Tropopause pressure and wind, 500-300 mb PV advection
Notes:
Forecasts of tropopause level potential vorticity indicated that 2 upper level waves would effect the area during the 25th and 26th. The first wave would lift north across the area early on the 25th. The second, stronger wave would swing in from the east early on the 26th. Forcing for upward motion can be inferred in areas of potential vorticity advection, shaded green and yellow on these slides.|
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Valid Thu 0000 UTC 25-Feb-2010 Valid Thu 0600 UTC 25-Feb-2010 Valid Thu 1200 UTC 25-Feb-2010 Valid Thu 1800 UTC 25-Feb-2010 Valid Fri 0000 UTC 26-Feb-2010 Valid Fri 0600 UTC 26-Feb-2010 Valid Fri 1200 UTC 26-Feb-2010 |
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Slide 8