Tropical Storm Nadine, if it forms, will "fizzle out slowly" as it treks across Belize, Hoegg said. Most spaghetti models—or computer models illustrating potential storm paths—anticipate that the storm won't grow stronger than a Category 1 hurricane, if it even reaches hurricane strength.

Both Hurricane Oscar and Tropical Depression Nadine were bringing rains and wind to Mexico and Caribbean Islands respectively on Sunday.