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Portage, 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: 2:46 am EDT Apr 25, 2025
 
Overnight

Overnight: Mostly cloudy, with a low around 58. Calm wind.
Mostly Cloudy

Friday

Friday: A slight chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm.  Mostly cloudy, with a high near 72. South wind 5 to 10 mph becoming west in the afternoon.  Chance of precipitation is 60%.
Slight Chance
T-storms then
Showers
Likely
Friday
Night
Friday Night: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am.  Mostly cloudy, with a low around 41. Northwest wind around 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 30%.
Chance
T-storms then
Slight Chance
Showers
Saturday

Saturday: Mostly sunny, with a high near 54. North wind 10 to 15 mph, with gusts as high as 25 mph.
Mostly Sunny

Saturday
Night
Saturday Night: Mostly clear, with a low around 36. Northwest wind 5 to 10 mph becoming light north  after midnight.
Mostly Clear

Sunday

Sunday: Sunny, with a high near 66.
Sunny

Sunday
Night
Sunday Night: Mostly clear, with a low around 48.
Mostly Clear

Monday

Monday: Mostly sunny, with a high near 77.
Mostly Sunny

Monday
Night
Monday Night: A 40 percent chance of showers and thunderstorms after 2am.  Mostly cloudy, with a low around 67.
Mostly Cloudy
then Chance
Showers
Lo 58 °F Hi 72 °F Lo 41 °F Hi 54 °F Lo 36 °F Hi 66 °F Lo 48 °F Hi 77 °F Lo 67 °F

 

Overnight
 
Mostly cloudy, with a low around 58. Calm wind.
Friday
 
A slight chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 72. South wind 5 to 10 mph becoming west in the afternoon. Chance of precipitation is 60%.
Friday Night
 
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 41. Northwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Saturday
 
Mostly sunny, with a high near 54. North wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday Night
 
Mostly clear, with a low around 36. Northwest wind 5 to 10 mph becoming light north after midnight.
Sunday
 
Sunny, with a high near 66.
Sunday Night
 
Mostly clear, with a low around 48.
Monday
 
Mostly sunny, with a high near 77.
Monday Night
 
A 40 percent chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 67.
Tuesday
 
A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 79. Chance of precipitation is 70%.
Tuesday Night
 
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.
Wednesday
 
A 20 percent chance of showers. Partly sunny, with a high near 63.
Wednesday Night
 
A slight chance of showers. Mostly cloudy, with a low around 47.
Thursday
 
A chance of showers. Mostly cloudy, with a high near 67.

 

Forecast from NOAA-NWS for South Bend IN.

Weather Forecast Discussion
774
FXUS63 KIWX 250522
AFDIWX

Area Forecast Discussion
National Weather Service Northern Indiana
122 AM EDT Fri Apr 25 2025

.KEY MESSAGES...

- Increasing chances (20-30%) for showers and thunderstorms
  later tonight through Friday morning.

- Showers and thunderstorms will be most widespread Friday
  afternoon and evening (70% chance).

- Cool on Saturday with highs near 60 but becoming very warm
  thereafter.

&&

.DISCUSSION...
Issued at 215 PM EDT Thu Apr 24 2025

High pressure overhead suppresses rain chances for this afternoon and
early this evening. Large dew point depressions of 30 degrees are
noted at many stations. Moisture advection is underway, however,
along the Ohio River valley where dew points are in the 60s. This
airmass lifts north through the remainder of the day on the westward
edge of a Southeast US Ridge. RH values improve through the column
overnight, primarily after 2am EDT which is when the chance for
isolated and showers and thunderstorms enters the forecast. CAMs are
incredibly varied in their coverage of showers and storms, likely
owing to weak forcing beyond the implied warm front. Upper-level
forcing improves after daybreak Friday as the Canadian trough nears
and surface low pressure over the Plains arrives. Forecast soundings
are generally unimpressive, mainly due to a lack of shear. Thus,
severe weather is not anticipated Friday. Remaining mild with highs
well into the 70s.

A cold front moves through overnight Friday and any lingering
showers and storms will depart after daybreak Saturday. Relatively
cool with highs only near 60 (cooler lakeside) followed by lows
Saturday night in the upper-30s. Dew point depressions may be large
enough to fend off frost.

The next item of interest is the chance of thunderstorms Tuesday.
Cluster analysis reveals differing speeds and strength of a positive-
tilt 500mb trough moving across the northern states. While the
trough is somewhat broad, the 500-mb wind field is favorable locally
with our area residing near the right entrance region. Pre-frontal,
early-day convection could muddy the waters here; something that
won`t be resolved until 24-hours in advance. Initial mesoscale
ingredients appear favorable for severe thunderstorms, but with 16-
20+ model cycles to go until Tuesday evening, plenty of time to
monitor the trends in guidance.

&&

.AVIATION /06Z TAFS THROUGH 06Z SATURDAY/...
Issued at 122 AM EDT Fri Apr 25 2025

VFR conditions will persist through the morning with abundant
mid/upper level clouds thanks to approaching shortwave. Marginal
instability in a moist environment will support numerous showers
and storms by the afternoon. There remains a lot of uncertainty
in the timing with storms possible as early as 16Z and as late
as 01Z. Kept TEMPO TSRA mention in the middle which has the best
support among hi-res guidance (19-23Z). MVFR (possibly IFR)
stratus will then build south Friday night given increasing
postfrontal CAA and plenty of residual boundary layer moisture.

&&

.IWX WATCHES/WARNINGS/ADVISORIES...
IN...None.
OH...None.
MI...None.
MARINE...Small Craft Advisory from 5 PM this afternoon to 8 PM EDT
     Saturday for LMZ043-046.

&&

$$

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






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