Area Forecast Discussion
Issued by NWS Northern Indiana

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000
FXUS63 KIWX 201736
AFDIWX

Area Forecast Discussion
National Weather Service Northern Indiana
1236 PM EST Mon Nov 20 2017

.SYNOPSIS...
Issued at 609 AM EST Mon Nov 20 2017

Mostly sunny and becoming windy this afternoon. Afternoon highs will
be in the mid 40s. Southwest breezes continue tonight with lows in
the mid 30s.

Slight chance of a shower late Tuesday otherwise dry and seasonable
Wednesday through Friday.

&&

.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 18Z TAFS through 18Z Tuesday Afternoon)
Issued at 1231 PM EST Mon Nov 20 2017

Wind gusts have already reached around 25 kts this aftn and
expect this through the aftn period. Sfc high pressure over ern TN
this aftn will shift ewd overnight with a frontal boundary approaching
from the wrn Gtlks. Expect passage at KSBN to be around the end
of the fcst period so opted to keep winds from the sw until 18Z.
Otherwise VFR conds through Monday with only mid level clouds
moving into the region tmrw morning.

VFR this period as sfc ridging drifts ewd through the TN valley.
Fairly vigorous return flow though by aftn with swrly gusts aoa
25kts.

&&

.IWX WATCHES/WARNINGS/ADVISORIES...
IN...NONE.
MI...NONE.
OH...NONE.
LM...Gale Watch through Tuesday evening for LMZ043-046.

     Small Craft Advisory until 3 PM EST this afternoon for LMZ043-
     046.

&&

$$

SYNOPSIS...T
SHORT TERM...JAL
LONG TERM...JAL
AVIATION...Frazier


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