Portage, Michigan 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
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NWS Forecast for Portage MI
National Weather Service Forecast for:
Portage MI
Issued by: National Weather Service Grand Rapids, MI |
Updated: 3:03 am EDT Jun 28, 2025 |
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Overnight
 Mostly Clear
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Saturday
 Sunny
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Saturday Night
 Mostly Clear
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Sunday
 Hot
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Sunday Night
 Chance T-storms
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Monday
 Showers
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Monday Night
 Showers then Mostly Clear
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Tuesday
 Sunny
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Tuesday Night
 Mostly Clear
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Lo 68 °F |
Hi 82 °F |
Lo 65 °F |
Hi 90 °F |
Lo 70 °F |
Hi 85 °F |
Lo 63 °F |
Hi 81 °F |
Lo 63 °F |
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Overnight
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Mostly clear, with a steady temperature around 68. West northwest wind around 5 mph. |
Saturday
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Sunny, with a high near 82. Light west northwest wind increasing to 5 to 9 mph in the morning. |
Saturday Night
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Mostly clear, with a low around 65. Light and variable wind. |
Sunday
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Sunny and hot, with a high near 90. Southwest wind 3 to 7 mph. |
Sunday Night
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A 40 percent chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 70. South southwest wind 3 to 5 mph. |
Monday
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Showers and thunderstorms likely, then showers and possibly a thunderstorm after 11am. High near 85. Chance of precipitation is 80%. |
Monday Night
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Showers before 8pm. Low around 63. Chance of precipitation is 80%. |
Tuesday
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Sunny, with a high near 81. |
Tuesday Night
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Mostly clear, with a low around 63. |
Wednesday
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Sunny, with a high near 84. |
Wednesday Night
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Partly cloudy, with a low around 63. |
Thursday
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Mostly sunny, with a high near 84. |
Thursday Night
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Mostly clear, with a low around 61. |
Independence Day
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Mostly sunny, with a high near 86. |
Forecast from NOAA-NWS
for Portage MI.
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Weather Forecast Discussion
331
FXUS63 KGRR 280550
AFDGRR
Area Forecast Discussion
National Weather Service Grand Rapids MI
150 AM EDT Sat Jun 28 2025
.KEY MESSAGES...
- Strong to Severe Storms into this Evening
- Cooler and Drier Saturday then Warmer and Wetter Sunday and
Monday
- Fair and Drier Tuesday through Thursday
&&
.DISCUSSION...
Issued at 253 PM EDT Fri Jun 27 2025
- Strong to Severe Storms into this Evening
A line of strong storms that initiated along a horizontal roll
circulation this afternoon is expected to continue propagating
east and expand northeast through early evening before departing
the eastern zones later this evening. Despite moving into and area
of higher instability with CAPE of 1500 to 1800 j/kg, only modest
strengthening is expected as deep layer shear is relatively weak
and has so far precluded organized, sustained updrafts.
Main threats will be isolated downburst winds over 60 mph and hail
near 1 inch in diameter.
- Cooler and Drier Saturday then Warmer and Wetter Sunday and
Monday
Cold front moving through overnight will usher in a welcome
change of airmass with the oppressive 70 degree dew points
dropping into the comfortable range of upper 50s to lower 50s dew
points for Saturday and Saturday night. This will be a brief
respite as return flow is already setting up ahead of a shortwave
trough embedded in zonal flow moving from the Plains into the
Great Lakes. Dew points surge back into the 70s by late Sunday
into Monday with a cold front arriving by afternoon.
Instability is sufficient for enhanced thunderstorm coverage but
deep layer shear is once again limited, only around 20 to 25
knots, so storm mode may be of the pulse variety.
- Fair and Drier Tuesday through Thursday
Another cold front moves through Monday night and this will bring
a longer stretch of comfortable temperatures and dew points
lasting through Thursday. The long range indications are for
shower/thunder chances on the 4th, but confidence remains low at
this time.
&&
.AVIATION /06Z TAFS THROUGH 06Z SUNDAY/...
Issued at 150 AM EDT Sat Jun 28 2025
Limited aviation concerns the next 24 hours with VFR weather in
place at 06Z and VFR weather forecast through the TAF period.
The only real threat to VFR weather in the TAF period is early
this morning as some stratocumulus is being produced near and
behind a cold front that stretches from near Lansing to Battle
Creek at 06Z. The front will move to the east of the TAF sites in
the next hour or two. Through 13Z there is a possibility some of
these clouds could dip into the MVFR category, but the threat was
too small to include at this time.
Otherwise, with high pressure settling into the area we are
expecting mainly clear skies and VFR conditions. Winds will be
from the west both early this morning and through the day at 5 to
10 knots. Winds will become light and variable at 01Z this
evening.
&&
.MARINE...
Issued at 157 PM EDT Fri Jun 27 2025
We`ll be watching showers and thunderstorms develop this afternoon
mainly south of MKG as a cold front moves east. Waves will
generally be around a foot through Sunday. However, north of MKG,
waves will build to 2-3 feet by Sunday afternoon.
&&
.GRR WATCHES/WARNINGS/ADVISORIES...
MI...None.
MARINE...None.
&&
$$
DISCUSSION...Ostuno
AVIATION...Duke
MARINE...04
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