Area Forecast Discussion
Issued by NWS Northern Indiana

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FXUS63 KIWX 230111

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

Issued at 905 PM EDT Fri Sep 22 2017

Very warm conditions will continue on Saturday with high
temperatures reaching around the 90 degree mark once again. Much
above normal temperatures will continue into the early parts of
next week as highs reach into the mid to upper 80s. Sharply cooler
air will build into the region by midweek as a cold front tracks
across the area.


Issued at 901 PM EDT Fri Sep 22 2017

Showers/isolated storms have dissipated across the area with
nocturnal cooling and quiet conditions shaping up the rest of the
night. Relatively high crossover temps and decent radiational
cooling conditions should support some mainly patchy shallow fog
late tonight/early Saturday morning. Min temps appear to be in
good shape with only minor tweak for evening update to refine
cloud trends associated with debris from dissipated showers.


.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 impulse
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 00Z TAFS through 00Z Saturday Evening)
Issued at 728 PM EDT Fri Sep 22 2017

High pressure setting up to the northeast of the area will
continue to provide plenty of dry air to the region through the
forecast period. As such, evening storms will continue to
dissipate towards sunset.

With a similar moisture profile to last night, it appears some
agricultural fog/br might form Saturday morning. Will go with some
MVFR br at FWA/SBN, but feel this could be too low and br may
remain shallow and within VFR conditions, especially at SBN.





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