Phase Diagram (left): The average projection of 250-hPa zonal wind anomalies onto the NPJ phase diagram during an individual 72-h period in which the NPJ was characterized by the jet regime listed in the title of the phase diagram is indicated with a red 'x'.
The numbers in the blue boxes identify the number of periods characterized by an individual jet regime (i.e., residing in the same quadrant of the phase diagram with a distance of at least 1 PC unit from the origin) for at least 72-h during 1979-2014 in the CFSR.
Synoptic Maps (right): The composite flow evolution beginning 10 days prior to the initiation of a continuous 72-h period characterized by the jet regime indicated in the NPJ phase diagram and ending 10 days after the initiation of the jet regime indicated in the NPJ phase diagram.
Variables shown include (1) 250-hPa wind speed, geo. height, and geo. height anomalies, (2) 500-hPa relative vorticity, geo. height, and geo. height anomalies, (3) 700-hPa geo. height, precipitable water, and precipitable water anomalies (4) mean sea level pressure, 1000-500-hPa thickness, and 850-hPa temperature anomalies.