John Hammond

@hammondweather.bsky.social

Meteorologist - Presenter - Announcer - Newsreader - Trainer - Blogger: @vacayweather @weathertrending @BBCNews @BBCRadio4

Recent GFS runs strongly amplify tropospheric stationary waves by first week of Feb – including a Scandi–Greenland dipole pattern. That could weaken the currently very strong polar vortex, but the 101-member subseasonal IFS ensemble mean is above avg into March. As always, something to watch 👀

N Hemisphere MSLP anomaly map via wxcharts.com from the 18Z 28 Jan run of the GFS, valid 7 Feb. Deep low over Greenland and strong anticyclone over Scandinavia, plus a deep low west of the Aleutian Islands and downstream ridge.