Area Forecast Discussion
Issued by NWS Northern Indiana

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FXUS63 KIWX 171941

Area Forecast Discussion
National Weather Service Northern Indiana
341 PM EDT Fri Mar 17 2017

Issued at 339 PM EDT Fri Mar 17 2017

Temperatures will continue to slowly rise above freezing and into
the middle and upper 30s this afternoon. Areas of fog can be
expected into this evening ahead of a cold front moving through
tonight. A chance for light snow showers will exist into
Saturday. Highs Saturday afternoon will top out in the upper 30s
to lower 40s. High pressure will move back into the area Sunday
resulting in dry weather with near normal temperatures. Rain is
likely Monday as another cold front moves through with colder
temperatures returning for the middle of next week.


.SHORT TERM...(This Evening through Saturday)
Issued at 339 PM EDT Fri Mar 17 2017

While some slick spots will persist a bit longer, have cancelled
the advisory as temps have generally reached or exceeded freezing.
Last of the precip was exiting to the northeast with at least
some clearing potential before cold front and next shortwave bring
at least a chance for some rain/snow showers. Prior to the fronts
arrival, increase in low level moisture will result in expanding
fog into this evening before the front scours out the low level
mstr. Have added mention through 3z with patchy drizzle.

Lake enhancement will start overnight into Saturday morning.
Delta T`s won`t be overly impressive (near 10 C) but combined with
the synoptic features should see at least scattered rain/snow
showers into Saturday morning. Chances should quickly diminish
Saturday afternoon.


.LONG TERM...(Saturday Night through Friday)
Issued at 339 PM EDT Fri Mar 17 2017

Moderating temperatures are expected into the first part of the
next week ahead of the next system to bring a good chance for at
least some shower activity. Sunday night into Monday a cold front
will sweep through with at least 1 round of showers and maybe a
few storms as limited instability arrives. Have left any thunder
mention out for now. Highs Monday will reach into the 50s before
the front passes with temps then back to more normal levels.

Temperatures will fall back below normal for mid week before the
next trough digs into the west and sends heights rising with
potential for 60s by Friday along with increasing shower/storm


.AVIATION...(For the 18Z TAFS through 18Z Saturday Afternoon)
Issued at 132 PM EDT Fri Mar 17 2017

Icing potential has finally ended at terminals as near surface
cold wedge remained firmly in place through the morning hours.
Mainly drizzle this afternoon with IFR cigs and vis. Upstream IFR
and LIFR extends into northern IL and southern WI. Hires guidance
keeps these in place through this evening before dry slot upstream
approaches. However...guidance showing cold front and wrap around
clouds and moisture moving back in as this clearing approaches so
did not try to time it into terminals. Rather sharp fast moving
short wave passes through later tonight with some light snow
showers possible in cold air advection immediately behind front.
Modest lake enhancement being picked up by models suggesting
scattered snow showers late tonight through mid day Saturday
especially closer to lake and KSBN.







LONG TERM...Fisher

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