MTEOR 417/517 WEEK 2 SUPPORTING MATERIAL

Week 2 - Cold-air damming and Lake-Effect Snow

Both are two major mesoscale wintertime events

Lake Effect Snow

A major forecasting concern downwind of the U.S. Great Lakes, and the Great Salt Lake

• Great COMET Tutorial on lake effect snow
• Radar example from powerful single-lake band
• Radar example from multiple bands
• Satellite example of L.E.
• Ongoing BUF-NWS LES study

  Cold Air Damming

  A forecasting concern to the lee of the Appalachians and Rockies

• COMET module on Cold Air Damming
• Surface map from March 1976 cold air damming event
• 500 mb map from March 1976 cold air damming event (12z)
• Surface map (Eta prediction) showing cold air damming signature
• Surface temperatures showing cold air damming signature
• 850 mb map during cold air damming event
• 500 mb map during cold air damming event
• Extreme frz rain/sleet sounding showing v. shallow low-level arctic air

Lab 2 2008 maps

• MSLP, thickness, winds
• 850 mb map of T and Z
• 700 mb map of T and Z
• 500 mb map of T and vort