A 52-year-old male with a 20-year history of alcohol use disorder is admitted to the medical unit after presenting with tremor, diaphoresis, and anxiety 18 hours after his last drink. His CIWA-Ar score is 22. On assessment, he demonstrates coarse tremor with arms extended, moderate diaphoresis, reports visual disturbances described as 'the walls are moving,' and exhibits marked anxiety and agitation. Vital signs reveal heart rate 108 bpm, blood pressure 168/102 mmHg, and temperature 37.8°C. He had a prior alcohol withdrawal seizure 3 years ago. The PMHNP is determining the severity classification and monitoring frequency. Which interpretation of the CIWA-Ar score and clinical presentation best guides the assessment and monitoring plan?