But they don't seem to give weekly averages for the globe, nor for latitude bands, and I think that would be useful. So I have been experimenting with downloading and integrating the grids, as with NCEP, with a view to adding to the latest data page.
I tested the NINO region integrals against the NOAA figures here, and they match to the one decimal place that NOAA provides. So I think the anomaly formation, using the NOAA daily climatology here, and the spatial integration are OK.
In this post, I'll show an active plot for the weeks to date of 2015 for the globe, the main NINO regions (details below) and four latitude bands (SH 60°-tropic, SH tropics, and NH likewise). Later I hope to give longer duration plots, and WebGL global maps.
The NINO regions are (NOAA map here):
- NINO4 (5S-5N, 160E-150W)
- NINO3.4 (5S-5N, 170W-120W)
- NINO3 (5S-5N, 150W-90W)
- NINO1+2 (10S-0, 90W-80W)
The plot is a version of the active plot in the data page. I doubt that you'll need the x-axis drag facility, with only 43 weeks, and the trend won't be meaningful. The plot starts with everything showing, but you can toggle off data that you don't want. You may need to stretch the y-axis by draging (vertically) to the left of it. The anomaly base is 1981-2010. Here is is: