSUED AT 115 PM EDT FRI SEP 25 2026
VFR CONDITIONS EXPECTED FOR THE NEXT 24 HOURS WITH LIGHT
NORTHEAST WINDS. THERE IS A WEAK DISTURBANCE OVER ILLINOIS
BRINGING HIGH CLOUDS TO THE AREA, BUT THE ATMOSPHERE IS TOO DRY
FOR ANY RAIN TO MAKE IT TO THE GROUND. IF SKIES CLEAR OUT TONIGHT
AS FORECAST, THERE COULD BE SOME GROUND FOG SATURDAY MORNING,
BUT GUIDANCE IS NOT INDICATING FOG, SO CONFIDENCE IS LOW.
IWX WATCHES/WARNINGS/ADVISORIES
IN...NONE.
OH...NONE.
MI...NONE.
MARINE...NONE.
DISCUSSION...BROWN
AVIATION...COBB
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