textproduct: Gaylord

KEY MESSAGES

- Dry and increasingly cloudy today. Low RHs will lead to sneaky fire growth conditions this afternoon.

- Turning windier tonight into the day Tuesday with showers and pockets of steadier rain building tonight and clearing through the day Tuesday.

- Largely dry through the remainder of the week amid seasonable temperatures. Sporadic shower chances may blossom across the far southern reaches of the area at times.

DISCUSSION

Issued at 311 AM EDT Mon Sep 14 2026

Pattern / Forecast Synopsis:

Quick jet stream flow across the northern CONUS into southern Canada throughout the forecast period... 500mb ridge axis amplifies overhead as a shortwave ejects into the northern Plains, bringing with it a deep surge of warm and moist return flow through Tuesday. Focus of this moisture focuses along a slow-moving frontal boundary first set to be over northern Michigan late tonight into Tuesday, providing potential for efficient to perhaps heavy rainfall across the region, pending convective ingredient cooperation. The wave is set to flatten out as it continues northeast toward James Bay and eventually northern Quebec by midweek. Result will be the front passing through, but largely stalling out just to the south as zonal flow results in a parallel flow setup along the frontal boundary. Aforementioned zonal flow will continue to feed subtle 500mb shortwaves through this frontal zone, which could result in a split bag of drier conditions north and better shower potential south across the CWA as we progress through the remainder of the week.

Details:

The picture is big over the next couple days regarding the evolution of this incoming system... surface high pressure quickly builds across the region today, with ample dry air to work with (blatantly visible on the 14/00Z APX sounding). This wedge of dry air will be vital to forecast evolution across the region over the next 36-48 hours. Skies start quite clear today, but with the approach of the Plains shortwave, anticipating resultant return flow to commence warm and moist advection. Considering how dry it's going to be at the surface, will start to see moisture advection show aloft before it does at the surface, as high cloud builds through the afternoon into the evening. Speaking of that low level drier air... efficient mixing processes will allow for a dip in dewpoints through the afternoon, which could lead to a backdoor shot at some elevated fire parameters, but for the time being, stronger flow aloft should wait until later in the day / evening, which should stave off any fire concerns.

Deeper moisture does start to manifest tonight, with current guidance supporting best moisture pooling through the night favoring a corridor from northern Wisconsin through central and eastern upper, with lesser saturation favored the farther south one goes. Result will be more concentrated rainfall across eastern upper into the Tip of the Mitt through Tuesday morning. Current guidance suggests a general 0.50-1.00"+ across eastern upper, with spots in the Tip of the Mitt likely seeing totals that land a tenth or two on either side of 0.50". Rest of northern lower likely holds 0.25" or less (perhaps locally up to 0.50"). Firmly anticipating the rain shield to more or less be directly overhead by Tuesday, which should lead to a wet start to the day for most, if not, all of the region. Going through Tuesday, lift generally decreases through the region, which should lead to the erosion of the rain shield with time, and thus lessening shower coverage through the day as the front itself passes through. As such, could be quite the gap between better rains to the north and lesser rainfall to the south... and to add insult to injury for those looking for rain, the front looks to flare up again later Tuesday into Tuesday night, but current signals from guidance suggests that it will occur to the south of the region.

Another factor to contend with this system will be a gradually tightening pressure gradient, drumming up stronger winds across the region Monday night through Tuesday. Echoing previous forecaster's thoughts, general warm advection regime should mute much of the low level jet's mixing abilities via an inversion just off the deck. Make no mistake, it will turn quite breezy, but for now, looks like most places see 25-35mph wind gusts at times Monday night through the day Tuesday, perhaps pushing 40mph along the immediate lakeshores.

With the front clearing the region by Wednesday and the pressure gradient weakening considerably owing to another surface high moving overhead, much less breezy conditions to manifest, with post-frontal airmass in place as well. Front set to remain stalled downstate through the rest of the week, but will occasionally see waves pass through this frontal zone... some of which may hold just enough moisture extent to the north to drum up some shower chances Wednesday night - Thursday and again through the weekend, particularly the farther south one goes. Axis of heaviest rainfall from these waves should be suppressed well to the south of the region, thus limiting any additional appreciable rainfall potential across the region, and likely resulting in ample dry time. Seasonable highs in the 60s to lower 70s with overnight lows in the 40s and 50s seem likely Wednesday through the weekend. Looking way ahead into next week, longer term guidance is grumbling about another potent wave ejection that could send a deeper moisture plume back into the region, and thus may result in a more widespread rain chance as we get into next week... but it's still way too far out for specifics at this juncture.

AVIATION /12Z TAFS THROUGH 12Z TUESDAY/

Issued at 607 AM EDT Mon Sep 14 2026

Mainly VFR conditions will continue through the majority of the issuance period with any remaining BR dissipating quickly this morning. Light winds will persist through the morning, then southerly winds become breezy heading into the evening with gusts 20- 35 kts by the end of the period. High and mid clouds will increase later today ahead of our next widespread rain chances late tonight into Tuesday. Some LLWS looks to be possible Tuesday morning along with lowering flight conditions to MVFR/ IFR.

APX WATCHES/WARNINGS/ADVISORIES

MI...Beach Hazards Statement from late tonight through Tuesday evening for MIZ016-018-020-024-025-030-031-036-042-088- 095-096-098-099. MARINE...Gale Warning from midnight tonight to 5 PM EDT Tuesday for LHZ345. Gale Warning from 4 AM to 4 PM EDT Tuesday for LHZ346>349. Gale Warning from midnight tonight to 5 PM EDT Tuesday for LMZ323-341-342-344>346. Gale Warning from 3 AM to 11 AM EDT Tuesday for LSZ321. Small Craft Advisory from 9 PM this evening to 11 PM EDT Tuesday for LSZ322.