Area Forecast Discussion
Issued by NWS Northern Indiana

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FXUS63 KIWX 190620

Area Forecast Discussion
National Weather Service Northern Indiana
220 AM EDT Mon Jun 19 2017

Issued at 140 AM EDT Mom Jun 18 2017

A strong low pressure system over southeast Ontario will move
slowly northeast early this week resulting in cooler and less
humid air over our area. A couple of troughs rotating around the
Ontario low are expected to cause scattered showers and a few
thunderstorms in our area today and Tuesday. High pressure will
move across our area Wednesday providing fair weather. The high
will move east late this week as a cold front approaches from the
northwest, resulting in warmer more humid conditions with a chance
of thunderstorms.


.SHORT TERM...(This Evening through Monday)
Issued at 242 PM EDT Sun Jun 18 2017

Cold front was making steady progress across the area, currently
bisecting the area from SW to NE. Beginning to see a slow uptick in
shower activity ahead of it from central Indiana into NW Ohio. Pre-
frontal trough has worked well east of the area, taking any severe
threat with it into central and eastern Ohio. Expecting scattered
showers and maybe some thunder ahead of the front for the next
couple of hours with much quieter conditions arriving overnight.
Much more comfortable sleeping weather tonight with lows dropping
into the upper 50s to around 60. A disturbance will move through the
region, bringing a chance for showers and a few storms mainly during
the afternoon and evening hours as peak heating and cold pool aloft
combine to steepen low level lapse rates to 8 - 8.5 c/km.


.LONG TERM...(Monday Night through Sunday)
Issued at 242 PM EDT Sun Jun 18 2017

Upper level trough across the Great lakes will be responsible for
cooler and less humid weather along with chances for a shower or
storm into Tuesday as a series of weak disturbances move through. No
rainout by any means, but enough to maybe wet down a few locations.
temperatures will begin to moderate back towards normal by Thursday
with humidity values increasing. A frontal boundary may stall across
the lower Great lakes as the next system moves in from the Plains to
bring additional chances for rainfall, possibly more widespread and
heavier as additional moisture becomes available. For the time being
keeping with high chc pops given variable location of the front and
timing of waves over the past several runs on all med range models.


.AVIATION...(For the 06Z TAFS through 06Z Monday Night)
Issued at 139 AM EDT Mon Jun 19 2017

An upper level disturbance combined with cold air aloft this
afternoon will bring a chance for showers and isolated storms this
afternoon. Kept thunder out of TAFs for now given isolated nature
of thunder. Otherwise, winds will generally be out of the west at
7 to 10 kts.




LONG TERM...Fisher

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