MEI Index DT MEI Data from NOAA and

MEI Index (DT) MEI Data from NOAA and CDC Current MEI Index Data MEI Index (CDC) MEI: The MEI can be understood as a weighted average of the main ENSO features contained in the following six variables: sea-level pressure, the east-west and north-south components of the surface wind, SST, surface air temperature, and total amount of cloudiness. The folks over at CDC - Climate Diagnostic Center have developed a more complete way of measuring ENSO events. . . be it a El Nino or La Nina event. The MEI or Multivariate ENSO Index (MEI) measure all El Nino and La Nina events on six main observed variables over the tropical Pacific. ( sea-level pressure. . . zonal surface winds…meridian surface winds. . . sea surface temperature. . . surface air temperature. . . and total cloudiness as a fraction of the sky

Multivariate ENSO Index (December 2006) “Over the past 6 months, the Multivariate ENSO Index (MEI) has most closely resembled that of 1951, 1963, 1976, 1979, 1986, and 2004. The following winters were, on average, warmer than normal in the Northern Plains and near normal elsewhere in terms of temperatures. ” Don S.

2006 MEI and Forecasted PDO Among the years that saw the MEI most closely resemble that of 2006 and saw a PDO > 0 in the winter, the warm anomaly in the Northern Plains and a cool anomaly in the East were especially pronounced: