428
FXUS63 KIWX 300755
AFDIWX

Area Forecast Discussion
National Weather Service Northern Indiana
355 AM EDT Wed Sep 30 2026

.KEY MESSAGES...

- Increasing chances (40-80%) for showers today along and mainly
  north of US 24 , best potential will remain near Lake MI in
  the mid-late afternoon. Highs will be in the upper 60s, low
  70s for those areas. South of US 24 expect highs in the mid-
  upper 70s with increasing clouds.

- Rain chances (40-90%) spread eastward through Friday, with
  isolated thunderstorm potential (non-severe). Highs will be in
  the 70s, low 80s on Thursday and the 60s Friday.

- Dry conditions are expected this weekend into early next
  week, with highs in the 60s, low 70s (warmest further south).
  Overnight lows will drop into the 40s.

&&

.DISCUSSION...
Issued at 345 AM EDT Wed Sep 30 2026

Not a whole lot of changes to the going forecast. Rain showers
continue over northern IL into central MI this morning with the
band of showers on the northwest periphery of ridging further
south and east which will mainly keep the introduction of rain
showers for areas closer to Lake Michigan into this afternoon
as the lower levels further moisten. WPC has a marginal risk for
excessive rainfall for later today and as the ridging pushes
further south and east rain showers will make their way further
south and east through Friday morning with a slight risk for
excessive rainfall for tomorrow. A few embedded thunderstorms
will be possible with the southern and eastward push but at this
time severe weather is not anticipated.

A more zonal aloft pattern emerges across the region this
weekend and will bring a return to dry conditions and cooler
temperatures especially into the beginning of next week when
highs will only get to around 60 degrees both Monday and
Tuesday.

&&

.AVIATION /06Z TAFS THROUGH 06Z THURSDAY/...
Issued at 130 AM EDT Wed Sep 30 2026

Light rain showers currently observed on latest radar imagery
just to the northwest of the CWA over northern IL and pushing
slowly northeastward into central MI. These showers are on the
northwestern periphery of ridging in place further south and
east. Showers look to remain light as the showers push further
southward over mainly areas near Lake Michigan and into KSBN, so
at this time think conditions will mainly remain VFR however
some slight reductions in vsbys due to rain showers may allow
for MVFR vsbys but at this time confidence remains low. At this
time KFWA looks to remain dry with the ridging in place over
south and eastern portions of the CWA.

&&

.IWX WATCHES/WARNINGS/ADVISORIES...
IN...None.
OH...None.
MI...None.
MARINE...None.

&&

$$

DISCUSSION...Andersen
AVIATION...Andersen