Area Forecast Discussion
Issued by NWS Northern Indiana

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FXUS63 KIWX 210526

Area Forecast Discussion
National Weather Service Northern Indiana
126 AM EDT Thu Sep 21 2017

Issued at 100 PM EDT Wed Sep 20 2017

Very warm and dry weather will persist into next week.
Daily highs will range from 85 to 90 with lows in the 60s.


.SHORT TERM...(Tonight and Thursday)
Issued at 205 PM EDT Wed Sep 20 2017

Primary question this period is maximum temp extent underneath
tremendous upper ridge blowing up ewd of deep trough carving out
through the wrn US and stormy wrn Atlantic through wrn Caribbean.
Given observed temps immediately upstream through ern MO/and much of
IL will bump temps higher. However recent localized heavy rainfall
last two days may retard sfc heating to some degree.

Given pocket of drier air aloft advecting up in swrly flow
across the area along with warm mid level temps will not entertain
any mentionable pops northwest along lake breeze.


.LONG TERM...(Friday through Tuesday)
Issued at 205 PM EDT Wed Sep 20 2017

Ridging sfc and aloft builds further to begin this period. 590+ dm
heights at 500mb suggest another run at 90 possible wrn areas Fri
aftn. Thereafter thermal ridge dampens a bit in response to sfc
ridge intensification through the ern OH valley. Nevertheless mid to
upper 80s likely through Mon.


.AVIATION...(For the 06Z TAFS through 06Z Thursday Night)
Issued at 119 AM EDT Thu Sep 21 2017

Decoupling winds and clear skies may allow for some patchy,
shallow fog to develop at both sites towards morning. Maintained
MVFR vsby for a short period.

VFR conditions expected by mid morning, with cirrus from
upstream, likely decaying convection, streaming in from time to
time along with some cu during the afternoon hours.





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