A Case Study of Anomalous Snowfall with an Alberta Clipper

Figure 1

(a) 6-h Eta forecast of mean sea-level pressure (solid black, hPa) and 500-hPa geopotential height (solid red, gpm), valid at 1800 UTC 11 January 2004

(b) As in Figure 1(a), except 12-h forecast valid at 0000 UTC 12 January 2004

(c) As in Figure 1(a), except 18-h forecast valid at 0600 UTC 12 January 2004

(d) As in Figure 1(a), except 24-h forecast valid at 1200 UTC 12 January 2004