Wave Packet Diagnostics for Winter TPARC and WSR

Generated by Edmund Chang (assisted by Yanjuan Guo), Stony Brook University

 

Introduction

The method to compute the wave packet envelope can be found in section 2c of Chang and Yu (1999): “Characteristics of wave packets in the upper troposphere. Part I: Northern Hemisphere Winter”. J. Atmos. Sci., 56, 1708-1728. For an introduction about what wave packets are and the applications of wave packet diagnostics, click here.

            Hovmoller diagram from Jan 13 – Feb 16 (2009)          Forecast Validation Statistics (Jan 2009)

            Hovmoller diagram from Jan 13 – Feb 21 (2010)          Forecast Validation Statistics (Jan 2010)

Wave Packet Diagnostics (based on GFS 16-day control forecast)

Yesterday 00Z

Yesterday 12Z

Today 00Z

Today 12Z (usually available after 1 pm EST)

Diagnostics before yesterday

 

            Diagnostics for Southern Hemisphere

Back to Edmund Chang’s home page

NCEP winter TPARC web page