Coral, Illinois Weather Forecast Discussion

095
FXUS63 KLOT 252338
AFDLOT
Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
638 PM CDT Thu Sep 25 2025
.KEY MESSAGES...
- Fog possible early Friday morning, especially east of I-57.
- Dry and mild to unseasonably mild weather into next week.
&&
.DISCUSSION...
Issued at 219 PM CDT Thu Sep 25 2025
Outside of some isolated lingering lake effect showers across
parts of Lake and Porter counties in IN early this afternoon, all
is quiet across the area. For the remainder of the afternoon
expect temperatures to remain in the 70s, with skies ranging from
mostly sunny across northwestern IL to partly sunny across far
eastern IL into northwestern IN. Cloud cover will then quickly
diminish this evening as a surface ridge of high pressure shifts
overhead. The combination of light winds and mainly clear skies
under this high will likely again foster fog towards daybreak
Friday morning as temperatures drop below the cross over
temperature. This looks to particularly be the case across parts
of eastern IL and northwestern IN (east of I-57), where
conditions could favor a period of more notable fog early Friday
morning.
Any early morning fog should dissipate through mid morning.
Thereafter, expect a dry and unseasonably mild day Friday, with
highs topping out in the upper 70s to the low 80s. A weak mid-
level impulse and surface cold front will shift into far northern
IL late in the day. While no precipitation is expected with this
feature, a northeasterly wind shift a push of a bit cooler
temperatures (upper 60s to the low 70s) are expected by early
Friday evening.
In spite of this weak cool frontal passage, conditions will
quickly turn unseasonably mild again for Saturday as upper-level
ridging builds into the Midwest. Accordingly, westerly winds and
mostly sunny conditions are expected to yield temperatures
topping out in the low to mid 80s Saturday afternoon. Similar
conditions are expected for Sunday, though a lake breeze is likely
to keep conditions a bit cooler near the lake.
Mid and upper-level ridging is expected to shift in across the
Great Lakes through the middle of next week as the remnants of a
tropical system move into the southeastern CONUS. This pattern
will continue to favor dry and mild weather across our region.
However, with persistent easterly surface winds, expect the
warmest temperatures (around 80) across interior sections of
northern IL, with 70s likely elsewhere.
KJB
&&
.AVIATION /00Z TAFS THROUGH 06Z SATURDAY/...
Issued at 638 PM CDT Thu Sep 25 2025
No significant aviation concerns expected through this TAF
cycle. Light winds tonight should become westerly 5-10kt by
mid-late morning Friday. A lake breeze will probably develop
Friday afternoon with the current expectation that it would
remain east of ORD and MDW. Confidence in winds at GYY Friday
afternoon is low, as the lake breeze could result in winds at
GYY becoming light and variable or northeast in the afternoon.
Cold front is expected to move south down the lake later in the
afternoon and should combine with lake breeze, resulting in wind
shift to northeast later Friday afternoon or early Friday
evening. Confidence in precise timing of wind shift is low and
may need to be adjusted by an hour or two in later TAFs.
Other than a chance for some shallow ground fog at GYY tonight,
expect VFR conditions through the 24-30 hour TAF cycle.
- Izzi
&&
.LOT WATCHES/WARNINGS/ADVISORIES...
IL...None.
IN...None.
LM...None.
&&
$$
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NWS LOT Office Area Forecast Discussion