There is almost no definite cyclone or anticyclone in the North
Atlantic and the only decent "dartboard" in the North Pacific is a low
with a core surface level pressure of about 990 mb.

https://www.fnmoc.navy.mil/efs/dynam...pac_gale_0.gif
https://www.fnmoc.navy.mil/efs/dynam...atl_gale_0.gif

I think that means a negative anomaly in both oceans. The Arctic has a
well defined High though, in the Gulf of Alaska.

There is a relative difference in core pressures for the same wind
speeds:
Dn Kn NA NWP

2.0 30 1009 1000
2.5 35 1005 997
3.0 45 1000 991
3.5 55 994 984
4.0 65 987 976
4.5 77 979 966
5.0 90 970 954
5.5 102 960 941
6.0 115 948 927

Dvorak Number - Knots - Pressure in Millibars - Altantic - Pacific.
http://en.wikipedia.org/wiki/Dvorak_technique

I suppose that is the last anomaly I aught to be interested in but it
IS interesting.