"robust warning" is correct and usable in written English.
It can be used to describe a warning which is strong and clear. Example sentence: "The judge issued a robust warning to the defendant to stay away from the victim."
Given the implications, it's no surprise two European commissioners delivered robust warnings of the potential costs of such a course of action.
Hopes of progress at a meeting to avert a crisis in Northern Ireland's public finances and power-sharing agreement have receded further after the British government and Sinn Féin issued robust warnings reaffirming opposing positions.
These human assets were supplemented with robust early warning systems, one of the world's most advanced theatre missile defense networks, and a mechanized force that included some 2,500 main battle tanks and more than 5,000 armoured personnel carriers.
The aim is to show how the fault estimation can provide robust early warning of actuator fault detection scenarios that can lead to abnormal aircraft flight configurations.
Considering the complexity of fault rupture and the short fault distances involved, a simple and robust early warning algorithm, based on the exceedance of specified threshold time domain amplitude levels (band-pass-filtered accelerations and the cumulative absolute velocity), is implemented.
Epidemics prevention requires development of more robust early warning systems to detect such threats.
A robust cyclone-warning system saved thousands of lives.
In Bangui, capital of the CAR, HIV prevention programs are so robust that billboards warning about HIV line major streets and live-saving drugs are widely available for free thanks to money from the Global Fund.
In an interview afterward, Ms. Lagarde elaborated on the theme, warning that robust lobbying threatened to weaken the efforts by regulators and legislators to force banks to hold more and better capital against their loans and to be more transparent.
