Using the phrase "alarming for" is correct and usable in written English.
Example sentence: The increase in cases of the virus is alarming for the entire world.
That's alarming for a number of reasons.
The numbers are alarming for two reasons.
"That has to be alarming for the Mets.
There is some evidence that this result is alarming for Nick Clegg personally.
Even more alarming for the Fox network is the expanding falloff from last year.
Polling from other parts of the country was no less alarming for Trump.
The shooting, alarming for its callousness, is the 21st gun attack in Salford in 18 months.
What is alarming for David Moyes is that United never looked close to scoring.
Trump's win is uniquely alarming for the fact of his ignorance of law and convention.
Most alarming for Woods, there was no obvious explanation for his struggles on the holes that he typically dominates.
The implications are alarming for everyone who wants to live in a country where such violence is beyond the pale.
