textproduct: Gaylord

KEY MESSAGES

-Largely quiet weather through the weekend with an outside chance of lake breeze driven showers / thunder in the afternoon today and again Sunday.

-Trending warmer with time, potential for hazardous heat and humidity early next week.

-Pattern becomes favorable for large thunderstorm complexes to traverse the Great Lakes into next week.

DISCUSSION

Issued at 105 PM EDT Fri Jul 10 2026

Pattern Synopsis:

Amplifying thermal ridging regime just to our west continues to supply the region with NW flow aloft, reinforced by a persistent troughing regime over Atlantic Canada. Result will be periodic intrusions of heat and humidity, coupled with shower and thunderstorm chances gracing the Great Lakes.

Surface analysis depicts the majority of moisture that generated yesterday's convection has been forced southward by the advancement of a stationary boundary (now acting as a cold front) currently stalling out from roughly Kansas City, MO to Toledo, OH... and points east through Albany, NY. Result is a less humid airmass over the region, albeit, still a little moist considering 16z dewpoints are still largely in the mid 50s to lower 60s. 16z analysis also shows a crescent shaped area of surface low pressure stretching from the western Corn Belt region through the Upper Great Lakes, curving northward to Hudson Bay. Result will be a good amount of subsidence overhead today, but not enough to eschew the development of cumulus clouds.

Details:

The question then becomes... how much vertical development can be realized with the CU field today, and will it be enough to force a shower? I would say for 98% of the NWS Gaylord footprint, the answer to that is yes. But for the other 2%? The answer is most likely no, on a localized scale.

Current 500mb temperature trends are absolutely decimating lapse rates aloft, essentially capping them at 5C/km... and even supplying a warm nose aloft. That much suppression should not be conducive to generating anything much more that some towering CU for the most part. But for some lucky folks in northeast lower and eastern upper, lingering marine influences are progged to lay down a corridor of low-to-mid 60s dewpoints, which will be just enough to bypass that warm nose in the instability profile. North flow with a warm airmass over land will encourage the development of inland advancing lake breezes, which should act as the source of lift that will generate some showers and perhaps a rumble of thunder across the aforementioned regions. Not really looking like a severe setup, but wouldn't be overly shocked to see some sub-severe hail and wind in the strongest updrafts considering modest streamwise vorticity, but it would have to be realized as these storms collapse and drop their cores to the surface.

For the weekend, even drier air builds for Saturday with the surface high overhead. Dewpoints lower into the lower 50s and should lead to less instability over the region. Should be a dry day with some diurnal cumulus overhead. By Sunday, the surface high will have shifted just to our east, which will lead to warm / moist advecting return flow overhead. With this reinforcement of moisture, could easily see another couple lake-breeze induced showers or storms across NE lower and eastern upper amid a weak SW flow regime.

Looking into next week, a bit more of an active progressive jet flow locks into place essentially along and north of the US / Canada border amid the thermal ridge over the Plains really flexing, and deeper troughing settling into Atlantic Canada and into the St. Lawrence River Valley. This result puts northern lower and eastern upper Michigan into a precarious place considering this type of pattern evolution suggests another round of large, long tracking Mesoscale Convective Complexes (MCSs) with each wave passage, instability and timing permitting of course. Certainly a bit early to nail down the timing and exact track of everything. But one thing is certain with this pattern- it will, at the very minimum, generate a considerable increase in humidity to the region (warm, muggy nights), and potentially air temperatures spiking as well. As such, will need to watch rather closely to see if we surge back into heat related headlines, which current indications are that the best shot for that is Tuesday, barring current temperatures progs being annihilated by a rogue MCS in the morning / afternoon that stunts temperatures.

Temp Forecast:

Today: Highs in the upper 70s to mid 80s (warmest Mackinac County and M-55 corridor). Tonight: Lows in the mid-to-upper 50s, coasts 60- 65. Saturday: Highs low-to-upper 80s, overnight lows 55-60 inland, 62-68 on the coasts. Sunday: Highs 85 to 90, overnight lows 60 to 70 (warmest coasts). Monday: 85 to 95, overnight lows 65 to 75+. Tuesday: Highs 88 to 95+ (warmest NE lower), overnight lows in the 60s to near 70. Rest of next week: Much more seasonable with highs in the low-to-mid 80s and overnight lows in the 50s and 60s.

AVIATION /18Z TAFS THROUGH 18Z SATURDAY/

Issued at 141 PM EDT Fri Jul 10 2026

Expect VFR should prevail through the remainder of the daylight hours with cloud bases around 4kft. Think there is low potential for SHRA/TSRA esp at CIU; even lower potential but still non-zero for TVC, MBL, PLN with lake breeze. After dark, expect light/vrb winds to revert to light offshore/land breezes; think fog will develop again at most, if not all sites, and have some IFR visbys tempo-ed in around/after 8z-12z (could start as early as 2-5z, though), esp for our northern sites (CIU/PLN/APN). Non-zero shot at SHRA in the morning at CIU/APN but think most areas will remain dry with light winds becoming S/SW toward the end of the TAF period and beyond.

APX WATCHES/WARNINGS/ADVISORIES

MI...None. MARINE...None.