Sunday 11 May 20 – Nimbostratus

Herne Bay, cold gale force winds blow straight of the North Sea and pound the beach.  Overcast conditions with rain bearing strato-form cloud.  Satellite image shows the cold front extending across the North Sea.  We can’t see the full vertical extent of the cloud on the surface but the rain tells as that it must be a deep layer, hence Nimbostratus.

Earlier in the morning we could see the medium and upper level cloud heralding the advancing front.


High pressure remains the dominant pressure pattern.  The strength of the winds is surprising given the spacing of the isobars.  This is an example of anticyclonic curvature where for strong curvature around a high, the wind is greater than would be expected by measuring the isobaric spacing.  Cyclonic curvature also exists, the wind around a depression is less than would be expected from the isobaric spacing.

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