853
FXUS63 KIND 261037
AFDIND

Area Forecast Discussion
National Weather Service Indianapolis IN
637 AM EDT Mon Oct 26 2026

.KEY MESSAGES...

- Dry with above normal temperatures through at least Friday,
  afternoon highs in the 70s

- Patchy fog may occur in low lying areas late night/early mornings

- Showers may return for the Halloween weekend and/or next week

&&

.DISCUSSION (Today through Sunday)...
Issued at 329 AM EDT Mon Oct 26 2026

Rather complex yet quasi-stagnant synoptic pattern over North
America throughout this weekend will feature broad cut-off H500
trough over Pacific Northwest/BC and more progressive but overall
retracted polar waves from interior Canada to New England.  Between
these northern features upper ridging will attempt to establish over
the majority of CONUS...yet will be dampened by at least a couple
weaknesses lifting from southern High Plains to Great Lakes.  These
less intense waves will combine with broadening surface high
pressure over the eastern US to advect fetch of Gulf moisture from
southern Plains to near IA/IL.

This will translate to much of the same conditions recently seen
across central Indiana...rain-free weather under generally stacked
high pressure through Wednesday...as readings ranging from the 40s/
around 50F to afternoons peaking near 70-75F.  Remnant surface high
centered to our southeast will be replaced by stronger air mass
crossing Ontario into Tuesday...that will ultimately set up in the
same general proximity over the country`s eastern third by Tuesday
night, albeit now with a seasonably strong gradient.  Therefore
expect typical October breeze finally returning to central Indiana
for Wednesday/Thursday afternoons...when south-southwesterly gusts
to 10-20 mph will yield highs in the mid-/upper 70s, respectively.
(Thursday`s record high at Indianapolis is 81, 1922).  Considerable
cloudiness also expected late Tuesday-early Wednesday from first,
smaller southern wave lifting to our west...with high confidence dry
column will continue dry conditions.

Second, broader weakness lifting across region this weekend will
bring moderate certainty in scattered/numerous rain showers...
assuming northern stream wave dives far enough south near Cape Cod
to provide downstream confluence and prolong advection of better
Gulf moisture north of the Ohio Valley around the Saturday night to
Sunday timeframe.  Timing of onset of showers would likely be around
Halloween evening...although more organized rain coverage would be
favored towards Sunday.  Indianapolis is progged for a streak of 13
consecutive days with highs in the 70s through November 1st.  The
normal max/min at Indianapolis through the forecast period falls
from 61/42 today...to 58/40 on Sunday.

&&

.AVIATION (12Z TAF Issuance)...
Issued at 635 AM EDT Mon Oct 26 2026

Impacts:

- MVFR/worse visibility possible amid ground fog 09-13Z this morning
  at outlying terminals
- Light winds likely veering at KLAF to northerly this afternoon

Discussion:

Patchy ground fog will likely bring quasi-transient MVFR, and
possibly brief IFR mainly after 09Z...and before 13Z this morning at
KLAF/KHUF.  VFR is expected to otherwise prevail near central
Indiana terminals through at least 06Z Tuesday morning.

Stacked ridging over southeastern third of the CONUS will shift
southward as stronger surface high slides across Canada border/
Great Lakes through the TAF period.  This will bring increased
coverage of high/mid cloud today through the early evening,
especially at KLAF.

Weak gradient around fading surface high pressure centered near the
southern Appalachians will maintain very light winds.  Flow at most
terminals is expected to veer within 180-250 degrees through 20Z
today, sustained under 7KT.  Subtle boundary ahead of northern air
mass will likely pass KLAF, veering winds through midday to more
northerly by 18Z...sustained up to 7KT.

&&

.IND WATCHES/WARNINGS/ADVISORIES...None.

&&

$$

AVIATION...AGM
DISCUSSION...AGM