Marion, Indiana 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

705
FXUS63 KIWX 111810
AFDIWX

Area Forecast Discussion
National Weather Service Northern Indiana
210 PM EDT Fri Apr 11 2025

.KEY MESSAGES...

- A hard freeze is expected tonight with widespread frost likely.

- Scattered showers and storms are possible Sunday night into Monday.

- Temperatures gradually warm through the weekend and into early
  next week.

&&

.DISCUSSION...
Issued at 208 PM EDT Fri Apr 11 2025

An area of high pressure currently centered over Wisconsin will
bring dry, mild weather to the Great Lakes region through the next
48 hours. As high pressure builds across Indiana on Friday and into
the weekend, dry conditions are expected to last through at least
Sunday afternoon. Subsidence will lead to clearing skies and light
winds tonight, which will allow for temperatures to drop below
freezing. Lows area-wide of 28-30 degrees are anticipated and there
is high confidence in widespread frost developing overnight. While
the growing season has not officially started yet, some trees and
plants may be susceptible to the cold. This is the last below-
freezing night for the next several days as temperatures will
gradually increase through the weekend as WAA ramps up. An
upper level builds across the Plains into the Midwest over the
weekend with highs in the mid to upper 60s by Sunday!

The next chance for rain arrives on Sunday night into Monday as an
area of low pressure ejects out of the Rockies and traverses the
Central Plains. A warm front should move through the area on Sunday
night, with our area well into the warm sector during the day
Monday. Highs will be in the lower 70s with chances for showers and
storms in the afternoon as the system`s attendant cold front sweeps
through. Some scattered showers could be possible Sunday
afternoon/evening (mainly north of US 6) as shear increases and
a series of shortwaves pass through Lower Michigan, however,
the better chances for rain and storms in our forecast area
will likely be on Monday with the cold front. There is still
uncertainty in the forecast as the GFS and ECMWF diverge with
respect to when and where storms develop on Monday. Right now,
the GFS has showers and storms in the late morning/early
afternoon while the ECMWF is slightly later in the afternoon (a
more favorable timeframe for severe weather). Both long range
models do depict some instability and favorable shear on Monday
afternoon, although the better environment will likely be off to
our southeast. Depending on the timing and convective
environment, thunderstorms will be possible and we can`t rule
out severe potential, especially in the far southeast portion of
our forecast area.

Dry, cooler conditions set in on Wednesday before another
system arrives Thursday and Friday of next week.

&&

.AVIATION /18Z TAFS THROUGH 18Z SATURDAY/...
Issued at 127 PM EDT Fri Apr 11 2025

A cold front sinks farther southward today allowing high pressure to
nose farther into the area. This allows for plenty of dry weather
through the taf period keeping flight conditions in VFR. Winds will
generally be out of the north and northwest with sustained winds
today around 10 kts, becoming light to calm tonight.

&&

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

&&

$$

DISCUSSION...Johnson
AVIATION...Roller