and southward toward the continental U.S. This cross-polar air flow can translate to temperatures of about 20°F to 30°F below average for this time of year. What they're saying: "It is the ...

You see “U” shaped bends in the flow, which are large-scale storm systems. You also notice the end of the forecast indicates the polar vortex may be making another swipe at Michigan in mid ...

The setup process was painfully slow and glitchy during my testing, and the companion app, Polar Flow, feels like it’s stuck in the past despite offering lots of detailed metrics. Add to that ...