MAPR observations of wind during a cold frontal passage at Erie CO on 2 April 2000. The animation shows a moving 3 hour window of 10 minute wind measurements starting at 10UT on April 2nd and running to 6UT on April 3rd. The clocks indicate the UT times at the start and end of the moving window. The front comes by at the surface at about 17UT, though the strongest winds can be seen aloft from about 22UT to about 4UT.