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11-09-07 map discussion

15 Oct – 4 Nov 2007

0.5° GFS Analysis:

· 1000–500-hPa thickness, SLP, 700-hPa absolute vorticity, 700-hPa wind

· 500–200-hPa thickness, SLP, 300-hPa absolute vorticity, 300-hPa wind

· Geopotential height, temperature, wind, upward motion at 925, 850, 700, 500, 300, 250, and 200 hPa

· 700-hPa geopotential height, wind, total column precipitable water

· 1000–500-hPa thickness, SLP, 24-h SLP change

· Geopotential height forecast errors

24-h forecast: 200, 500, and 1000 hPa

48-h forecast: 200, 500, and 1000 hPa

72-h forecast: 200, 500, and 1000 hPa

· 140°–80°W cross sections of wind, potential temperature, and vertical motion

With Ertel PV: 15°N 17.5°N 20°N 22.5°N 25°N 27.5°N 30°N 32.5°N 35°N

With relative vorticity: 15°N 17.5°N 20°N 22.5°N 25°N 27.5°N 30°N 32.5°N 35°N

1.0° GFS Analysis:

· Streamfunction, nondivergent wind, full wind relative vorticity at 925, 300, and 200 hPa

· Velocity potential, irrotational wind, full wind divergence at 925, 300, and 200 hPa

· Potential temperature and wind on the 1.5-PVU surface (dynamic tropopause, “DT”), and 925–850-hPa layer-average cyclonic relative vorticity

· Pressure on the DT, DT-to-850-hPa shear, and 925–850-hPa layer-average cyclonic relative vorticity

· Ertel PV, pressure, and winds on 340-K and 350-K isentropic surfaces