textproduct: Gaylord

KEY MESSAGES

- Cooler and breezy today, resulting in dangerous swimming conditions along portions of the shoreline.

- Holding dry through at least Thursday. Next rain chances return Friday.

- Following a couple pleasant and seasonable days, increases in humidity and temperature (slightly above normal) build Thursday and especially Friday.

DISCUSSION

Issued at 135 PM EDT Tue Jul 28 2026

Pattern / Forecast Synopsis:

Northwest flow regime remains entrenched across the Great Lakes and upper Midwest as a robust thermal ridge remains anchored over the spine of the Rockies, and troughing holds over northern Quebec into the Canadian maritimes. Result will be the continuity of progressive flow across the region, bringing quick-hitting periods of shortwave trough passages mixed in with height rises and surface high pressure passing over the region, though this status quo may face some alteration by the conclusion of the forecast period.

Current short-term trend showcases yesterday's shortwave trough has been forced south and east into the eastern Great Lakes, with closing off surface low pressure anchored just north of Lake Ontario and southwest into northeast Ohio. Attendant cold frontal boundary stretches from roughly Toronto south and west through Cleveland and into Indianapolis, with cooler and drier air moving into the upper Great Lakes, courtesy of an area of surface high pressure and 500mb height rises, which will lead to a strong subsidence inversion building. Drier air aloft will mix to the surface through the day today, eventually scouring out ongoing low level cloud cover. Surface high pressure moves overhead into tonight, bringing about seasonable temperatures and lower humidity to the region through Thursday. Backside return flow manifests by Friday ahead of the next progged shortwave trough passage, which should also coincide with the next rain chances across the region. At this juncture, potential for severe storms looks quite murky given the uncertainty regarding timing of the feature's passage. Will have to watch how this particular shortwave is forced, as current guidance trends toward the ongoing closing-off system over the northeast CONUS to cut off and stall over New England, which may turn our upper flow northerly, and lead to a chain reaction blocking pattern either by the end of or just beyond the forecast period.

Details:

Seasonable and dry through at least Thursday: High pressure intruding coinciding with 500mb height rises should scour out moisture and bring a comfortable, seasonable airmass to the region through at least Thursday, perhaps even most of Friday pending the passage of the next shortwave. Anticipating a relatively longer run of little changing weather conditions in comparison to the observed summer thus far. Result will be sunnier days across the region with highs in the 70s and 80s both today and Wednesday amid a much less humid airmass. This will allow overnight lows to dip into the upper 40s and mid 50s across the interior through Wednesday night, with the coasts holding near 60 degrees. Plume of higher dewpoints creeps in by Thursday, leading to a subtle uptick in humidity, though a lack of synoptic forcing should put a cap on any convection. Southerly flow builds by Friday, bringing even more humid air and warmer temperatures ahead of the next approaching system. Highs Thursday and Friday peak into the 80-87 degree range, with overnight lows generally 55 to 65+ across the board.

Next Rain Chances: Aforementioned next system builds into the upper Midwest come Friday, and should approach the Great Lakes by Friday night. Lots of mixed signals with this system considering unknown evolution of the system currently over the eastern Lakes into the St. Lawrence River Valley. In the event that this ongoing system to our east closes off and forces a southerly dig of longwave troughing just to our east, this may veer our upper flow more northerly. In the event this trend is realized, the next system may deliver nothing much more than a glancing blow to the region, as opposed to passing right overhead. As such, will be hesitant to go with much more than scattered shower and storm activity Friday into Friday night, because in the event this does occur, deeper moisture plume will be suppressed away from the region and rain chances will be confined to our south for the time being. The other caveat this presents is that the progressive flow regime we have been entrenched in for months now may take a backseat to potential blocking in the mid levels... especially considering the jet stream will essentially be riding north of the US / Canada border, thus limiting any meaningful synoptic mechanisms to force and cutoff systems out of any given area. Certainly something to watch going forward, with non-zero potential for longer lasting, block-dominant weather trends to manifest by the end of or just beyond the forecast period.

AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/

Issued at 1231 PM EDT Tue Jul 28 2026

Primarily VFR with some lingering MVFR clouds possible, esp for APN this afternoon, though expect these should fade this afternoon. (Could perk back up around 20-24z.) Have concerns for some patchy fog overnight, esp in areas that saw rain yesterday...have hinted at this idea in the tafs, though not a certainty, esp if winds end up a little too strong. N winds generally 10-15kts, could gust 15-20kts, through rest of the afternoon; should slowly drop back to 5-10kts overnight which could allow for some land breezes/onshore flow (esp TVC). Winds likely to diminish further Wednesday as high pressure moves overhead.

APX WATCHES/WARNINGS/ADVISORIES

MI...Beach Hazards Statement until 8 PM EDT this evening for MIZ030- 031-036. MARINE...Small Craft Advisory until 11 PM EDT this evening for LHZ347>349. Small Craft Advisory until 6 PM EDT this evening for LMZ323- 342-344>346. Small Craft Advisory until 8 PM EDT this evening for LSZ321.