CONTEST STATUS - Updated: SUN ... 21-JAN-18 @ 8 PM EST

Winter '17 / '18 - Snowfall Forecast Contests

19th Annual 'Regular Season'

- Interim Standings ... as of Snow Storm #3 here

- Snow Storm #4
Synoptiscope in VCP32

- Snow Storm #3
FINAL Results here

- Snow Storm #2
FINAL Results here

17th Annual 'Season-total'
Deadline for entries has passed
Forecasters' summary here

Winter '16 / '17 - Snowfall Forecast Contests
18th Annual 'Regular Season'
FINAL results here
16th Annual 'Season-total'
FINAL results here

Sunday, February 25, 2007

Contest # 2 - Early Obs

The heavy snowfall over IAD / DCA / BWI earlier today was missed by all forecasters. PNS from LWX reported 2.9" at DCA with IAD and BWI each picking up 4.5". SN:H2O about 8:1 in the DC area...~10:1 at BWI.

Forecast soundings had depicted a relatively deep layer from ~1500 to 3500' AGL where the temperature was right at 0°C. 85H WAA ordinarily would have pushed the temperature trace to above freezing causing the snow to melt. Add to that the SE SFC wind with temperature at or slightly above 32°F should have spelled doom for well.

Strong UVM associated with the passage of the diffluent mid-level trof could have been reponsible for the dynamic cooling that keep the precipitation frozen all the way to the ground.

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