057
FXUS63 KIND 080317
AFDIND

Area Forecast Discussion
National Weather Service Indianapolis IN
1117 PM EDT Tue Oct 7 2025

.KEY MESSAGES...

- Becoming mostly clear overnight

- Potential for frost threat Wednesday and Thursday nights with lows
  expected to be in the upper 30s

- A return to prolonged dry weather mid week onward, accompanied by
  gradually warming temperatures

&&

.FORECAST UPDATE...
Issued at 929 PM EDT Tue Oct 7 2025

The cold front has exited central Indiana, taking the scattered
showers and isolated thunderstorms with it. A few sprinkles were
near the northeastern forecast area earlier this evening, but these
haven`t appeared on surface observations recently. Clearing had
occurred across the far northwestern forecast area.

As drier air continues to advect in from the north, clouds will
gradually clear from north to south. Wouldn`t rule out a sprinkle
before that occurs, especially northeast, but odds are too low to
mention.

Removed any mentionable PoPs. Adjusted sky cover based on latest
satellite images but overall trend is good. Also adjusted hourly
temperatures based on observations, but forecast low temperatures
look good.

&&

.SHORT TERM (This evening through Wednesday night)...
Issued at 305 PM EDT Tue Oct 7 2025

Upper-level analysis shows a large but fast-moving trough over the
Midwest. A mid-level disturbance is located at the base of the
trough over western KY into southern Indiana. This feature is
beginning to accelerate northeastward as interaction with the larger
trough begins to take hold. At the surface, a cold front extends
across central Indiana from about Bloomington to Shelbyville to
Muncie, moving southeastward. Until recently, shower activity
associated with the front was largely disconnected from the shower
activity associated with the mid-level disturbance to our south. The
gap is beginning to fill in as the faster-moving front is now
catching up to the disturbance.

Going forward, shower activity is anticipated to continue through
the afternoon along and ahead of the cold front. A few thunderstorms
are possible as well, though thermal profiles are not overly
unstable at the moment. Thunder should be isolated to scattered at
best. Temperatures are slowly climbing into the low 70s as of 1pm,
with dew points in the mid to upper 60s. Despite poor lapse rates,
the deep moisture profile combined with the high freezing level has
lead to efficient rainfall production today. Heavy rain is possible,
but flooding potential will remain low due to antecedent dry
conditions.

Once the front clears the area tonight, cool dry air will filter in
from the north. Surface high pressure of around 1030mb is modeled to
arrive tomorrow and persist through the remainder of the week. Broad
subsidence will lead to clear skies and light winds, which is ideal
for nocturnal radiative cooling potential. Guidance is in good
agreement that the next few nights will be the coldest of the season
so far. There may be enough wind, however, to prevent fog tonight in
combination with dry air advection. Rural areas may dip into the 40s
tonight with 30s possible tomorrow night. As for highs, temperatures
may struggle to climb out of the 60s tomorrow.

&&

.LONG TERM (Thursday through Tuesday)...
Issued at 305 PM EDT Tue Oct 7 2025

The long term will likely be dry for most of the period while
temperatures go from below normal then warm to above normal by next
week.

Ridging aloft will be progressing eastward across the CONUS through
next week with high pressure and subsidence persisting at the
surface. Models are showing a possible upper level low forming over
the Great Lakes this weekend, which could bring rain to parts of the
region. High pressure over central Indiana should keep away any rain
for us but can`t completely rule out a few sprinkles at some point,
mainly across the north.

While models get noisy going into next week and beyond, there is a
consensus for a slowly approaching trough system will be the next
best shot at rain chances. Still unsure on timing, but the earliest
rain may arrive would be mid-next week. Latest guidance has further
lowered the PoPs it had in previously, leaving only minimal chances
for the tail end of the forecast period. Thus, dry conditions return
and persist for the period.

Temperatures will start off with highs in the 60s, warming back into
the 70s to near 80 by the start of next week. Wednesday night and
Thursday night, lows are expected to be in the upper 30s, and thus
there could be a threat for some frost those nights. Lows the
remainder of the period will then quickly return to upper 40s to
50s.

&&

.AVIATION (06Z TAF Issuance)...
Issued at 1116 PM EDT Tue Oct 7 2025

Impacts:

- VFR conditions this TAF period.

Discussion:

Strong high pressure over the upper midwest will build across
Indiana and the TAF sites through the period. GOES19 shows clear
skies upstream of the TAF sites and these are expected to rapidly
build across the forecast area and persist through the next 24-30
hours.

Forecast soundings show a very dry column in place through Friday
morning as the surface high and ridging aloft move through the area.

&&

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

$$

UPDATE...50
SHORT TERM...Eckhoff
LONG TERM...KF
AVIATION...Puma