Mom! Weather Underground is telling me that it's currently 31.0°F and the wind is blowing from the northeast at 0 MPH. How can the wind be blowing from the northeast when it's not blowing at all?

If a car's stuck in a traffic jam, it's not moving but you can see which way it's pointing so you can assume it's going to resume moving in that direction when traffic clears (unless the driver puts it in the wrong gear). But that's not how the wind works. Just because the last detectable wind came from the northeast doesn't mean the next wind isn't going to come from a different direction all together. There are no "STAY IN YOUR LANE" or "NO U-TURNS" signs on the Aeolian Superhighway. Aeolus can drive his chariot wherever he damned well pleases!

Give it some thought after you've had your morning coffee and a couple of tokes. I patiently await your oh so wise reply.