diff --git a/send_ups_alert.py b/send_ups_alert.py
index 9693253..9c7b3d1 100644
--- a/send_ups_alert.py
+++ b/send_ups_alert.py
@@ -6,23 +6,23 @@ from sys import argv
 from alerting import alerts
 
 type_priority_map = {
-    "ONLINE": alerts.Severity.INFO,
-    "ONBATT": alerts.Severity.WARNING,
-    "LOWBATT": alerts.Severity.CRITICAL,
-    "FSD": alerts.Severity.CRITICAL,
-    "COMMOK": alerts.Severity.INFO,
-    "COMMBAD": alerts.Severity.WARNING,
-    "SHUTDOWN": alerts.Severity.CRITICAL,
-    "REPLBATT": alerts.Severity.WARNING,
-    "NOCOMM": alerts.Severity.WARNING,
-    "NOPARENT": alerts.Severity.CRITICAL,
-    "CAL": alerts.Severity.INFO,
-    "NOTCAL": alerts.Severity.INFO,
-    "OFF": alerts.Severity.CRITICAL,
-    "NOTOFF": alerts.Severity.INFO,
-    "BYPASS": alerts.Severity.WARNING,
-    "NOTBYPASS": alerts.Severity.INFO,
-    None: alerts.Severity.CRITICAL,
+    "ONLINE": alerts.Severity.INFO,  # UPS is back online
+    "ONBATT": alerts.Severity.WARNING,  # UPS is on battery
+    "LOWBATT": alerts.Severity.CRITICAL,  # UPS is on battery and has a low battery (is critical)
+    "FSD": alerts.Severity.CRITICAL,  # UPS is being shutdown by the primary (FSD = "Forced Shutdown")
+    "COMMOK": alerts.Severity.INFO,  # Communications established with the UPS
+    "COMMBAD": alerts.Severity.WARNING,  # Communications lost to the UPS
+    "SHUTDOWN": alerts.Severity.CRITICAL,  # The system is being shutdown
+    "REPLBATT": alerts.Severity.WARNING,  # The UPS battery is bad and needs to be replaced
+    "NOCOMM": alerts.Severity.WARNING,  # A UPS is unavailable (can’t be contacted for monitoring)
+    "NOPARENT": alerts.Severity.CRITICAL,  # upsmon parent process died - shutdown impossible
+    "CAL": alerts.Severity.INFO,  # UPS calibration in progress
+    "NOTCAL": alerts.Severity.INFO,  # UPS calibration finished
+    "OFF": alerts.Severity.CRITICAL,  # UPS administratively OFF or asleep
+    "NOTOFF": alerts.Severity.INFO,  # UPS no longer administratively OFF or asleep
+    "BYPASS": alerts.Severity.WARNING,  # UPS on bypass (powered, not protecting)
+    "NOTBYPASS": alerts.Severity.INFO,  # UPS no longer on bypass
+    None: alerts.Severity.CRITICAL,  # unknown alert type
 }