121
FXUS63 KIWX 272149
AFDIWX

Area Forecast Discussion
National Weather Service Northern Indiana
549 PM EDT Fri Jun 27 2025

.KEY MESSAGES...

- Isolated showers and storms possible tonight.

- Heat and humidity returns on Sunday after a brief reprieve
  Saturday.

- Showers and thunderstorms likely on Monday.

- More seasonable temperatures and lower humidity values
  expected Tuesday and beyond.

&&

.UPDATE...
Issued at 548 PM EDT Fri Jun 27 2025

Severe Thunderstorm Watch has been cancelled as earlier
convection quickly became outflow dominant and fell apart with
eastward progression. Still have the main frontal boundary to
drop southeast through the area tonight which could still spark
a few non-severe showers or storms along it. A brief break from
the heat/humidity post-frontal otherwise tomorrow.

&&

.DISCUSSION...
Issued at 1221 PM EDT Fri Jun 27 2025

A weakening cold front will eventually continue to work its way
through the area today. Additional showers and thunderstorms
will be expected (60-80% chance) as this front moves through the
area. In the warm sector, similar atmospheric conditions (as
far as CAPE/Shear goes) will be in place across the warm sector
today like we saw yesterday. Forcing along and ahead of the
front as it moves through will be the focus for storms, however,
like we saw yesterday bubbly convection might get going at any
time once convective temperatures are reached. Visible
satellite imagery as of 1145am already suggests CU field is
developing across the SE half of the forecast area. Strong/gusty
winds, heavy rain, and frequent lightning will continue to be
the main threats - although like we saw yesterday some small
hail can`t be ruled out with the more robust updrafts. With
large low-level lapse rates and elevated DCAPE values, localized
strong to severe wind gusts will be the main issue. By
Saturday, temperatures will have "cooled" down slightly into the
low-mid 80s. Rain chances across the southern portion of the
CWA has backed off a bit, so we may have a relatively dry
Saturday after all.

Warmer temperatures return Sunday. However, surface high
pressure building over the Central Plains and troughiness
returning to Ontario/Great Lakes region which will cool us down
a little bit for the first couple of July days, especially after
another front moves through the area on Monday. The associated
shortwave will bring widespread rainfall to the region on
Monday. Hopefully the return of dewpoints back in the 60s
compared to the 70s we`ve been experiencing will be a welcome
relief.

&&

.AVIATION /00Z TAFS THROUGH 00Z SATURDAY EVENING/...
Issued at 548 PM EDT Fri Jun 27 2025

Cold front to slide through KSBN this evening and KFWA overnight
with a low (20%) for an isolated shower or storms along it. VFR
with light winds otherwise through the period outside of any
shower activity.

&&

.IWX WATCHES/WARNINGS/ADVISORIES...
IN...Heat Advisory until 8 PM EDT this evening for INZ027-034.
OH...Heat Advisory until 8 PM EDT this evening for OHZ001-002-004-
     005-015-016-024-025.
MI...None.
MARINE...None.

&&

$$

UPDATE...Steinwedel
DISCUSSION...Norman
AVIATION...Steinwedel