Here's the flow map I pieced together from a weather site, going to try to
incorporate this concept... just prettier. >.> Any ideas would be appreciated,
it's 4:28am and my creative juices ran dry a couple hours ago.

Best I can figure is to do little arrows like this, just lower the opacity and make
'em a little fuzzier/blurry. OR Larger transparent arrows, all stylized to fit the
period.