NEW: Central US Winter Storms February 2021 UPDATED: Arctic Amplification UPDATED: Winter Storm Risk Increase Map: Atlantic and Gulf of Mexico SST Anomaly, March 12, 2017 by NOAA | NWS | NCEP | EMC Marina Modeling and Analysis Branch In the lead up to Winter Storm Stella, sea surface temperature anomalies in the Atlantic Gulf Stream are more than 7.2°F (4°C) above normal (anomaly from 1961-1990 climatology). Go to Site Related Events Northeast Blizzard March 2017