896
FXUS63 KLOT 070519
AFDLOT

Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
1219 AM CDT Tue Jul 7 2026

.KEY MESSAGES...

- Dry and more seasonable conditions expected through Wednesday
  before shower and thunderstorm chances return Thursday.

&&

.DISCUSSION...
Issued at 248 PM CDT Mon Jul 6 2026

Surface high pressure will dominate across our area Tuesday
into Wednesday. The net result will be dry weather with mostly
sunny weather through midweek. Temperatures will rebound back
into the mid 80s Tuesday (70s near the lake with onshore winds)
and into the mid to upper 80s on Wednesday. While dry weather is
anticipated both days, chances for showers and thunderstorms
return to the forecast later in the week.

Later in the week, a surface cold front is forecast to slide
southward from the Upper Midwest into the lower Great Lakes.
This front will likely act as the focus for showers and
thunderstorms to our northwest Wednesday into Wednesday night,
then potentially across our area Thursday into Thursday night.
We will have to keep an eye on the threat for more locally heavy
rainfall with this activity, especially given the potential for
slow storm motions. Some lingering chances for showers and
storms will persist on Friday, though the with the effect front
likely to be shunted southward, the better focus for
precipitation Friday may largely end up well south of I-80.

This weekend into early next week, ensemble guidance supports
the building of an expansive upper-level ridge across the Plains
into the Upper Midwest. Building heat under this ridge will
result in warming temperatures (back into the upper 80s) into
our region through the weekend.

KJB

&&

.AVIATION /06Z TAFS THROUGH 12Z WEDNESDAY/...
Issued at 1219 AM CDT Tue Jul 7 2026

No major forecast concerns are expected through this TAF period
as mid-level riding (high pressure) will reside over the area.
Winds tonight will become more north-northwest (340-350 degrees)
with speeds remaining light around 3-5 kts. On Tuesday the
winds will begin to wobble a bit more easterly at the Chicago
terminals and GYY (360-010 degrees) in the morning before a lake
breeze results in a more definite easterly wind shift towards
midday with speeds remaining light around 6-8 kts. Winds will
once again become more light and variable Tuesday evening before
eventually settling into a more southwesterly directions
overnight into Wednesday morning. Otherwise, expect mostly clear
VFR skies to prevail through the period.

Yack

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...None.
IN...None.
LM...None.

&&

$$

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