Schley School Illinois Weather Forecast Discussion

946
FXUS63 KLOT 101927
AFDLOT
Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
227 PM CDT Fri Oct 10 2025
.KEY MESSAGES...
- Isolated showers are possible through this evening, followed
  by a few isolated light lake effect rain showers or sprinkles
  over northeast Illinois on Saturday.
&&
.DISCUSSION...
Issued at 227 PM CDT Fri Oct 10 2025
A cold front currently encroaching on the northwest CWA will
drift southeastward across the CWA through tonight. Cannot rule
out some sprinkles along the front, especially with a passing
upper-level trough this evening. A NNE wind shift behind the
front will then advect a band of lake effect clouds into
northwest Indiana and especially northeast Illinois late tonight
through much of Saturday. Low inversion heights under 5-6kft
will greatly limit precip potential, but marginal delta temps
and daytime diurnal enhancement could generate isolated light
lake effect rain showers or sprinkles over northeast Illinois
late morning into the afternoon.
The overall pattern across the central CONUS will remain
relatively quiet next week with low-amplitude ridge anchored
across the central CONUS. A trough tracking northeast to south-
central Canada will push a weakening cold front toward the
forecast area early in the week. A trailing mid-level front may
bring some decaying showers or sprinkles over the area Monday
afternoon and evening, but dry conditions are expected at this
time. A surface cold front will then shift southward over the
area Monday night and stall south of the forecast area by
Tuesday morning. Weak WAA and a mid-level disturbance rounding
the ridge may yield a period of light rain Tuesday night. The
central CONUS ridge will then amplify across the Mississippi
River Valley late in the week, likely resulting in dry and
seasonably warm conditions.
Kluber
&&
.AVIATION /18Z TAFS THROUGH 00Z SUNDAY/...
Issued at 1218 PM CDT Fri Oct 10 2025
No major forecast concerns are expected through the TAF period.
A cold front will continue to move through the area this
afternoon and evening resulting in some isolated
showers/sprinkles at times through 21-22z. Otherwise, expect
breezy southwest winds ahead of the front (gusts around 20 kts)
to ease and become northwesterly behind the front this evening.
Winds will finally become northeasterly Saturday morning and
remain as such for the remainder of the period with speeds
around 8-10 kts. As for the skies, BKN to OVC 3500-4500 ceilings
are expected this afternoon ahead of the front but will give way
to mostly clear skies tonight. Though, some VFR lake effect
clouds are expected to develop Saturday morning and linger at
the Chicago terminals through Saturday afternoon.
Yack
&&
.LOT WATCHES/WARNINGS/ADVISORIES...
IL...None.
IN...None.
LM...Small Craft Advisory from 1 AM to 10 AM CDT Saturday for the
     IL nearshore waters.
Small Craft Advisory from 3 AM to 1 PM CDT Saturday for the IN
     nearshore waters.
&&
$$
Visit us at weather.gov/chicago

NWS LOT Office Area Forecast Discussion