"Mostly Sunny" skies have dawned gray and somewhat dreary under heavy cirrus streamimg in from the northwest, as a very strong shortwave at 500 mb moves across the northern and central Rockies. Top image shows morning view of Catalinas and middle image shows current, visible satellite image of the cirrus covering southern Arizona. -----------------------------------
As the shortwave consolidates and moves east away from the Rockies, it appears that a Colorado Front Range windstorm is imminent, as well as a big blow for the western Great Lakes, as mentioned in an earlier post. Bottom image shows the current NAM 850 mb forecast for 00 UTC tomorrow evening. Very spectacular system with very low central heights. The surface forecast is now indicating a surface pressure with this cyclone of near 960 mb! Batten down the hatches across the northern tier of states.
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