Area Forecast Discussion
Issued by NWS Northern Indiana

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000 FXUS63 KIWX 272307 AFDIWX AREA FORECAST DISCUSSION National Weather Service Northern Indiana 700 PM EDT WED JUL 27 2016 .SYNOPSIS... Issued at 420 AM EDT Wed Jul 27 2016 An upper level trough developing through the Great Lakes will bring a chance for showers and thunderstorms Thursday afternoon and persisting into Saturday. Temperatures will remain seasonable into early next week before a significant warming trend ensues. && .SHORT TERM...(This Evening through Thursday night) Issued at 242 PM EDT Wed Jul 27 2016 As an interesting aside...vis imagery loop this aftn which clearly shows cntr of sfc ridge nr KRZL. Meanwhile wk upstream sw trough ovr wrn MN will cont to translate sewd this pd...crossing the local area Thu aftn. Still concerned though wrt old stalled fntl zone invof the OH river and swd shunt of deeper ll mstr into the TN valley. Nonetheless enough of a focus aloft looks to be present to act on a at least a weakly unstable airmass by aftn and sprtv for sct storms esp south half of cwa in proximity to track of sw trough and somewhat btr ll theta-e ridging. Otrws as this circulation crosses into Oh overnight some signals of shra contg Thu night alg/north of the highway 30 corridor as brief mid lvl fgen dvlps within nwwd trailing mid lvl confluence zone. && .LONG TERM...(Friday through Wednesday) Issued at 242 PM EDT Wed Jul 27 2016 Generally zonal flw aloft underneath east Canada troughing will break sharply twd more upr ridging cntrd acrs the cntrl plains by erly nxt week. Hwvr old synoptic fntl zone xpcd to remain bottled up invof the OH river this pd w/general subsidence xpcd w/nwd extent and see ltl reason to carry more than a minimal diurnally fvrd pop Fri/Sat aftn. Aft that fairly sig upr ridging xpcd to dvlp through the plains esp mid-lt pd. Nwd extent of upr ridge and placement uncertain w/considerable spread noted amongst med range guidance. Hwvr lg scale pattn points to well abv normal temps dvlpg twd Dy7 and persisting thereafter alg w/a propensity for a potentially more active pattn to dvlp alg nrn periphery of this hot/unstable airmass. && .AVIATION...
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(For the 00Z TAFS through 00Z Thursday Evening) Issued at 700 PM EDT Wed Jul 27 2016 VFR conditions will continue to persist through this TAF cycle with light winds. A weak upper level disturbance combined with a weak surface cold front will bring chances for showers and thunderstorms in the out period of the TAFs Thursday afternoon. However...areal coverage still in question so will hold off on any mention until a later issuance.
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&& .IWX Watches/Warnings/Advisories... IN...NONE. MI...NONE. OH...NONE. LM...NONE. && $$ SYNOPSIS...T SHORT TERM...T LONG TERM...T AVIATION...JAL Visit us at www.weather.gov/iwx Follow us on Facebook...Twitter...and YouTube at: www.facebook.com/NWSNorthernIndiana www.twitter.com/nwsiwx www.youtube.com/NWSNorthernIndiana

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