Wind pattern aloft 10,000 feet; low-level/surface temp distribution

Three “short waves” (brown lines) to impact Chicago over the next three days:

  • Will swing overhead Wednesday—moving east—brings extensive cloudiness and snow showers
  • Moves out of northwest overhead Thursday. Some cloudiness (main snow area north in Wisconsin) brings leading edge of bitter cold
  • Moves southeast over our area Friday—brings scattered clouds, but mainly carries bitter cold air into our area