Area Forecast Discussion
Issued by NWS Northern Indiana

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FXUS63 KIWX 250454

Area Forecast Discussion
National Weather Service Northern Indiana
1254 AM EDT Tue Jul 25 2017

Issued at 149 PM EDT Mon Jul 24 2017

High pressure will provide cooler and less humid conditions
tonight into Tuesday. Lows tonight will drop into the 50s, with
highs on Tuesday near 80 degrees. A brief warmup will occur
Wednesday prior to the arrival of cold front and increasing
chances for showers and thunderstorms Wednesday night into
Thursday. Drier and cooler conditions then return Friday into
the weekend.


.SHORT TERM...(This Evening through Wednesday)
Issued at 149 PM EDT Mon Jul 24 2017

No sensible weather concerns through the middle of the week with
stable/dry airmass in place. Low level anticyclone will build east-
southeast through the Great Lakes region under building heights
tonight into Tuesday. A trend toward mainly clear skies will
result with lower humidity and light winds allowing lows to drop
into the 50s tonight...recovering into the upper 70s/near 80 for
afternoon highs tomorrow. Wednesday will feature warmer/more humid
wx as southwest flow becomes established behind the exiting area
of high pressure and in advance of an approaching cold front.


.LONG TERM...(Wednesday Night through Monday)
Issued at 149 PM EDT Mon Jul 24 2017

An upper low over Alberta Canada as of this writing will eventually
open east and send another seasonably strong mid level shortwave
trough and attendant cold front through the area later Wednesday
night into Thursday. Moisture return/forcing/flow appears
sufficient to force a convective complex through sometime later
Wednesday night/Thursday, though timing/impacts at this range
remain sketchy. This period will have to be watched for a severe
threat and heavy rain potential. Drier and less humid wx then
returns Friday into the weekend as upper trough exits east and sfc
ridging nudges in from the northwest.


.AVIATION...(For the 06Z TAFS through 06Z Tuesday Night)
Issued at 1252 AM EDT Tue Jul 25 2017

Sfc High pressure ridge movg east across the wrn grtlks overnight
will result in little cloudiness with light/variable winds. Dwpt
depression down to 0-4F now across nrn IN and some ifr vsbys in
fog have been reported at MGC. Based on eve soundings and bufr
fcst soundings, low levels too dry for anything more than ground
fog mainly in rural locations, so continued with vfr conditions
in the tafs. As sfc ridge moves east Tuesday, light e-se flow will
develop across the area. VFR will continue with just a few cu
psbl during the aftn along with some cirrus debris spilling se
from nrn plains/upr midwest convection.




SHORT TERM...Steinwedel
LONG TERM...Steinwedel

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