The phrase "alone warning" is not correct and does not convey a clear meaning in written English.
It may be intended to express a warning that stands by itself, but the phrasing is awkward and unclear.
Example: "The alone warning issued by the authorities was not enough to prevent the disaster."
Alternatives: "sole warning" or "single warning".
All the same, Mr. Morgan is not alone in warning that the battle to reduce Britain's debt and deficits is hitting a wall.
He has not been alone in warning the government that, when Uganda starts exporting oil in five or six years' time, donors will start directing their money towards other countries.
The power of images is particularly evident in advertising: A study published earlier this year in the journal PLOS One found that when it comes to anti-smoking ads, images are more effective than words alone in warning people about the dangers of smoking.
Because high social isolation is associated with higher risk of heat-related illness, programs to care for people living alone or making warning information accessible to those living alone are likely to reduce heat-related hospital admissions.
Halladay ran alone on the warning track in a downpour before the Phillies' workout on Tuesday, then played catch in the outfield with his fellow starter Cole Hamels.
Earlier, he was running, alone, on the warning track, preparing for his start Wednesday in Game 1 of the teams' National League division series.
Passing through airports or parks, mothers wrestle with whether to let their young sons use the restroom alone, and whether warning them of potential predators is alarmist, or appropriate.
Darling, though, is still cautious about going it alone - warning this could scare banks out of the City.
Her stillness alone failed to give warning to her daughters that a catastrophe had occurred for all of them.
