CONTEST STATUS - Updated: TUE ... 23-APR-19 @ 12:10 PM EDT

Winter '18 / '19 - Snowfall Forecast Contests
20th Annual 'Regular Season' Snowfall Forecast Contest
FINAL Results here

---
18th Annual 'Season-total' Snowfall Forecast Contest
FINAL Results HERE
Forecaster verification table HERE

---------------------------------------------------------
Winter '17 / '18 - Snowfall Forecast Contests
---------------------------------------------------------
19th Annual 'Regular Season'
FINAL results HERE

---
17th Annual 'Season-total'
FINAL results HERE

Wednesday, December 19, 2007

Return of Hi-Latitude Easterlies

Note the ECMWF/s D+8 forecast for the return of deep tropospheric...hi-latitude easterlies over the pole suggesting a return of a negative AO index toward the end of DEC.

The time-height section also shows the 70mb mean zonal wind from the east over the Equator...indicating the negative QBO.

Negative QBO favors a negative AO...which is associated with a less stable...and slower polar vortex. These conditions present good opportunities for arctic outbreaks....storminess...and the potential for hi-latitude blocking.

No comments: