Map: Atlantic Sea Surface Temperature Anomaly, September 4, 2017
by NOAA/NWS/NCEP/EMC
![](/sites/default/files/styles/content_header_image/public/resources/sst_sept_4_2017_baseline.png.webp?itok=E6vMwDzY)
Irma intensified rapidly between Sept 4 and 5[1], amid Atlantic sea surface temperatures ranging from 0.9°F to 2.25°F (0.5°C to 1.25°C) above average, relative to a 1961-1990 baseline.
(The baseline can be found in the middle of this page.)
Data for September 4, 2017 is available, here, and archival data is available, here.
A description of the analysis is available, here.