Area Forecast Discussion
Issued by NWS Northern Indiana

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FXUS63 KIWX 200714

Area Forecast Discussion
National Weather Service Northern Indiana
214 AM EST Mon Nov 20 2017

Issued at 252 PM EST Sun Nov 19 2017

Clouds will decrease through the evening hours and winds will
diminish to between 5 and 10 mph. Low temperatures overnight will
drop into the middle and upper 20s. Monday will see sunshine with
breezy conditions as high temperatures climb into the 40s. A weak
cold front will bring a small chance for light showers Tuesday
afternoon with colder temperatures behind it along with small
chances for light lake effect snow showers Tuesday night. The
holiday period of Wednesday through Friday should be dry with
seasonably cool temperatures.


.SHORT TERM...(Today and Tonight)
Issued at 212 AM EST Mon Nov 20 2017

Surface analysis has high pressure centered over the TN and lower
OH valley and will provide a quiet weather pattern in the short
term. Pattern aloft flattening to more zonal flow as more Pacific
energy streams onshore in western US. This will have surface ridge
axis shifting quickly eastward today to the Virginias and
Carolinas by this afternoon. Breezy SW flow on backside of high
will have area in low level WAA and send temps back into the mid
40s. Fair and seasonable tonight with lows in the mid 30s.


.LONG TERM...(Tuesday through Sunday)
Issued at 212 AM EST Mon Nov 20 2017

Progressive low amplitude pattern aloft will have an active
northern stream across southern Canada through the long term
period. Each system will drag a cold front across the lower 48
that will be lacking in both mass convergence along the front and
moisture return from the gulf. Result will be low chance POPs
ahead of the front and weak lake effect setup in its wake.
Temperatures through the period will see warm-ups into the 40s
ahead of each system then cooling back into the 30s behind them.


.AVIATION...(For the 06Z TAFS through 06Z Monday Night)
Issued at 1210 AM EST Mon Nov 20 2017

VFR this period as sfc ridging drifts ewd through the TN valley.
Fairly vigorous return flow though by aftn with swrly gusts aoa


LM...Gale Watch from this afternoon through Tuesday evening for

     Small Craft Advisory until 3 PM EST this afternoon for LMZ043-




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