Correction: Corrected September 17, 2026: the water-level paragraph now reports the archived NOAA station observations and their limits. Unsupported navigation implications were withdrawn. NOAA measurement context.
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Two vessels were tracking toward the Soo Locks Saturday morning from opposite ends of the shipping spectrum. Walter J. McCarthy, one of the longer American lakers on the Great Lakes, was downbound from the Keweenaw with a 14:54 ETA at the locks, last reported at 01:33. Running the same corridor and due to arrive 41 minutes earlier: Federal Montreal, a salty, with a 14:13 ETA on a 02:51 ping.
The convergence puts a foreign-flag vessel and a domestic giant at the same gates inside the same afternoon hour, two different worlds of Great Lakes commerce queuing up together. Neither has cleared yet as of this writing. Anyone positioned at the Soo this afternoon should have a view worth the drive.
Meanwhile the upbound side of the locks was busy before first light. St. Marys Pilot had the earliest ETA of the morning approach at 04:40, with Algoma Sault and Victory sharing a 06:45 slot and Dirk S. VanEnkevort close behind at 07:22.
The Paul R. Tregurtha was upbound toward Duluth from Bark Point, carrying a 06:35 Saturday ETA at the port, last reported at 03:44. She had been eastbound through the Straits of Mackinac as recently as August 14; she is back on Superior in short order.
Joseph L. Block was eastbound through the Straits of Mackinac with a 04:40 report early Saturday morning, the freshest Straits position in the data.
At Marblehead, Joyce L. VanEnkevort with consort Great Lakes Trader departed for Fairport Harbor on August 15. At Toledo, John J. Boland arrived from Defiance and Ashtabula bound for Torco; Federal Dart cleared for Montreal and Algoma Niagara for Hamilton.
On the St. Clair River this morning, American Century was downbound from Harbor Beach with a 07:46 ETA at Port Huron while American Integrity was pushing upbound past Grassy Island, ETA 09:20 at Port Huron. Two American-flag boats working opposite directions on the same stretch of river before mid-morning.
Archived NOAA station observations: Lake Superior, Sault Ste. Marie (NOAA station 9076027): 1.65 feet relative to local Low Water Datum, observed 2026-08-14 23:54 local standard time. Lake Michigan, Chicago (NOAA station 9087031): 2.264 feet relative to local Low Water Datum, observed 2026-08-14 23:54 local standard time. Lake Huron, Harbor Beach, MI (NOAA station 9075002): 2.142 feet relative to local Low Water Datum, observed 2026-08-14 23:54 local standard time. Lake Erie, Cleveland (NOAA station 9063053): 3.11 feet relative to local Low Water Datum, observed 2026-08-14 23:54 local standard time. Lake Ontario, Rochester, NY (NOAA station 9052030): 3.622 feet relative to local Low Water Datum, observed 2026-08-14 23:54 local standard time. These are individual gauge readings, not lake-wide averages or channel depths. They do not establish vessel clearance, cargo limits or comparative navigability.
Lake Michigan carries the day's main hazard: a stalled warm front over Illinois and Indiana is generating showers and thunderstorms across the southern half, waves at 3 feet. Lake Huron is the calmer choice, a 30.20-inch high holding over the northern lake through most of the afternoon before sliding southeast, waves at 2 feet. Lake Superior is in transition, a 30.2-inch high giving way to a 29.7-inch low tonight. Lake Erie and Ontario are running 2-foot and 1-foot seas respectively ahead of a warm front expected to lift tonight into Sunday.
The former Coast Guard buoy tender Sundew is headed to Rogers City this week for a public ceremony honoring the 33 sailors lost when the steamer Carl D. Bradley sank in Lake Michigan in November 1958. The Sundew pulled the only two survivors from the water that night. Now privately owned, the 82-year-old cutter will tie up at Lakeside Park for a service at which the Bradley's salvaged bell, brought up from the wreck in 2007, will be rung once for every man lost. The Presque Isle County Historical Museum and the Great Lakes Lore Maritime Museum organized the visit.