Ladoga, Indiana Weather Forecast Discussion

548
FXUS63 KIND 260700
AFDIND
Area Forecast Discussion
National Weather Service Indianapolis IN
300 AM EDT Fri Sep 26 2025
.KEY MESSAGES...
- Locally Dense Fog through 900 AM this morning, across mainly northern
  zones...with visibility reductions also over central counties
- An otherwise lovely early autumn day today...clear skies this
  afternoon, highs 76-80F
- Dry and unseasonably warm this weekend into next week, highs in
  80s through Tuesday
&&
.SHORT TERM (Today and tonight)...
Issued at 300 AM EDT Fri Sep 26 2025
The main impact in the short term will be the development of fog
over the next several hours through this morning. Broad subsidence
has cleared out skies, with surface temperatures quickly falling
towards saturation. Model soundings continue to show a saturated
near surface layer under a shallow inversion through the morning
hours, especially across the northern half of central Indiana. Given
calm winds and an uniform dew point gradient, there likely wont be
dense fog in all locations across central Indiana, but any low lying
valleys or waterways are likely to fog up quickly over the next few
hours. Given the likely patchy nature of this fog, it should take
long for surface heat fluxes to aid in mixing of the PBL and fog
dissipation by mid morning, but trends will have to be monitored for
possible changes in coverage over mesoscale areas.
For the rest of the day, there should be enough lingering moisture
within the boundary layer will likely support establishment of a
scattered cu field for the afternoon. Temperatures should remain
stagnant from yesterday with highs in the mid to upper 70s. Ridging
continues to build in throughout the day with a slow push of warmer
temperatures for tonight into tomorrow.
&&
.LONG TERM (Saturday through Thursday)...
Issued at 300 AM EDT Fri Sep 26 2025
Dry and warm pattern to prevail through the entire long term as
central Indiana finds itself situated on the southeastern edge of an
amplified subtropical upper ridge...which will steadily build from
the central CONUS up to Hudson Bay over the 6 day period.  Stagnant
upper trough contributing the southeastern corner to this overall
omega-type block pattern...will spin about its center which should
remain near the Smoky Mountains...with a weak/small Atlantic
tropical wave likely tracking from the Carolina coast into this
upper trough in the second half of the period.
Broad but weak surface high pressure over much of the central to
eastern US will be rearranged by the building upper ridge...to an
alignment from the Great Lakes to New England by early next week.
This will keep the local region under light northerly winds through
the weekend that will do little to counter H500 thicknesses as high
as 572 dm, with unseasonable afternoon highs about 10 degrees above
normal.  Mainly clear skies will promote large diurnal ranges, with
lows under 60F.
THe middle of next week will have a couple factors worth watching,
as the amplifying upper ridge should help direct the southern
extents of much cooler Canadian high pressure across the Great Lakes
and into the CWA...providing moderate east-northeasterly breezes
that would promote only slightly above normal afternoons by
Wednesday.  Meanwhile, despite decent agreement in the small
tropical wave being ingested into the southeastern trough...appears
cyclonic flow around this feature should keep any showers south of
the Ohio River, although moderate humidity may return to southern
most counties.  Should the formidable Canadian surface high make a
greater plunge southward, associated isentropic lift might lead to
low chances of RWs, but confidence for this potential is low.
&&
.AVIATION (06Z TAF Issuance)...
Issued at 1239 AM EDT Fri Sep 26 2025
Impacts:
-Brief LIFR conditions due to FG 08Z to 13Z
Discussion:
VFR conditions expected through the TAF period outside of a period
of IFR to LIFR cigs/vsbys as fog develops across central Indiana.
Confidence in the fog is highest at LAF with lower potential for HUF
and BMG. The timeline for fog looks to be as early as 08Z but most
likely in the 11-13Z timeframe. Winds will remain light and variable
through the TAF period with a predominately northerly direction.
&&
.IND WATCHES/WARNINGS/ADVISORIES...
Dense Fog Advisory until 9 AM EDT this morning for INZ021-
028>031-035>042-046>049-056-057-065.
&&
$$
SHORT TERM...Updike
LONG TERM...AGM
AVIATION...Updike

NWS IND Office Area Forecast Discussion