Important: The Climate Analysis Branch (PSD1) web site will be down in anticipiation of our major web restructuring starting Tuesday Jan 20th at 1pm MST.
You can find more info about the upcoming URL changes here.
You can find more info about the upcoming URL changes here.
PSD Map Room Weather Products
Forecasts of Teleconnection Indices
These indices are for four patterns of low-frequency tropospheric height variability, as classified in the study of Barnston and Livezey (MWR, 1987). The indices are based on centers-of-action of 500mb height patterns as defined below. The height fields are first spectrally truncated to total wavenumber 10 in order to emphasize large_scale variations. The circulation index of any particular day is a centered 3-day average. This again serves to emphasize the low frequency part of variability.
Last Update: Tuesday, 13-Jan-2009 22:48:23 MST- North Atlantic Oscillation(NAO) [(35-45N, 70W-10W) - (55-70N, 70W-10W)]
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NAO Composite Positive Phase Map - Western Pacific Oscillation(WPO) [(25-40N, 140E-150W) - (50-70N, 140E-150W)]
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WPO Composite Positive Phase Map
- Pacific North America Pattern (PNA) [(15-25N, 180-140W)-(40-50N, 180-140W)+(45-60N, 125W-105W)-(25-35N, 90W-70W)]
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PNA Composite Positive Phase Map
- Eastern Pacific Oscillation(EPO) [(20-35N, 160W-125W) - (55-65N, 160W-125W)]
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EPO Composite Positive Phase Map
NAO Composite Positive Phase Map
WPO Composite Positive Phase Map
PNA Composite Positive Phase Map
EPO Composite Positive Phase Map![North Atlantic Oscillation(NAO) [(35-45N, 70W-10W) - (55-70N, 70W-10W)]](https://webarchive.library.unt.edu/eot2008/20090114111031/http://www.cdc.noaa.gov/map/wx/images/nao.gif){kind=link}
![Western Pacific Oscillation(WPO) [(25-40N, 140E-150W) - (50-70N, 140E-150W)]](https://webarchive.library.unt.edu/eot2008/20090114111031/http://www.cdc.noaa.gov/map/wx/images/wpo.gif){kind=link}
![Pacific North America Pattern (PNA) [(15-25N, 180-140W)-(40-50N, 180-140W)+(45-60N, 125W-105W)-(25-35N, 90W-70W)]](https://webarchive.library.unt.edu/eot2008/20090114111031/http://www.cdc.noaa.gov/map/wx/images/pna.gif){kind=link}
![Eastern Pacific Oscillation(EPO) [(20-35N, 160W-125W) - (55-65N, 160W-125W)]](https://webarchive.library.unt.edu/eot2008/20090114111031/http://www.cdc.noaa.gov/map/wx/images/epo.gif){kind=link}
Compare Daily Forecasts of Teleconnection Indices
DISCLAIMER: We are not an operational center and are not staffed 24/7. We make every effort to provide the forecasts in a timely manner, but there is no guarantee that they will be updated everyday.