A large and very oddly shaped coronal hole has appeared on recent images of the Sun taken from various American space-based observatories (SDO, SOHO, and SXI shown below). The hole is distinctly triangular in shape and is pointed at the Earth. According to SpaceWeather.com, the solar winds from this hole should arrive at Earth around March 16-17.
Triangular coronal hole image taken by GOES 15 Solar X-Ray Imager