The phrase "a warning advising" is correct and usable in written English.
It can be used when you want to indicate that a warning is providing advice or guidance about a particular situation or action.
Example: "The report included a warning advising users to back up their data regularly to prevent loss."
Alternatives: "a caution suggesting" or "an alert recommending".
On June 27, the State Department renewed a warning advising Americans about the dangers of traveling to Turkey because of terrorist threats.
THE NEWS As Ms. Rice was heading to Afghanistan, the State Department issued a warning advising Americans against travel to the country.
Some readers have pointed out, however, that in addition to passages of breathtaking brilliance, the novel, like the tax code, also contains sections so eye-glazing they ought to come with a warning advising readers to wait a while before driving or operating heavy machinery.
The largest gay newspaper in Australia used the Dade County vote as a warning advising gay men and lesbians there to "Get off Your Butts".
The US Consulate in Guadalajara issued a warning advising "American citizens to avoid traveling in the area and to stay alert to public announcements from Mexican police and authorities".
Fourthly - and this, of course, does not apply to homeopathic medicinal products for veterinary use - is it really appropriate to provide a warning advising the user to consult a doctor if the symptoms persist 'during the use of the medicinal product'?
Illocutionary acts are the acts that a speaker performs in uttering a sentence: warning, advising, describing, directing or commanding, asking, expressing and so on.
In December 2009 the FDA issued a national warning advising pregnant and breastfeeding women to avoid consuming nzu, a West African traditional remedy for morning sickness sold in pellet or powder form around the world.
The State Department issued a travel warning advising Americans to avoid travel to Pakistan.
Last November, the State Department issued a travel warning, advising against nonessential travel to Indonesia, citing separatist violence in several provinces, none of which are considered tourist areas.
A separate group of law enforcement interrogators eventually took over the questioning from military personnel, and a Miranda warning, advising him of his right to remain silent, was given.
