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

Wednesday, November 25, 2009

Winter '09 / '10 - Pattern Change

NWP has been hinting at a change in the flow regime for some time.  As early DEC draws near...more and more evidence points toward the arrival of winter wx.



ECMWF height-latitude cross-section forecast for 01-DEC depicts deep layer easterlies near the North Pole...supporting the -AO forecast from the GFS shown above.   Note the long period (into week2) where AO remains well-below zero.



Cold pool aloft shown over central Canada in the 100-mb height-field.  Warm stratosphere ==> cold troposphere.



Excellent antecedent conditions for the season/s 1st coastal teaser.  500 mb heights are a little high but with the 'event' still a week away...taking it one step at a time.  Never want the progs looking too good this far out.


No comments: