ECM & GFS mean height anomalies for day 10:
(onderaan te vinden)
GFS better linkage with the Arctic High, ECM much flatter but ridge displaced well north of its usual position.
EC wat vlakker, maar wel genoeg noordelijk
As a mean solution, both look good and there's a notable shift in emphasis from Scandinavian ridge to mid Atlantic at t192. That leaves us in a solid mean trough solution, which could range from anything between -2 and -8C below normal.
Er is een duidelijk verandering van een Scandinavische rug naar een op de Atlantische Oceaan.
Both models suggest a developing strongly -ve AO and we are likely to get several model runs suggesting a link between the two, which might temporarily happen. I think those spread suggesting height rises between southern Greenland, Iceland and Scandinavia are not far off the mark, The long term solution I think is for the Arctic ridge to migrate towards Svalbard and northern Scandinavia, setting us up for a big easterly end of the month (that's after a northerly / north-easterly phase).
Beide modellen suggereren een sterke negatieve AO en we kunnen diverse runs een samenvoeging tussen Atlantisch Hoog en Scandinavisch. Oplossingen die hogedruk intekenen tussen het zuiden van Groenland/ Ijsland en Scandinaviƫ zitten dichtbij de 'oplossing'. Tweede helft van de maand gaat het Arctische hoog richting Spitsbergen en noord Scandinavie waardoor wij een oostelijke stroming krijgen.
http://forum.netweather.tv/topic/72437-model-discussion-chat-and-commentary-feb-2nd/page__st__240__p__2242040#entry2242040
NOAA had vanmorgen ook bericht over rug op de Atlantische Oceaan.
Voorlopig geen zacht weer. Dat bleek al uit de pluim vanmorgen en de diverse opers (UKMO144u matig). Wel zit er volgens NOAA een transitie in. Van hogedruk ten NO van ons, naar meer NW. Zoiets als de EC oper vanmorgen liet zien.
Regarding the upstream pattern, comments from NOAA certainly don't suggest a return to milder conditions.
AT LEAST ON A LARGER SCALE MODELS AGREE THAT A LARGE MID LEVEL HEIGHT ANOMALY WILL BECOME ESTABLISHED OVER THE NORTH CENTRAL ATLANTIC TOWARD THE END OF THE PERIOD...WHICH THEN TELECONNECTS WITH A MEAN TROUGH OVER THE NORTHEAST/NEW ENGLAND AND SMALLER BUT STILL SIGNIFICANT MEAN RIDGE OVER THE NORTH AMERICAN ROCKIES.
That ties in very well with those ECM ensemble spreads I posted earlier, the transition from blocking over Scandi to blocking to the nw is likely to throw the models for a while as they try and plot a course to that.
http://forum.netweather.tv/topic/72437-model-discussion-chat-and-commentary-feb-2nd/page__st__240__p__2241907#entry2241907
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