The most reliable early warning system for new restaurants on Long Island is not a food blog. It is the trail a restaurant leaves as it gets ready to open: a corporation forms, ties itself to an exact address, and lays plans to pour wine and cocktails, all of it weeks or months before a sign goes up in the window. Seven new restaurant projects across Nassau and Suffolk have surfaced that way since late July.

Brightwaters: something called Roux Bar at the old Sea Levels

The newest arrival is the most interesting. In early August, a corporation called Roux Bar RG Ltd surfaced with restaurant plans for 391 North Windsor Avenue in Brightwaters. That address belonged to Sea Levels, the seafood restaurant that anchored the little Brightwaters business strip for two decades before closing; the farewell message still up on the restaurant's own website thanks customers for 20 years.

The plans tell us nothing else yet, but the name does some talking. A roux is the flour-and-fat base of Cajun and Creole cooking, which would make this something the greater Bay Shore area does not currently have. That is a reading of the name, not a confirmed fact, so hold it loosely until the operators say what they are building.

Albertson: movement at Vincent's

A day earlier, Vincent's of Albertson LLC emerged with restaurant plans for 1004 Willis Avenue in Albertson. That is the address of Vincent's Restaurant and Pizzeria, a neighborhood Italian fixture. New corporate activity at an existing restaurant usually means one of two mundane things, a bar being added where there was not one, or the trail of an ownership change, and either way it signals investment in the place rather than a vacancy.

Westhampton Beach: a galley on Mill Road

Also in early August, Galley on Mill LLC set its sights on 162 Mill Road in Westhampton Beach, on the road that carries most of the traffic into the village. A galley is a ship's kitchen, which on the Westhampton waterfront economy is at least a strong hint about the intended mood. The East End restaurant calendar being what it is, an August start points at a buildout aimed at next season rather than this one.

Mattituck, Bay Shore, Patchogue, East Northport

The rest of the crop covers a lot of the Island. La Union Latino Bar and Grill Corp has plans for 10095 Main Road in Mattituck, which would add a Latin bar and grill to the North Fork's main artery. In late July, Kiwami Hospitality Inc turned up with plans for a space at 1701 Sunrise Highway in Bay Shore, which is the South Shore mall property; kiwami is a Japanese word for the utmost or the extreme, familiar to sushi eaters as the label on a chef's top-end selection. THR33 MS Restaurant Group Corp is aiming at 32 Baker Place in Patchogue, a short street in the blocks where downtown meets the Patchogue River. And Vespri LLC has its eye on 508 Larkfield Road in East Northport; vespri is Italian for evening prayers, which is either a name with a wink in it or a very confident dinner concept.

Port Jefferson gets a brewery project

One more, from just before this window, is worth the mention because it is a different kind of business entirely. American Beverage Crafts LLC is laying the groundwork for a small production brewery with taproom ambitions at 22 Mill Creek Road in Port Jefferson, down by the harbor. Port Jefferson village has been rebuilding its harborfront identity for years, and a working brewery at Mill Creek would be a concrete piece of it.

How to read this pipeline, and how not to

Plans are a statement of intent, not a ribbon cutting. Every one of these projects sits at the earliest stage, months from a first pour, and some will go nowhere. Names change, concepts change, deals fall through. What the pipeline does tell you, reliably, is where money is being spent right now: nobody hires a lawyer and forms a corporation for a space they are not serious about.

It also tells you something about the shape of the coming year. A few weeks of activity put new restaurant investment in Brightwaters, Albertson, Westhampton Beach, Mattituck, Bay Shore, Patchogue and East Northport, plus a brewery in Port Jefferson. That is south shore, north shore, both forks and the middle of Nassau, all at once. For all the churn in Long Island restaurants, the pipeline is full, and now you know where to watch for the signs going up.