Area Forecast Discussion
Issued by NWS Chicago, IL

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FXUS63 KLOT 280716
AFDLOT

Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
216 AM CDT Fri Jul 28 2017

.SHORT TERM...
216 AM CDT

Through tonight...

Weak secondary cold front will continue to move slowly south
across the area this morning, with some models hinting at some
isolated showers or sprinkles south of the Kankakee River this
morning. Prospects for any precip falling, let alone measurable,
are meager at best and kept forecast dry with just 10-15% of any
given area picking up any measurable precip. Otherwise, modestly
brisk northerly winds are expected today with dewpoints a good
10F+ lower than yesterday with temps in the same ballpark or a
bit cooler. Anticipate enough of a gradient tonight to keep any
fog confined to the typical wind sheltered, low lying areas and
not anticipating fog to get out of hand.

- Izzi

&&

.LONG TERM...
216 AM CDT

Saturday through Thursday...

After a very active wx pattern in July, it looks like August will
come in more like a lamb with a far more tranquil weather pattern
expected. Generally expect fairly seasonable temps through the
period with the only real threat of precipitation coming with a
progressive trough and associated cold front moving across the
region in the late Wednesday/early Thursday time frame.

- Izzi

&&

.AVIATION...
For the 06Z TAFs...

High pressure will remain anchored over the western Great Lakes
with little movement over the next 24-30 hours resulting in
fairly steady state conditions across northern Illinois and
northwest Indiana. During the day tomorrow, expect a modest
diurnal uptick in wind speeds with some gusts into the mid to high
teens expected for the Chicago area terminals. Few to scattered
afternoon cumulus is also expected. VFR conditions will prevail
throughout the TAF period.

BMD

&&

.MARINE...
1219 PM CDT

As surface trough and associated frontal boundary have moved
south to the lower Great lakes today, northerly winds have been
observed over much of the lake. Still anticipate increasing
northerly winds this afternoon into this evening with winds of 15
to 25 kt returning. Occasional gusts to 30 kt are still a
possibility, especially across the south half. These stronger
winds and higher waves will support hazardous conditions for small
craft this afternoon and tonight. Expect northerly winds to
continue Friday into the start of the weekend, with speeds
periodically staying around 15 to 25 kt during this time.
Hazardous conditions for small craft will continue as well, and
will need to monitor for these conditions to possibly last longer
into Saturday. High pressure will finally build overhead, allowing
the northerly winds to diminish through the remainder of the
weekend.

Rodriguez

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...Beach Hazards Statement...ILZ006-ILZ014 until 7 PM Saturday.

IN...Beach Hazards Statement...INZ001-INZ002 until 7 PM Saturday.

LM...Small Craft Advisory...nearshore waters
     until 10 AM Saturday.

&&

$$

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