dat zie je toch ook niet elke dag, jammer dat het zo westelijk is
here seems quite alot of uncertainty in the eastern Pacific which effects downstream ridges and troughing, this will effect the eastern USA trough which in turn effects the pattern in Europe.
The updated NOAA preliminary discussions talk about this:
OUR LATEST UPDATED PROGS HAVE MADE CORRECTIONS TO THE 500MB PATTERN ALONG THE W COAST THAT HAVE SHIFTED AWAY FROM THE EARLY BLEND OF 80% GEFS ENSEMBLE MEAN TO BEING 40% EACH OF THE ECENS
MEAN AND GEFS MEAN BY DAYS 5-7. THE REMAINING 20% OF THE BLEND IS THE CANADIAN GLOBAL. RECEIPT OF LATEST ENSEMBLE SPAGHETTI PLOTS HIGHLIGHTED A POTENTIALLY BIG PROBLEM SHOWING UP OVER THE NE
PACIFIC AND WRN NOAM DAYS 5-7. THE ECMWF IS DEVELOPING A NEW TROF
NEAR 130W THU-SAT OFF THE VANCOUVER /BRITISH COLUMBIA AREA. WE
SUSPECT THAT THE ECMWF MAY BE CORRECT IN LOWERING HEIGHTS DAYS 5-7 IN A BROAD AREA OFF THE W COAST OF NOAM...BUT WE ARE NOT SURE
ABOUT HOW RAPIDLY THE FALLS WILL ERODE THE RIDGE ALREADY IN PLACE OVER SWRN CANADA AND THE PACIFIC NW. UPDATED MANUAL PROGS WERE ADJUSTED TO REFLECT LOWER PRES OVER THE PACIFIC NW IN CONJUNCTION
WITH THE GREATER HEIGHT FALLS EXPECTED IN THAT AREA.
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