(a) 700 hPa
(b) 500 hPa
(c) 200 hPa
Figure 2: Geopotential height (solid) and wind barbs from the NCEP FNL analysis at 0600 UTC 21 July 2012 at (a) 700 hPa and (b) 500 hPa with the relative humidity exceeding 90% shaded, (c) 200 hPa with the horizontal divergence less than −5 × 10−5 s−1 shaded.