The Grimsvotn Volcano in Iceland is erupting. Plumes of ash have been blasted about 8.5 miles into the atmosphere.
Eruptions by Grimsvotn are not uncommon. Further activity which leads to ash and sulfur dioxide being added to the stratosphere may have winter consequences. High latitude volcanic activity is correlated with increased blocking during the winter.
No one is interested in another negative Arctic/North Atlantic Oscillation winter. Hopefully Grimsvotn will be consistent with past activity and finish it's eruption quickly.