"possible severe" is a correct and usable phrase in written English.
You might use it to suggest that something is potentially very serious in nature. For example: The patient is exhibiting signs of a possible severe allergic reaction.
19 Tattooing is known for its possible severe adverse effects including inflammatory reactions (as possibly occurred in patient 2), Koebnerization of existing dermatoses, transmission of infectious diseases, and the development of cancer.
Based on concern about possible severe sequelae arising after a high total cumulative dose to the breast, several authors [ 5, 6] have suggested mastectomy as the treatment of choice for breast cancer arising after radiotherapy for HD.
Possible severe storms on Sunday.
National Weather Service hurricane hunter aircraft are even flying into the storm to gather data and refine the forecast given the possible severe impacts in coastal areas.
Because of its possible severe side effects, including granulocytopenia or even agranulocytosis, clozapine treatment entails regular WBC monitoring, which can be a major drawback for patients and practitioners.
With low proven long-term effectiveness and possible severe side effects, psychotropic drugs in geriatric patients should be prescribed with utmost caution.
With tremors still rumbling through the earthquake zone, it took only a warning of a possible severe aftershock on regional media reports to spread panic in Chengdu, the capital of Sichuan Province, and in at least one other Sichuan city.
One monograph, Reconstructing Iraq, by the US Army War College's Strategic Studies Institute, predicted in detail "possible severe security difficulties" and conflicts among Iraqis that US forces "can barely comprehend".
Psychiatrists testifying separately for the defense team and the prosecution said that Mr. Stanford had become mentally incapacitated by a combination of depression, addiction and possible severe brain injury suffered in a fight with an inmate in 2009.
The governor of Puerto Rico ordered all government agencies to reopen their books and initiate a recount and review of certified deaths that have occurred since Hurricane Maria, after weeks of reporting by various news outlets pointed to a possible severe undercount of storm fatalities.
Even though the rare probability of this accident, it still has got a lot of concerns in the safety analyses of HTR-PM, due to the possible severe consequences of the air ingress accident, which would cause oxidation of the graphite material in the reactor.
