DURING WED-THU GUIDANCE IS STILL HAVING DIFFICULTIES IN RESOLVING THE EVOLUTION OF A SHRTWV FCST TO CROSS THE ERN HALF OF THE CONUS.
Just a few things pulled out of the NOAA discussions which will effect the pattern in Europe.
ERN PAC/WRN
NOAM DETAILS BECOME LESS CERTAIN BY DAYS 5-7 FRI-SUN... WHICH IN TURN LEADS TO QUESTION MARKS WITH DOWNSTREAM FLOW.
Full discussions here:
http://www.hpc.ncep.noaa.gov/preepd/preepd.html
The ECM relies on more amplification upstream to cut that low se'wards, earlier the phasing of that shortwave into the main Canadian troughing will effect how much of a ridge develops in the Atlantic, until theres agreement on them then all the output is liable to chop and change.
Quote selectie