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South Bend, Indiana 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for South Bend IN
National Weather Service Forecast for: South Bend IN
Issued by: National Weather Service Northern Indiana
Updated: 8:32 pm EDT Mar 30, 2025
 
Tonight

Tonight: A 10 percent chance of showers after 5am.  Mostly cloudy, with a low around 35. West wind around 15 mph, with gusts as high as 25 mph.
Mostly Cloudy
then Slight
Chance
Showers
Monday

Monday: A 10 percent chance of showers before 8am.  Cloudy, with a high near 40. Northwest wind around 15 mph, with gusts as high as 25 mph.
Slight Chance
Showers then
Mostly Cloudy
Monday
Night
Monday Night: Partly cloudy, with a low around 26. North wind 5 to 10 mph, with gusts as high as 20 mph.
Partly Cloudy

Tuesday

Tuesday: Mostly sunny, with a high near 50. East wind 5 to 10 mph.
Mostly Sunny

Tuesday
Night
Tuesday Night: Showers likely after 2am.  Mostly cloudy, with a low around 38. East wind 10 to 15 mph, with gusts as high as 30 mph.  Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Mostly Cloudy
then Showers
Likely
Wednesday

Wednesday: Showers, with thunderstorms also possible after 11am.  High near 69. Breezy.  Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Showers and
Breezy

Wednesday
Night
Wednesday Night: Showers likely and possibly a thunderstorm before 2am, then a slight chance of showers.  Mostly cloudy, with a low around 49. Chance of precipitation is 70%.
Showers
Likely

Thursday

Thursday: A slight chance of showers before 8am, then a slight chance of showers after 2pm.  Partly sunny, with a high near 62. Chance of precipitation is 20%.
Slight Chance
Showers

Thursday
Night
Thursday Night: A 20 percent chance of showers before 2am.  Mostly cloudy, with a low around 39.
Slight Chance
Showers

Lo 35 °F Hi 40 °F Lo 26 °F Hi 50 °F Lo 38 °F Hi 69 °F Lo 49 °F Hi 62 °F Lo 39 °F

 

Tonight
 
A 10 percent chance of showers after 5am. Mostly cloudy, with a low around 35. West wind around 15 mph, with gusts as high as 25 mph.
Monday
 
A 10 percent chance of showers before 8am. Cloudy, with a high near 40. Northwest wind around 15 mph, with gusts as high as 25 mph.
Monday Night
 
Partly cloudy, with a low around 26. North wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
 
Mostly sunny, with a high near 50. East wind 5 to 10 mph.
Tuesday Night
 
Showers likely after 2am. Mostly cloudy, with a low around 38. East wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
 
Showers, with thunderstorms also possible after 11am. High near 69. Breezy. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Wednesday Night
 
Showers likely and possibly a thunderstorm before 2am, then a slight chance of showers. Mostly cloudy, with a low around 49. Chance of precipitation is 70%.
Thursday
 
A slight chance of showers before 8am, then a slight chance of showers after 2pm. Partly sunny, with a high near 62. Chance of precipitation is 20%.
Thursday Night
 
A 20 percent chance of showers before 2am. Mostly cloudy, with a low around 39.
Friday
 
Mostly sunny, with a high near 55.
Friday Night
 
A 30 percent chance of showers. Mostly cloudy, with a low around 37.
Saturday
 
A 30 percent chance of showers. Partly sunny, with a high near 55.
Saturday Night
 
A slight chance of showers. Mostly cloudy, with a low around 36.
Sunday
 
A slight chance of showers. Mostly sunny, with a high near 49.

 

Forecast from NOAA-NWS for South Bend IN.

Weather Forecast Discussion
851
FXUS63 KIWX 302308
AFDIWX

Area Forecast Discussion
National Weather Service Northern Indiana
708 PM EDT Sun Mar 30 2025

.KEY MESSAGES...

- Line of thunderstorms, potentially severe, exits off to the
  east and south by 9 pm EDT this evening.

- Brief shot of cooler temperatures Monday into Tuesday.

- Another chance for strong to severe thunderstorms exists on
  Wednesday.

&&

.DISCUSSION...
Issued at 146 PM EDT Sun Mar 30 2025

An area of low pressure moves through the Great Lakes today in
conjunction with a vort max moving northeast into Central Canada. As
it does so, it pushes a 40 kt jet through the region out in front of
a cold front, modeled to push through the area by around 6z. The
best shear is forecast to reach our west between 18z and 21z this
afternoon. Initial boundary-perpendicular oriented shear is expected
to become more parallel as it shifts eastward allowing initial
cellular type to become more linear and for a hail/tornado threat to
become more of a wind/embedded tornado threat. Of note is the
effective helicity values struggling to reach 200 m2/s2 until it
reaches NW OH around 00z. Instability was considered the main
limiting factor heading into the event and scattering of clouds over
IL was a positive sign as well as the better low level lapse rates
modeled on the 12z NAM. Still looks to somewhat of a squeeze play to
try to and get the mid level lapse rates in here to help with DCAPE
and to get better hail sizes, especially if the ML Lapse rates are
going to be unmixed. Morning low cloudiness will also help keep LCLs
less than 1000m to help any embedded tornado threat. Any flooding
threat would appear to need training and the antecedent conditions
of receiving 1 to 3 inches in the Noble/DeKalb counties area as well
as urban conditions to really become much of a factor. Although
ponding could be a factor if it rains at a fast rate. There are 6
rivers in action stage as of this morning.

As the main area of low pressure moves into eastern Canada, the cold
front that caused the showers and storms across the Lower Great
Lakes and Ohio Valley this evening pushes southeast. CAA took place
overnight and 850 mb temps dropped below zero and dew points dropped
from the muggy 60s back into the drier 30s. This will allow for a
cooler day across the area for Monday as highs are back in the 40s
as opposed to the 60s and 70s we`ve seen the last few days. High
pressure pushes by to the north and mid level ridging pushes through
between Monday and Tuesday allowing some quieter clean up time.
Tuesday will be slightly warmer by a few degrees with some 50 degree
highs as warm advection ensues late afternoon with winds gaining a
southerly wind component.

Between Monday night and Tuesday, a low pressure system forms east
of the Rockies and ejects northeastward toward the western Great
Lakes Tuesday night and Wednesday. With warm advection continuing
Tuesday night, a warm front is pushed northward, but is expected to
move through by the early afternoon setting up the area in the warm
sector for thunderstorms Wednesday. Of course, one issue with this
is that convection may get in here after midnight and before sunrise
and we`ll see what that does to the eventual placement of the front.
A 40 kt low level jet was modeled for storms on Sunday, but an even
stronger 45 to 55 kt low level jet is being modeled for storms on
Wednesday. Dew points reattain 60 degrees and highs reach 70 degrees
especially south of US-6. It looks like there may be some
instability available, as long as that warm front is able to move
north through the area and this event occurs around peak heating. As
long as that`s the case and with the shear and helicity values being
modeled, this could be a potent severe weather event with all
hazards on the table. Gusty synoptic winds outside of storms will
also be possible. Flooding could be a hazard with this event given
antecedent conditions of recent rainfall, but we`ll need to see how
the basins fair and how much runoff can occur to bring rivers back
into action stage or below. Storm motions may be quick through the
area, but training of storms may become an issue with a tendency for
the front to slow down.

Between Thursday and the weekend, the front looks to stall just to
our south and east as a wave of low pressure develops along it and
rides northward. Rain looks to move back into the area Thursday,
especially south of US-24. Then, uncertainty arises as there could
be more showers that continue along a stalled boundary in the same
area into the weekend or the front may be able to push through
Friday.

&&

.AVIATION /00Z TAFS THROUGH 00Z MONDAY/...
Issued at 706 PM EDT Sun Mar 30 2025

The primary line of convection has exited the terminals to the east
and south, but there may be a few lingering showers in the vicinity
of KFWA through 02/03z. Mainly VFR with southwesterly winds to
near 12 knots otherwise this evening before MVFR cigs wrap back
in overnight into Monday morning.

&&

.IWX WATCHES/WARNINGS/ADVISORIES...
IN...None.
OH...None.
MI...None.
MARINE...Small Craft Advisory from 11 PM this evening to 5 AM EDT
     Tuesday for LMZ043-046.

&&

$$

DISCUSSION...Roller
AVIATION...Steinwedel
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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