This satellite image shows strong extratropical cyclone (pressure of ~960 millibars) as it swirls south of the Kamchatka Peninsula in the northwestern Pacific Ocean on March 21, 2014. A very long, well-defined front extends from the low over 3,500 miles southward towards the Philippines. The front is mostly a cold front, but it transitions into a stationary front as it starts to take on an east-west orientation at lower latitudes.
Here's a satellite image from the same time but zoomed in on eastern Asia.
[Images via MTSAT-2/Japan Meteorological Agency]