A Case Study of Anomalous Snowfall with an Alberta Clipper

Figure 8

(a) Plot of an ensemble of 27, 72-hour HYSPLIT backward trajectories from 250 m above ground level (AGL) at Buffalo, New York (denoted by the star), at 0300 UTC 12 January 2004, based upon 3-hourly NARR input. Each path is presented in a different color, with a marker every 6 hours on its path. Top (plan view) plot depicts parcel paths, while bottom is a hygrograph depicting how the relative humidity (%; ordinate) varies in time (every 6 hours; abscissa) for each trajectory

(b) As in Figure 8(a), except for 1500 m AGL

(c) As in Figure 8(a), except for 3000 m AGL

(d) As in Figure 8(a), except for 5400 m AGL