The fact is the atmosphere is in a Niña background state despite the weak Niña sea surface temps. Under sea temp anomalies are at -5C. Add to that currently a strong easterly wind burst (typical Nina) in a typically crummy Niña month of February, and I am not surprised to see the SER holding on. Modeling just jumped the gun wiping it out. We'll just have to wait to see if and when a better pattern returns. It should, but nothing is guaranteed.