The blocking ridge at 500 mb over the eastern Pacific and western North America is proving to be very persistent. While this may make the MAP winter weather lovers happy back East, it is leaving the Southwest high and dry! I've posted above the GFS ensemble mean heights and anomalies for 500 mb at 60, 120, and 180 hours from 00 UTC last evening. The ridge hangs in there through the period and is actually very impressive by 180-hours, with height anamolies reaching around 300 m over west Canada! Guess the main thing I'll be recording in my journal rest of month will continue to be low temperatures.
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