CONTEST STATUS - Updated: SAT ... 14-APR-18 @ 9 PM EDT

Winter '17 / '18 - Snowfall Forecast Contests

19th Annual 'Regular Season' Snowfall Forecast Contest
- FINAL Results here
1st Place: Brad Yehl
2nd Place: Don Sutherland
3rd Place: NWS ER WFOs
HM: Herb @MAWS

17th Annual 'Season-total' Snowfall Forecast Contest
- FINAL Results here
1st Place: Don Sutherland
2nd Place: Mitchel Volk
3rd Place: Brad Yehl
HM: TQ
Climo: 5th place

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

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16th Annual 'Season-total'
FINAL results here

Tuesday, December 30, 2014

Winter '14 / '15 - Weakening Polar Vortex ==> Sudden Stratospheric Warming: UPDATE 4

OBS
Expanding area at 10 mb over Siberia (red shading) where the one-week temperature change exceeds 25°C.
 
10-hPa temperature change in a week in the Northern Hemisphere

The contour interval is 5 °C. The pink and light blue shadings indicate warming and cooling, respectively. The red shading denotes warming for values higher than 25 °C.
 
Imagery courtesy Tokyo Climate Center, Climate Prediction Division
 
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PROGS
The 12z / 29-DEC-14 ECMWF suggests the 'split-vortices' SSW portion of the current event will peak between 03 / 06-JAN-15 followed by displacement. on D+10.


Deep-layer easterlies depicted on 03-JAN.
Short-lived daughter vortices appear briefly at the 475K level on 06-JAN.

Displacement
 
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SSW TYPES 
 
 

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