At 2 a.m. EDT Tuesday, the National Hurricane Center said tropical cyclone formation was not expected in the North Atlantic, Caribbean Sea, or Gulf of America during the next seven days, but that did not mean the tropical map was empty. [1]

In the eastern and central North Pacific outlook issued at 11 p.m. PDT Monday, NHC said a low well southwest of the southern tip of Baja California was becoming better organized, that a tropical depression was expected to form during the next day or two, and that formation chances were 70 percent through 48 hours and 90 percent through seven days. [1]

A second eastern Pacific area was likely to form offshore of Central America and southern Mexico late this week or over the weekend, with a near-zero 48-hour chance and a 40 percent seven-day chance. [1]

That is the map-reading lesson: Atlantic households still prepare for hurricane season because seasonal risk is not a landfall promise, but today's live development risk sat in another basin, and weather discourse rewards the brightest blob while service journalism asks which basin, which clock, and which percentage.

The timestamp is part of the forecast, so this brief uses the NHC outlook visible early Tuesday rather than a permanent description of the tropics, and because the next advisory cycle can change the percentages, the responsible habit is to read basin, issuance time, 48-hour odds, and seven-day odds together.

-- DARA OSEI, London