Saturday, January 8, 2011
Mind-Boggling High Building
The models have been all over this for days now. What will be the strongest high aloft ever recorded over northern Alaska outside of summer is building this weekend. At Barrow the highest 500mb height ever measured in January is 566dm (data since 1946). The 12Z GFS is forecasting max 500mb heights for this event at Barrow of 580dm, 583dm at Kotzebue and 584dm at Ambler. At Fairbanks GFS has max height of 577dm, which would be a January record.
This will also be another nice example of how very high surface pressures will not be associated with particularly low surface temperatures. Image from the 1200 UTC Jan 08 ECMWF valid 3am AST Tuesday, from Plymouth State.