María at Yabucoa, September 20, 2017

The National Hurricane Center's Tropical Cyclone Report on María, AL152017, is the track document. At about 1015 UTC on September 20, 2017 — 0615, or 6:15 a.m., Atlantic Standard Time — the center made landfall near Yabucoa as a high-end Category Four hurricane with maximum sustained winds of 155 miles per hour and a central pressure of 920 millibars. That is the landfall line this essay will repeat.

NWS San Juan agrees with the TCR: landfall at Yabucoa, at about 1015 UTC, 155 miles per hour. Death counts are not in this record.

María had already struck Dominica as a Category Five. Southeast of Puerto Rico it reached a peak, then an eyewall replacement cycle brought it down to Category Four before Yabucoa. It was still the strongest blow to Puerto Rico since San Felipe el Segundo in 1928. Category Five in Dominica, Category Four in Puerto Rico: those are different islands and different labels. Fusing them into a single phrase of "Category Five Puerto Rico" is a television habit, not a TCR habit.

The eye moved west-northwest across the island and exited the northwest coast that afternoon. Rainfall was extreme in the interior and the north. Caguas recorded totals the report treats among the highest. The eyewall expansion before landfall spread hurricane-force winds across a wider swath than a tiny eye would have. Yabucoa was the point. The whole island was the field.

This essay stops at the meteorology. How many people died, and by which method, is the next record. How the PREPA grid failed is a later record. How the flood maps were redrawn is later still. The TCR is already long. It does not need a census hanging off a pressure reading.

The strongest blow to Puerto Rico since San Felipe II, 1928: that is a Category and pressure claim from the official report, not a death-count claim.

Read AL152017 for the hours, the millibars, the Dominica strike, and the Yabucoa strike. If a sentence cannot be cited from that report or from the San Juan office summary, it does not belong here. The saint's-day hurricanes had calendar names. This one has a Center number. Use the number.

Sources: NHC Tropical Cyclone Report, Hurricane Maria (AL152017). Freeze 2026-08-22.