CONTEST STATUS - Updated: WED ... 13-DEC-17 @ 8:30 PM EST

Winter '17 / '18 - Snowfall Forecast Contests
19th Annual 'Regular Season'
Snow Storm #1
Synoptiscope in VCP32

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

Tuesday, January 27, 2009

Sudden Stratospheric Warming - Close @ Hand

Defined as a complete disruption / reversal of the polar vortex @ 60°N... a well-forecast MAJOR stratospheric warming appears close-at-hand.

The vortex has bifrucated @ 10 mb on JAN 24...30 mb on JAN 27...and is poised to reach 50 mb level in a few days.

The event gets a quick mention in WSI/s latest winter update...

""An incipient stratospheric warming event, which appears to be historic in magnitude, may continue to favor more Arctic air masses in mid-latitudes and increases confidence in the widespread cold forecast of the US these upcoming few months.""

Upper air plots courtesy Univeristy of Wyoming/s Department of Atmospheric Science


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