Area Forecast Discussion
Issued by NWS Northern Indiana

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FXUS63 KIWX 172008

Area Forecast Discussion
National Weather Service Northern Indiana
308 PM EST Fri Nov 17 2017

Issued at 205 AM EST Fri Nov 17 2017

Considerable clouds and continued cool today with highs in the mid
40s. Rain develops tonight with thunder possible late. Periods of
rain Saturday give way to gusty northwest winds and falling
afternoon temperatures. Look for early morning highs in the 50s.


.SHORT TERM...(This Evening through Saturday)
Issued at 258 PM EST Fri Nov 17 2017

Quiet weather ends this evening as the next in what appears to be
a series of systems sweeps into the Great Lakes Region. Rain will
overspread from west to east overnight and continue through
Saturday night. Temperatures to move little overnight and expect
that there will be steady to even a slight rise in temperatures
overnight into Saturday AM.

Heavy rainfall is possible with this event, however the rainfall
amounts will be spread over a long enough period that most rivers
will be able to handle the increase in water. Ponding and lowland
flooding is not out of the question.

With the increased flow and instability, expect to have isolated
thunderstorm development but no severe weather expected. As the
gradient tightens late Saturday expect to see increasing winds and
will need to watch closely for possible wind advisory.


.LONG TERM...(Saturday Night through Friday)
Issued at 258 PM EST Fri Nov 17 2017

Thus begins the roller coaster ride of weather. Cold air settles
in the wake of the low Sunday. A brief period of light snow
showers expected...especially downwind of Lake MI. Cold and
blustery through the day Sunday. Brief period of quiet weather
Monday/Tuesday before another shot of cooler air sweeps into the
region for Wednesday. In the wake of that system,
Thursday/Thanksgiving Day looks to be a relatively mild and quiet
into Friday. Longer range remains unsettled with fast moving
systems ejecting across the northern Plains.


.AVIATION...(For the 18Z TAFS through 18Z Saturday Afternoon)
Issued at 1227 PM EST Fri Nov 17 2017

CI shield across northern IN in advance of the next system this
aftn. As the sfc high shifts east of Ohio this aftn the gradient
tightens with increasing southerly winds through tonight. As
moisture transport increases later today on the nose of the LLJ
expect the onset of precipitation this evening and continue
through the end of the fcst period. LLWS is expected in the 03-10Z
timeframe before subsiding. Winds turn more nwly late morning
into aftn on Sat.


LM...Small Craft Advisory until 3 AM EST Saturday for LMZ043-046.

     Gale Warning from 10 AM Saturday to 4 AM EST Sunday for LMZ043-




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