Wednesday, December 09, 2009

Rapid Deepening of the Upper-Midwest Cyclone


The cyclone bringing the blizzard and severe winter storm to the central US deepened rapidly during the night. At 00Z last evening it had a central pressure of ~994 mb. This morning it has moved to near Milwaukee (see above) and deepened to ~978 mb. Thus, the storm has been deepening at more than a mb an hour - very impressive.

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