30-day loop of analyzed 200-hPa
heights and anomalies. An eleven-day mean, centered on the date indicated in
the title, of 200-hPa heights and anomalies from the NCEP Climate Data Assimilation System
(CDAS), is shown for the first 25 days of the animation. 10-, 9-,
8-, 7-, and 6-day running means are shown for the last 5 days,
respectively. Contour interval for heights is 120 m, anomalies are indicated by shading.
Anomalies are departures from the 1991-2020 daily base period means.