136 FXUS63 KMQT 130629 AFDMQTArea Forecast Discussion National Weather Service Marquette MI 229 AM EDT Sat Sep 13 2025
.KEY MESSAGES...
- Showers and a few thunderstorms this morning.
- Fog late tonight?
- Warmer temperatures mainly in the 70s through the forecast period.
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.SHORT TERM /THROUGH TONIGHT/... Issued at 213 AM EDT Sat Sep 13 2025
A shortwave moving overhead is bringing rain showers and a few embedded t-storms to the U.P. early this morning as it continues southeast from the Upper Midwest towards the Ohio Valley today (as can be seen from the latest satellite and radar imagery). As the omega block moves overhead today, expect the showers and storms to end by mid morning, with skies clearing out by the afternoon. Overall, not much in the way of rainfall is expected with the showers and storms from this shortwave this morning; NBM and WPC guidance has spots at most receiving up to 0.30" of new liquid.
Given the clearing skies and increasing high pressure today/this afternoon, thinking highs will be slightly warmer than what was realized yesterday; thinking most spots will be in the lower to mid 70s, with a few isolated spots in the interior west potentially flirting with 80F. In addition to the warmer temperatures, the high pressure will keep winds light at the sfc. Therefore, by the afternoon hours, expect the lake breezes from both Lake Superior and Lake Michigan to begin pushing inland, although with the land to sea- sfc temperature difference not being that large given that it`s the end of the stable season/beginning of the unstable season, expect the lake breezes to be fairly light by mid to late this afternoon.
Moving into the overnight hours, we may see some fog develop over the U.P. late tonight. Because of this, low temperatures tonight look to be moderated, only getting down into the mid 50s across the area (should the fog verify). The fog may also be dense; will need the day shift to take a look at dense fog chances across the area tonight as a Dense Fog Advisory could be in the cards for much of the area.
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.LONG TERM /SUNDAY THROUGH FRIDAY/... Issued at 228 AM EDT Sat Sep 13 2025
High pressure remains in control from Sunday through much of the coming week as ensembles continue to show good agreement on a stout upper ridge gradually shifting eastward across northern Ontario through Wednesday. Temperatures will continue to trend upward as a result, with highs generally in the mid to upper 70s through the period and even some low 80s across the western half of the U.P. during the first half of next week. Latest NBM probabilistic guidance gives the Marquette area around a 25-30% chance to reach 80 degrees both Tuesday and Wednesday. There remains some potential for a few disturbances to clip the area with a few periods of showers and thunderstorms next week as the ridge axis nudges east of the area. Latest guidance has trended even drier for Monday and Tuesday, generally keeping Pops out of our area before potentially spreading into the U.P. Wednesday and Thursday of next week.
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.AVIATION /06Z TAFS THROUGH 06Z SUNDAY/... Issued at 121 AM EDT Sat Sep 13 2025
VFR will be the predominant flight category with a few exceptions early this morning. Scattered showers and thunderstorms continue to make their way from northwest to southeast across Upper Michigan early this morning. IWD is pretty much done with the precipitation, but tempos are moreso needed at CMX and SAW through Sat 10Z until activity exits the forecast area. In the wake of showers, fog formation could result in MVFR/IFR visibility restrictions at CMX and SAW through daybreak. Fog should dissipate by mid-morning with onset of daytime heating. Winds will remain light and non-impactful.
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.MARINE... Issued at 228 AM EDT Sat Sep 13 2025
Light winds of 20 knots or less are expected to continue over Lake Superior this weekend through the middle of next week as a high pressure block moves through the Upper Great Lakes and settles over southeastern Canada/northeastern U.S. over the next several days. Dry weather is expected to continue over the next several days, but some showers and storms could return to the far western lake Monday and Tuesday before pushing towards the rest of the lake Wednesday and Thursday.
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.MQT WATCHES/WARNINGS/ADVISORIES... Upper Michigan... None. Lake Superior... None. Lake Michigan... None.
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SHORT TERM...TAP LONG TERM...CB/TAP AVIATION...TDUD MARINE...TAP
NWS MQT Office Area Forecast Discussion