National Weather Service Raw Text Product

Displaying AFOS PIL: AFDIWX Received: 2017-09-20 23:38 UTC

FXUS63 KIWX 202338

Area Forecast Discussion
National Weather Service Northern Indiana
738 PM EDT Wed Sep 20 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 00Z TAFS through 00Z Thursday Evening)
Issued at 734 PM EDT Wed Sep 20 2017

VFR this evening to start the period but some MVFR VIS
restrictions possible overnight as winds decouple and residual low
level moisture aids in some patchy fog development. Nothing like 
last night expected with only a small chance of IFR restrictions.
Upstream convection over WI may spill into IL before dissipating.
Mid and high level clouds will spread over terminals but building
ridge expected to inhibit eastward progression of decaying pcpn. 





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