The map depicts current wind conditions, when you log on. The swirls are generally centered on frontal systems -- the counterclockwise swirls are the lows, where cold air is descending and turning to the left due to the coriolis effect of earth's rotation, and the clockwise rotations are high pressure areas (of generally good weather) where warm air is lifting and spinning to the left.
Our daughter is a GIS (Geographic Information Systems) specialist and she forwarded on this map to me knowing I am interested in weather and mapping.
I find rotating the map (click, hold, and drag) into a view from the south pole yields a wonderful artistic view of wind patterns circulating now around the south polar regions.
Earlier wind views of North America were showing he polar vortex and the bands of arctic cold moving through the midwest into the east coastal regions, as the warm arctic regions spalled off the cold bands down to Chicago, Atlanta, etc.
The effects of global warming being reported in research articles by my geology colleagues is reflected in these wind patterns as well.
I have been in contact with geologists in universities discussing the need to revise what is being taught now in many geology courses, and how it differs from what we learned many years ago as geology undergrads. We live in a different world today from the world we knew in college.
Paleoclimatology was important background for my professional work in managing ground water resources in arid regions -- much of the groundwater in Nevada was a 'remnant' of past climatic cycles, and today's changing cycle is having a huge effect on movement and storage of groundwater today.
It might be of interest to some, off the boating subject, that scientists can age date the water you drink. It was fascinating to me to discover that much of the groundwater I was drinking (derived from deep wells) in central Nevada fell as rain at a time long before my father was born!
We were tracking the age and movement of groundwater in the area of underground nuclear testing to see how long it would be before you would start glowing in the dark. Urg!