Climate - Teleconnections

El Nino Southern Oscillation (ENSO)
Composite Precipitation and Temperature Impacts
Latest ENSO Observations
Daily SST Anomaly
Weekly SST Anomaly
Monthly SST Anomaly 
Seasonal SST Anomaly 
Observed Regions
OLR Anomalies
850 mb Wind Anomalies
200 mb Wind Anomalies

Latest ENSO Forecasts
CPC CFSv2 Nino 3.4 
CPC CFSv2 Nino 3.4 (PDF Cor) 
CPC CFSv2 Nino 3.4 (PDF&Spread Cor) 
NMME Nino 3.4 Forecast 
CFSv2 SST Seasonal Lead 1 
CFSv2 SST Seasonal Lead 2 
CFSv2 SST Seasonal Lead 3 
CFSv2 SST Seasonal Lead 4 

Arctic Oscillation (AO)
Composite Precipitation and Temperature Impacts - By Month
Observed/Forecast AO
Polar Vortex Cross Section

The Arctic Oscillation (AO) is compares 1000 mb height anomalies pole of 20N to those across the middle latitudes.

  • A positive AO suggests a stronger polar vortex with lower pressures near the pole, allowing the middle latitude jet stream to blow strongly and consistently from west to east, keeping colder air locked in the polar region.
  • A negative AO suggests higher pressures in the polar region, weaker zonal winds and the potential for acrtic air to move south into the middle latitudes. (1998 David WJ Thompson and John Michael Wallace)

North American Oscillation (NAO)
Obs. NH 500mb Anomalies
Observed / Ens Forecast NAO
Observed / GFS Forecast NAO
Affects on Weather - By Month

Pacific North American Oscillation (PNA)
Obs. NH 200mb Anomalies
Observed / Ens Forecast PNA
Observed / GFS Forecast PNA
Positive: Ridge (Warm) West and Trough (Cool) East. Negative: Trough (Cool) West and Ridge (Warm) East. Source
Maps By Month

Madden-Julian Oscillation
MJO Temperature Impact Composites
MJO Precipitation Impact Composites
Phase 1 during Hurricane season can indicate active period.
Obs. (GEFS) Forecast Phase
Obs. (GFS) Forecast Phase
Obs. (ECMWF) Forecast Phase
Obs. (Statistical) Forecast Phase
OLR Anomalies
850 mb Anomalies
700 mb Anomalies
850 mb Time Lon Winds
200 mb Time Lon Winds
OLR Time Lon

Stratospheric Warming
Zonal Temperature Time Series
Current 1-hPa Analysis
Current 2-hPa Analysis
Current 5-hPa Analysis
Warming usually leads to a cold snap and stronger troughs. Time Series Analyses and Forecasts