906
FXUS63 KIWX 080523
AFDIWX

Area Forecast Discussion
National Weather Service Northern Indiana
123 AM EDT Tue Jul 8 2025

.KEY MESSAGES...

- Beach Hazards Statement is in effect through 10 pm EDT this
  evening for southern Lake Michigan beaches.

- Dry and less humid into Tuesday with highs in the mid 80s.

- Daily, mainly diurnally driven, shower/storm chances Wednesday
  through this weekend amid humid and warm conditions, best
  chances (60%) during the afternoon hours on Saturday.

&&

.DISCUSSION...
Issued at 215 PM EDT Mon Jul 7 2025

Widely scattered showers remain possible through the late afternoon
hours near a weak front and lingering moisture axis for locations
mainly along and southeast of US 24. Dry and less humid otherwise
into tonight and Tuesday as the entire forecast area briefly
receives influence from a low level ridge folding east through the
central and eastern Great Lakes.

A low amplitude shortwave, embedded in weak zonal flow, looks to
track east through the area late Tuesday night into Wednesday with a
renewed surge of low level theta-e. Forcing/flow is once again on
the weak side with better shower/storm chances (30-50%) relegated
to the afternoon hours near any outflow/lake breeze boundaries.
Similar conditions on Thursday, though this time with diminished
moisture quality and no obvious impulses aloft...thus lower PoPs
(20-30%) for a diurnally driven shower/storm near any outflow
boundary or in regions of greater differential heating. Near to
slightly above normal temps and humidity levels for July otherwise
with the bulk of the period(s) dry.

Ensemble guidance has remained consistent in a Gulf of Alaska
upper-level trough diving southeast toward the north-central
US. This feature will also help kick an upper low off the
California coast east toward the western Great Lakes by later
Friday into Saturday. These features could come together to
provide episodic convective events across the Midwest later Friday
into Saturday, with Saturday appearing to the best opportunity
for thunderstorms locally.

&&

.AVIATION /06Z TAFS THROUGH 06Z WEDNESDAY/...
Issued at 117 AM EDT Tue Jul 8 2025

Still fairly moist low levels with dew point depressions from 3
to 6 degrees currently, the lower being at KFWA which seems to
have the better chance of vsbys lowering to IFR however still
could see MVFR/IFR vsbys for KSBN even though a tad drier at
that site but could see the better cooling overnight there to
help develop mist. Otherwise, VFR conditions through the
remainder of the TAF period with light variable to southwesterly
winds.

&&

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

&&

$$

DISCUSSION...Steinwedel
AVIATION...Andersen