224
FXUS63 KIWX 010943
AFDIWX

Area Forecast Discussion
National Weather Service Northern Indiana
543 AM EDT Tue Jul 1 2025

.KEY MESSAGES...

- Less humid air arrives through the day with highs in the low
  to mid 80.

- Temperatures and humidity will slowly increase as we approach
  the holiday weekend with the warmest day looking to be
  Saturday when highs possibly in the 90s in some locations.

- Chances for afternoon/evening showers and thunderstorms return
  Saturday and linger through Monday.

&&

.DISCUSSION...
Issued at 339 AM EDT Tue Jul 1 2025

Cold front, located from Three Rivers, MI to Danville, IL, continues
to edge slowly east. A few higher based showers/sprinkles have begun
to develop over the last hour, but are struggling to gain any
strength/momentum. A larger area of rain/storms was moving east
across central/southern IN with lighter returns (also barely
reaching the ground) edging northeast. All of these items combined
warrant holding onto the slgt chc to chc pops through 12Z, but no
severe weather is expected and rainfall amounts are likely to be
rather minimal.

Once the front clears, upper level heights will remain on the "lower
side" into Thursday in the 580 to 584 dm range as an overall NW flow
remains in control. This will allow the hot and humid air to reside
south of the region (but not too far south) with highs still in the
80s. Heights will increase quickly to start the holiday weekend (590
to 592 dm) with 850 mb temps peaking around 20 C. This will usher in
a brief return to highs around or just above 90 for Fri and Sat.
Dewpoints will increase back into the mid to upper 60s yielding heat
indices of 95 to 100 both days. The upper ridge will flatten
somewhat thereafter pushing the 90 degree temps back south again.

With regards to rain chances, a lack of deeper moisture and clear
triggers along with weak flow should result in dry conditions until
late Saturday as a series of weak waves and a frontal boundary
meander across the region with chances for afternoon/evening showers
and storms. Model blend continues to give slgt chc pops Thurs/Fri
afternoon as the "warm front" edges north, but these are likely
overdone.

&&

.AVIATION /12Z TAFS THROUGH 12Z WEDNESDAY/...
Issued at 543 AM EDT Tue Jul 1 2025

Rain showers and the cold front have cleared KFWA. Thus, at both
sites, decreasing clouds the rest of the morning. Wind increases
toward 12 kts this afternoon with an adequate pressure gradient
from incoming Central Plains high pressure. Wind diminishes once
more after sunset.

&&

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

&&

$$

DISCUSSION...Fisher
AVIATION...Brown