Upper-level composite maps of 850-hPa isotachs and 700-hPa isoheights during warning-level and advisory-level events
Figure 20. Upper-level composite maps of 850-hPa isotachs (m s-1) during (top left) warning-level events and (top right) advisory-level events; 700-hPa isoheights (m) during (middle left) warning-level events and (middle right) advisory-level events; and 250-hPa isotachs (m s-1) during (bottom left) warning-level events and (bottom right) advisory-level events.
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