This OID stores the high-temperature warning trigger point in degrees Celsius (-128 to +128 range), which is a non-critical alert that triggers before the high-alarm threshold. Network engineers use this to get early notice of cooling problems, typically set about 5 degrees lower than the high-alarm threshold, so they can increase ventilation or investigate before critical temperatures are reached. A value of 65°C with a high-alarm set to 70°C gives engineers a 5-degree warning window.