Area Forecast Discussion
Issued by NWS Northern Indiana

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FXUS63 KIWX 241844

Area Forecast Discussion
National Weather Service Northern Indiana
244 PM EDT Tue Apr 24 2018

Issued at 244 PM EDT Tue Apr 24 2018

Areas of light rain and drizzle will be possible into this
evening, mainly east of Interstate 69. Cool and dry otherwise with
lows in the 40s tonight. The rest of the week through next weekend
will feature mainly dry conditions and temperatures averaging a
little below normal for late April. This changes early next week
as southwesterly winds usher in much warmer air.


.SHORT TERM...(This Evening through Wednesday)
Issued at 244 PM EDT Tue Apr 24 2018

A mid-upper level low over the TN Valley will meander/open east
toward the Central Appalachians tonight, while a northern stream
shortwave translates southeast into the Great Lakes region later
tonight/Wed AM. Moisture transport into a 850 mb trough axis, north
of the TN Valley system, should clip areas east of I-69 with a
period of light rain later this afternoon/evening. A few areas of
light rain/drizzle will also be possible to the west during this
time, especially north of US 6 where some weak upper divergence/mid
lvl pva overspreads. Cloudy/cool otherwise into tonight.

Negative low-mid level theta-e advection in the wake of a cold front
will bring an end to light rain/drizzle chances and clearing skies
on Wednesday. Cool northerly flow off Lake MI will make for a
cooler day (mid 40s to mid 50s) into far nw IN/sw Lower MI, while
partial clearing and deeper mixing likely allows highs to make a
run at 60F elsewhere.


.LONG TERM...(Wednesday Night through Tuesday)
Issued at 244 PM EDT Tue Apr 24 2018

Broad upper troughing over the Eastern US will keep temperatures a
little below normal Thursday through the upcoming weekend. A couple
of moisture starved/weak cold fronts will move through, one Friday
and another early Saturday. The Friday front could generate a few
showers, though chances remain low (20-30%) as better moisture
convergence bypasses south-southeast with another upper system
tracking through the TN Valley. Dry otherwise with high pressure in
control Thursday through Sunday.

Early next week will feature a significant warming trend and more
dry wx as positive height anomalies overspread in advance of a
Western US trough. Low level southwest flow on the backside of sfc
high pressure may allow highs to reach near 80F by Tuesday.


.AVIATION...(For the 18Z TAFS through 18Z Wednesday Afternoon)
Issued at 120 PM EDT Tue Apr 24 2018

Upper low over Kentucky will continue to stream low level moisture
into the region through the late evening. Ceilings expected to
drop this evening into the overnight given diurnal cooling and
another round of moisture advection. IFR likely at KFWA though
confidence at KSBN is much lower. VFR will return by late in the


LM...Small Craft Advisory from 2 AM Wednesday to 2 AM EDT Thursday
     for LMZ043-046.



SHORT TERM...Steinwedel
LONG TERM...Steinwedel

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