IEM Daily Feature
Thursday, 31 October 2002

Happy Halloween

Posted: 31 Oct 2002 08:14 AM

This weather is certainly no treat and I don't think it is a trick either. Shown is a temperature contour plot valid for this morning. This plot is showing what meteorologists call cold air advection. Notice how the wind field (black barbs) is perpendicular to the temperature gradient (contours).