Hurricane Harvey
Measured data for cyclone Harvey, as finalised by the National Hurricane Center.
Official warnings come from the National Hurricane Center and your local emergency agency. This page is informational and does not replace an official advisory.
Wind
115 kt
Category 4
213 km/h · 132 mph
Pressure
937 hPa
Period
2017
Aug 16, 2017 → Sep 02, 2017 · 5 landfall
Position
| When | Position | kt | hPa | Category |
|---|---|---|---|---|
| Aug 16, 2017 06:00 UTC | 13.7, -45.8 | 25 | 1,013 | LO |
| Aug 17, 2017 12:00 UTC | 13.1, -53.4 | 30 | 1,008 | TD |
| Aug 18, 2017 18:00 UTC | 13.2, -62.2 | 35 | 1,005 | TS |
| Aug 20, 2017 00:00 UTC | 14.0, -71.0 | 30 | 1,007 | WV |
| Aug 21, 2017 06:00 UTC | 15.7, -80.5 | 25 | 1,008 | WV |
| Aug 22, 2017 12:00 UTC | 19.4, -88.8 | 25 | 1,010 | WV |
| Aug 23, 2017 18:00 UTC | 21.6, -92.4 | 35 | 1,005 | TS |
| Aug 25, 2017 00:00 UTC | 25.0, -94.4 | 80 | 973 | HU |
| Aug 26, 2017 06:00 UTC · landfall | 28.2, -97.1 | 105 | 948 | HU |
| Aug 27, 2017 12:00 UTC | 29.1, -97.5 | 35 | 998 | TS |
| Aug 28, 2017 18:00 UTC | 28.4, -95.9 | 40 | 997 | TS |
| Aug 30, 2017 00:00 UTC | 28.9, -93.8 | 45 | 994 | TS |
| Aug 31, 2017 06:00 UTC | 31.9, -92.2 | 25 | 999 | TD |
| Sep 01, 2017 12:00 UTC | 36.0, -87.1 | 25 | 1,002 | EX |
How to read this page
How to read wind and category
Harvey had maximum sustained winds of 213 km/h, category Category 4 on the Saffir-Simpson scale — a 1-to-5 scale based on wind alone.
Where this data comes from
Track and intensity come from HURDAT2, the NOAA National Hurricane Center’s historical storm catalogue.
What the category doesn’t tell you
Harvey’s category measures wind alone. Rain, storm size and storm surge aren’t in it, and have killed more people than wind in recent hurricanes.
Words on this page
Saffir-Simpson category
A 1-to-5 scale that classifies a hurricane by its maximum sustained wind. From category 3 up a hurricane counts as "major", with significant structural damage expected; the scale ignores rain, size and storm surge, which can be deadly even at a low category.
Standard definition by NHC — National Hurricane Center (Saffir-Simpson Hurricane Wind Scale) · Saffir-Simpson category
Preliminary data
A measurement published as soon as it is collected, before the agency’s final review. It can be corrected or withdrawn: earthquake magnitudes shift in the first hours, air-quality readings are revised weeks later. Use it to plan your day, not for regulatory or legal purposes.
- NOAA HURDAT2 (banco de melhores trajetórias)Licence: Domínio público (dado federal dos EUA) · Credit: NOAA / NHC, HURDAT2 (Atlântico e Pacífico Nordeste)
How to read these numbers
Track points come from HURDAT2, with position, wind and pressure every six hours. Rows marked as landfall are the moments when the centre crossed the coastline.
Frequently asked questions
- What category did Harvey reach?
- The sheet shows the peak category, derived from the highest one minute sustained wind in the final reanalysis.
- Why is the death toll not shown?
- Deaths and damage come from narrative reports with varying methodology, not from the track database. We leave that number to the official source.