The federal government's official place-name database now calls Lake Ontario by the name Lake America, but the National Weather Service forecasts that boaters, anglers, and shoreline residents in western and central New York rely on have not caught up. As of the Buffalo forecast office's 4:53 a.m. EDT nearshore forecast on Thursday, Sept. 10, every New York zone on the lake was still labeled as Lake Ontario nearshore waters.

The gap exists because the renaming, ordered by President Donald Trump on Aug. 27, is moving through federal systems on different schedules. The Interior Department updated its Geographic Names Information System within two days of the signing, and the National Geospatial-Intelligence Agency said on Aug. 29 that it had made the matching change in the federal repository for foreign place names.

For people who live, work, or boat along the New York shore between the Niagara River and the St. Lawrence River, the practical question is not what a map app calls the water. It is whether warnings, forecasts, and charts will stay easy to find while the name changes in some federal products and not others.

The Order and Its 30-Day Clock

Executive Order 14422, published in the Federal Register on Sept. 2, directs the Interior secretary to rename the lake "within 30 days of the date of this order," working with the U.S. Board on Geographic Names. That window closes around Sept. 26.

The order also tells Interior and the board to update the names database and remove references to Lake Ontario from it, consistent with applicable law. It instructs the board to issue guidance so that federal maps, contracts, documents, and communications reflect the new name.

The text limits its own reach. It states that it creates no enforceable rights, and its directives cover how the federal government refers to the lake. It does not direct states, private companies, or Canada to adopt the name, and it does not mention the binational bodies that help manage the lake's water levels.

The White House framed the change around U.S. investment and commerce. The order says the U.S. Coast Guard supplies nine of the 11 icebreaking vessels on the Great Lakes and that the United States has invested nearly $4 billion in protecting the Great Lakes ecosystem over the past decade. Those figures come from the administration, and the order does not cite a source for them.

Forecast Zones on the New York Shoreline

The Buffalo office of the National Weather Service divides the New York side of the lake into four nearshore zones: the Niagara River to Hamlin Beach, Hamlin Beach to Sodus Bay, Sodus Bay to Mexico Bay, and Mexico Bay to the St. Lawrence River. Each carries a numbered code, LOZ042 through LOZ045, printed at the top of its forecast segment.

On Thursday morning, the office's experimental tabular nearshore marine forecast carried small craft advisories for all four zones, running through Thursday evening or late Thursday night. For the Sodus Bay to Mexico Bay zone, it called for west winds of 15 to 20 knots and waves of 4 to 6 feet, with occasional waves around 7 feet. Every one of those advisories went out under the Lake Ontario name.

There is a federal precedent for what may come next. After the Gulf of Mexico was renamed in 2025, the Weather Service issued a formal Service Change Notice that put Gulf of America into the names of existing marine zones in its mapping files, while the zone numbers stayed the same.

Nature World News did not find a comparable notice for the Lake Ontario zones as of Thursday. NOAA had not announced a schedule for relabeling forecasts or nautical charts in any material reviewed for this report.

That leaves a period in which a boater could see Lake America in a navigation app and Lake Ontario in the official marine forecast for the same stretch of water. The zone codes are the constant. In the Gulf case, they did not change with the name.

Two Countries, One Lake, Two Names

Canada has rejected the change. Prime Minister Mark Carney said on X that the name comes from the Wendat word Ontari'io and is more than 400 years old, adding that "naming reality means calling it Lake Ontario." New York Gov. Kathy Hochul also rejected the new name, writing that her state "won't be calling it that," and state governments are not bound by the order.

Ontario Premier Doug Ford unveiled a large bilingual sign at Fifty Point Conservation Area in Grimsby, Ontario, on Aug. 29, declaring that the lake would remain Lake Ontario, NPR reported. Google has begun showing Lake America to U.S. users of its maps, while users in Canada continue to see Lake Ontario and users elsewhere see both names.

The split matters for people who cross the water. The international border runs through the middle of the lake, so recreational boaters out of Rochester, Oswego, and Olcott can easily reach Canadian waters, where officials have given no sign they will adopt the new name. Mixed labels across apps, U.S. federal products, and Canadian products could persist for some time.

The lake itself is shared infrastructure. Outflows from Lake Ontario into the St. Lawrence River are regulated under the International Joint Commission, a U.S.-Canadian body, and New York pressed the commission for changes after record-high water levels flooded shoreline communities in 2017 and 2019. Nothing in the executive order changes how those outflow decisions are made.

Open Questions for Boaters and Shoreline Towns

Several practical questions remain unanswered. The Board on Geographic Names had not published the guidance the order requires for other federal agencies in material Nature World News reviewed. It is also unclear whether NOAA will relabel nautical charts, water-level products, and lake-effect snow messaging before the stormy late-fall season.

For now, readers who depend on lake forecasts can take a few simple steps. Boaters should look up the Buffalo office's nearshore forecast by zone and note the LOZ code for the waters they use, since that code is the stable identifier. Anyone who relies on a third-party weather app should confirm that it still pulls official Weather Service marine products for the correct zone.

Advisories and warnings should be followed as issued, whichever name appears on them. In an emergency on the water, boaters should contact the U.S. Coast Guard on VHF Channel 16 or call 911.

Shoreline property owners tracking water levels, erosion, or flooding can keep using the same agency pages they used before the order. A new name in a federal database does not change the lake's level, its storm behavior, or which agencies issue warnings.

The next markers are the order's deadline around Sept. 26, any guidance from the Board on Geographic Names, and any NOAA notice covering Great Lakes products. Until the labels change, the zone code, not the lake's name, is the most reliable way to find the right warning.

What Readers Want to Know

Did Lake Ontario's name officially change?

For U.S. federal government use, yes. The Interior Department's Geographic Names Information System now lists the lake as Lake America under Executive Order 14422. States, private companies, and Canada are not required to use the new name.

Do National Weather Service marine forecasts use the new name?

Not yet. As of the Buffalo office's 4:53 a.m. EDT forecast on Sept. 10, the four New York nearshore zones were still labeled Lake Ontario. NOAA had not announced a date for any change.

How can boaters make sure they are reading the right forecast?

Use the numbered zone codes, LOZ042 through LOZ045 for the New York nearshore waters. The codes identify the same stretch of water no matter which name is printed beside them.

Does Canada recognize the name Lake America?

No. Prime Minister Mark Carney rejected the change, and Ontario Premier Doug Ford has publicly said the lake will remain Lake Ontario.

When is the deadline in the executive order?

The order gives the Interior secretary 30 days from its Aug. 27 signing, which places the deadline around Sept. 26. Interior updated its database well before that date.

Does the renaming affect water levels or lake management?

No. Lake Ontario outflows are still regulated under the International Joint Commission, and the order does not change how those decisions are made or how weather warnings are issued.