Sanford Lake, Indiana Weather Forecast Discussion

238
FXUS63 KIWX 260500
AFDIWX
Area Forecast Discussion
National Weather Service Northern Indiana
100 AM EDT Fri Sep 26 2025
.KEY MESSAGES...
- Patchy fog, locally dense, possible early Friday morning.
- Extended period of dry weather and sunshine Friday through at
  least the middle of next week.
&&
.DISCUSSION...
Issued at 218 PM EDT Thu Sep 25 2025
Upper trough swinging through in cyclonic flow will generate a few
showers this afternoon into early this evening given lingering
boundary layer moisture and weak diurnal instability. This trough
axis exits off to the east tonight into Friday with heights on the
rise with a drier/subsident air mass filtering in. Otherwise,
clearing skies and light winds may allow for some patchy
fog/stratus to develop overnight into early Friday as the near
sfc layer will be slower to dry out.
A stretch of pleasant (dry/warmer) weather then settles in Friday
through at least the middle of next week. Upper ridging building
east from the Canadian Prairies/Northern Plains to the Great
Lakes and Ontario in a pseudo omega block pattern will provide
this quiet wx pattern locally.
&&
.AVIATION /06Z TAFS THROUGH 06Z SATURDAY/...
Issued at 1257 AM EDT Fri Sep 26 2025
Minimal changes needed for the 06Z TAF issuance. Patchy dense
fog has developed across northwest Indiana over the past 1-2
hours and is expected to become more widespread towards
daybreak. Visibilities will be highly variable, as evidenced by
the fact that KSBN dropped to 2 miles visibility with fog within
the past hour and is now back up to 10 miles. With clear skies,
increased radiational cooling will allow for more fog to
develop, particularly between 09-13Z. IFR to potentially LIFR
visibilities as possible area-wide, including at the terminals,
although confidence is low as to where the lowest visibilities
will occur. Fog will dissipate 1-2 after sunrise. A dry day is
ahead with light southwesterly winds and VFR ceilings.
&&
.IWX WATCHES/WARNINGS/ADVISORIES...
IN...None.
OH...None.
MI...None.
MARINE...None.
&&
$$
DISCUSSION...Steinwedel
AVIATION...Johnson

NWS IWX Office Area Forecast Discussion