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Eta PV, Omega, Ageo Wind and Circulation, at 00z, 09/09
Outflow into the upper-jet
This is an Eta 0-hr cross-section of potential vorticity (green contours), omega (shaded, with warm colors showing ascent), ageostrophic streamlines (tan), and ageostrophic wind speeds (light blue contours), all valid at 00z, 9/09/04. Note the strong outflow from near the center of Frances' circulation (main PV anomaly) upward vertically and northwestward horizontally, feeding the upper-level jet.