The phrase "alarming warning" is correct and usable in written English.
It can be used to describe a warning that is particularly concerning or distressing.
Example: "The alarming warning issued by the meteorological department prompted residents to prepare for the impending storm."
Alternatives: "serious alert" or "disturbing notice".
But the pills now come with an alarming warning, mandated by the Food and Drug Administration, about serious side effects.
This alarming warning turned out to be nothing more than Hugh Bonneville disguising himself in women's clothes, so don't get your hopes up just yet.
The energy regulator has issued a new and more alarming warning about the potential for blackouts, saying Britain's spare capacity margin could dwindle to zero as early as next year.
"It is an alarming warning sign of how bad things have gotten that the timber, oil and mining industries would be this brazen about buying their way onto the Capitol Hill agenda," one conservationist told The Denver Post.
Last week, a study published in the British medical journal the Lancet had an alarming warning for people who work more than 55 hours a week: They appear to have a 33percentt higher risk of stroke than those toiling a more sane 35 to 40 hours each week, and a 13percentt increased risk of coronary heart disease, too.
The budget airline has issued an alarming warning on the possible effects of Brexit on the travel industry, saying that aviation should be treated as a matter of urgency in our negotiations, as summer schedules for 2019 flights must be finalised by March of next year.
Officials had received a number of alarming warnings over the years, including at least four that linked former student Nikolas Cruz to a possible school shooting, but it appears the most alarming warnings prompted no investigation.
The most alarming warnings apparently emanated from Denise Spellberg, an associate professor of history at the University of Texas at Austin.
Sir Nicholas Hytner has delivered alarming warnings about the health of British arts and culture amid Brexit, council spending cuts and the downgrading of subjects at school.
The rising trend has continued despite increasingly alarming warnings from scientists over the future of the climate, and commitments by developed countries to cut their carbon and from major developing economies to curb their emissions growth.
The program pulled together the entire federal government's expertise on climate change; you might have heard about its newsmaking most recent report, issued the day after Thanksgiving, with alarming warnings about the need for more robust efforts to fight climate change.
