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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: 4:01 pm EDT Jun 26, 2025
 
This
Afternoon
This Afternoon: Scattered showers and thunderstorms.  Partly sunny and hot, with a high near 91. Heat index values as high as 96. Southwest wind around 5 mph.  Chance of precipitation is 40%.
Scattered
T-storms

Tonight

Tonight: Scattered showers and thunderstorms, mainly before 10pm.  Partly cloudy, with a low around 74. South wind around 5 mph.  Chance of precipitation is 30%.
Scattered
T-storms

Friday

Friday: Scattered showers and thunderstorms, mainly after 2pm.  Mostly sunny and hot, with a high near 90. Heat index values as high as 96. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.  Chance of precipitation is 50%.
Mostly Sunny
then
Scattered
T-storms
Friday
Night
Friday Night: Scattered showers and thunderstorms, mainly before 9pm.  Mostly cloudy, with a low around 68. Northwest wind around 5 mph.  Chance of precipitation is 30%.
Scattered
T-storms then
Mostly Cloudy
Saturday

Saturday: Mostly sunny, with a high near 84. Calm wind becoming northwest around 5 mph in the afternoon.
Mostly Sunny

Saturday
Night
Saturday Night: Mostly clear, with a low around 66.
Mostly Clear

Sunday

Sunday: Sunny and hot, with a high near 91.
Hot

Sunday
Night
Sunday Night: A 40 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 71.
Chance
T-storms

Monday

Monday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm.  Partly sunny, with a high near 87. Chance of precipitation is 60%.
Chance
T-storms then
Showers
Likely
Hi 91 °F Lo 74 °F Hi 90 °F Lo 68 °F Hi 84 °F Lo 66 °F Hi 91 °F Lo 71 °F Hi 87 °F

Hazardous Weather Outlook
Heat Advisory
 

This Afternoon
 
Scattered showers and thunderstorms. Partly sunny and hot, with a high near 91. Heat index values as high as 96. Southwest wind around 5 mph. Chance of precipitation is 40%.
Tonight
 
Scattered showers and thunderstorms, mainly before 10pm. Partly cloudy, with a low around 74. South wind around 5 mph. Chance of precipitation is 30%.
Friday
 
Scattered showers and thunderstorms, mainly after 2pm. Mostly sunny and hot, with a high near 90. Heat index values as high as 96. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.
Friday Night
 
Scattered showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 68. Northwest wind around 5 mph. Chance of precipitation is 30%.
Saturday
 
Mostly sunny, with a high near 84. Calm wind becoming northwest around 5 mph in the afternoon.
Saturday Night
 
Mostly clear, with a low around 66.
Sunday
 
Sunny and hot, with a high near 91.
Sunday Night
 
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Monday
 
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 87. Chance of precipitation is 60%.
Monday Night
 
Showers likely and possibly a thunderstorm before 8pm, then a slight chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 67. Chance of precipitation is 60%.
Tuesday
 
Sunny, with a high near 83.
Tuesday Night
 
Mostly clear, with a low around 64.
Wednesday
 
Sunny, with a high near 85.
Wednesday Night
 
Mostly clear, with a low around 63.
Thursday
 
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84.

 

Forecast from NOAA-NWS for South Bend IN.

Weather Forecast Discussion
796
FXUS63 KIWX 261755
AFDIWX

Area Forecast Discussion
National Weather Service Northern Indiana
155 PM EDT Thu Jun 26 2025

.KEY MESSAGES...

- Hot and humid conditions continue today resulting in a High
  heat risk.

- Marginal Risk of severe thunderstorms through this evening
  with strong gusty winds and excessive rainfall the main
  threats.

- Slightly more mild temperatures on Saturday before a brief
  warm up again on Sunday and Monday.

&&

.DISCUSSION...
Issued at 151 PM EDT Thu Jun 26 2025

Another hot and humid day with highs topping out around 90
degrees and heat indicies near 100 after you combine in the
humidity. Sensitive populations should continue to take extra
precautions against the heat. Moderate to strong instability
and PWAT around 1.6in will promote convection through the rest
of the afternoon, as we have already begun to see late morning
and early afternoon across the Michiana region. Weak overall
shear will inhibit sustained updrafts, and storms should be
pulse-like with strong gusty outflow winds being the predominant
threat (in addition to lightning and localized heavy rain, of
course).

A cold front will eventually work its way into the area on
Friday. Additional showers and storms will be expected (60-70%
chance) as this front moves through the area. By Saturday,
temperatures will have "cooled" down slightly into the low-mid
80s. Rain chances favor the southern half of our forecast area
on Sat.

Warmer temperatures return Sunday and Monday. 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. Hopefully the
return of dewpoints back in the 60s vs the 70s we`ve been
experiencing will be a welcome relief.

&&

.AVIATION /18Z TAFS THROUGH 18Z FRIDAY/...
Issued at 133 PM EDT Thu Jun 26 2025

Tstms have fired across southern MI between the I94 and I80
corridors while more widely sctd across nrn IN.This trend is
expected to continue through the rest of the aftn and evening
period, so will emphasize the SBN terminal site for convection
through 00Z. Thus far, the storms have remained below svr
criteria as they are pulse in nature. The flow is predominately
SW for both sites and will carry this into the night hours then
winds turn more southerly overnight at KSBN. The heat and
elevated humidity levels continue Friday and coupled with the
upper ridging weakening, expect a continuation of tstm
development with daytime heating.

&&

.IWX WATCHES/WARNINGS/ADVISORIES...
IN...Heat Advisory until 8 PM EDT /7 PM CDT/ this evening for
     INZ005>009-012>015-017-018-020-022>027-032>034-103-104-
     116-203-204-216.
OH...Heat Advisory until 8 PM EDT this evening for OHZ001-002-004-
     005-015-016-024-025.
MI...Heat Advisory until 8 PM EDT this evening for MIZ078>081-177-
     277.
MARINE...None.

&&

$$

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






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