465 FXUS63 KMQT 271622 AFDMQTArea Forecast Discussion National Weather Service Marquette MI 1222 PM EDT Sat Sep 27 2025
.KEY MESSAGES...
- A mostly dry and low impact weather pattern with near to above average temperatures holds into next week.
- Min RHs down to 30% or lower are possible Sunday and Monday afternoons in the interior west and central.
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.DISCUSSION... Issued at 1222 PM EDT Sat Sep 27 2025
As a `cold front` continues to bring a line of cloud cover from west to east across the U.P. this afternoon, expect winds to pick up a little from the west to northwest behind the frontal boundary. No rainfall is being seen with this frontal passage as the better forcing is much further north. That being said, we are still expecting temperatures to rise up into the upper 60s to even the mid 70s in the south central, even behind the `cold front` in the west. Given the dry air moving in behind the front, expect RHs to stay mainly at 40% or above in the interior areas, although a couple of spots could sneak into the mid to upper 30 percents late this afternoon.
Moving into tonight, thinking the U.P. will remain mostly cloud-free as high pressure ridging builds in. However, the NBM guidance does show some late night FG potentially sneaking into the interior west and central, so that is possible (especially considering that we had FG this morning, when it wasn`t even expected yesterday!). Overall, thinking lows will drop down into the lower 40s in the interior areas late tonight/early Sunday morning.
Expect any FG that does form to erode away by the late morning hours Sunday. Above normal temperatures look to continue next week, with highs generally being in the lower to mid 70s across the area. We could also see some RHs drop down to around 30% on Sunday and Monday, which could bring some near elevated fire weather concerns into the interior west and central; indeed some spots may get into the mid 20 percents on Sunday in the interior west. Thankfully, winds look to remain light Sunday and Monday as we remain under the influence of high pressure ridging. The high pressure ridging looks to continue until late in the week.
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.AVIATION /12Z TAFS THROUGH 12Z SUNDAY/... Issued at 743 AM EDT Sat Sep 27 2025
A brief period of LIFR/VLIFR fog will impact SAW early this morning. In addition, other impacts include a LLWS threat at CMX through mid- morning along with a wind shift from south to west. Surface wind speeds at CMX could gust to 25 to 30 kts through mid-morning. Elsewhere, IWD can also expect southwest wind gusts up to 20 kts through mid-morning. Otherwise, expect VFR conditions throughout the TAF period.
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.MARINE... Issued at 213 PM EDT Fri Sep 26 2025
Light winds of 20 knots or less continue the rest of today as high pressure moves through the region. However, as a cold front approaches the lake tonight, expect winds to pick up from the south at 20 to 30 knots, particularly over the central lake; a gust or two up to 30 knots, while not expected, cannot be completely ruled out either at this time. Along the front, there may be an isolated shower or thunderstorm over Lake Superior Saturday morning (15% or less), but for the most part no precipitation is expected. As the cold front moves through Saturday morning, expect to see winds veer to the west with a few gusts up to 20 to 25 knots before picking up over the western half of the lake from the west-southwest late in the day; expect the winds to die back down to 20 knots or less again Saturday night as high pressure returns to the region. Light winds of generally 20 knots or less look to continue through most of the rest of next week as high pressure ridging settles overtop the Upper Great Lakes.
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.MQT WATCHES/WARNINGS/ADVISORIES... Upper Michigan... None. Lake Superior... None. Lake Michigan... None.
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DISCUSSION...TAP AVIATION...TDUD MARINE...TAP
NWS MQT Office Area Forecast Discussion