Area Forecast Discussion
Issued by NWS Northern Indiana

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FXUS63 KIWX 221747

Area Forecast Discussion
National Weather Service Northern Indiana
147 PM EDT Fri Sep 22 2017

Issued at 350 AM EDT Fri Sep 22 2017

Very warm and dry weather will persist into the middle of next week
as high pressure remains over the Great Lakes. Highs will range
from the upper 80s to the lower 90s with lows in the 60s for the
next several days.


.SHORT TERM...(Tonight and Saturday)
Issued at 145 PM EDT Fri Sep 22 2017

Sfc ridge parked through the OH valley will expand/intensify this
period. As it does low level flow trajectories will a bit more
easterly and temper otherwise hot thermal ridge. Otherwise sensible
wx nil.


.LONG TERM...(Sunday through Thursday)
Issued at 145 PM EDT Fri Sep 22 2017

Upper ridge will slowly breakdown by Tue in response to ern seaboard
approach of HRCN Maria and wwd ejection of lead sw impluse through
the nrn plains and subsequently collapse late week in response to
potent sw trough digging sewd out of Canada into the Great Lakes.
This will mark a significant cooldown with below normal temps by Sat.

In the transistion poorly forced and moisture limited cold front
will push through the area late Tue night-Wed morning and hold with
minimalistic pops.


.AVIATION...(For the 18Z TAFS through 18Z Saturday Afternoon)
Issued at 100 PM EDT Fri Sep 22 2017

Ridging sfc and aloft will remain parked over the Great Lakes this
period with wx nil. Some expansion/intensification in sfc ridge and
light backing flow should yield a bit more br potential early Sat
morning and held with previous MVFR mention late tonight. Could even
see a period of IFR vsby restriction invof KFWA toward daybreak yet
will punt that potential to later fcsts.





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