Comments on: Winds have veered to southeast! http://www.underthemeso.com/blog/?p=936 Just another WordPress weblog Sun, 24 Jun 2012 16:41:54 +0000 hourly 1 http://wordpress.org/?v=3.0.3 By: Mike U http://www.underthemeso.com/blog/?p=936&cpage=1#comment-67924 Mike U Sat, 15 Aug 2009 21:02:37 +0000 http://www.underthemeso.com/blog/?p=936#comment-67924 Stephen: it is vigorous low level response to synoptic scale "dynamics". ahead of a vigorous shortwave trough like this, you would expect cyclogenesis ahead of it. The north-south topography enhances this cyclogenesis as strong cyclonically curved mid level wind flow crosses the terrain at nearly right angle (the leeside pressure trough component).. the other component is a diurnal one... elevated heating over terrain you tend to get upslope wind development, all else being equal. This all spells rapid pressure falls and subsequent dramatic shift in wind direction. The short-term NAM and RUC forecast this, and nailed it. this is fundamental meteorology at work here! north winds in the morning on the high plains isn't always a bad thing (so long as it's not frigidly cold and huge pressure rises to the north). The terrain has a huge play in all this. Stephen: it is vigorous low level response to synoptic scale “dynamics”. ahead of a vigorous shortwave trough like this, you would expect cyclogenesis ahead of it. The north-south topography enhances this cyclogenesis as strong cyclonically curved mid level wind flow crosses the terrain at nearly right angle (the leeside pressure trough component).. the other component is a diurnal one… elevated heating over terrain you tend to get upslope wind development, all else being equal. This all spells rapid pressure falls and subsequent dramatic shift in wind direction. The short-term NAM and RUC forecast this, and nailed it. this is fundamental meteorology at work here! north winds in the morning on the high plains isn’t always a bad thing (so long as it’s not frigidly cold and huge pressure rises to the north). The terrain has a huge play in all this.

]]> By: Stephen Locke http://www.underthemeso.com/blog/?p=936&cpage=1#comment-67923 Stephen Locke Sat, 15 Aug 2009 20:55:52 +0000 http://www.underthemeso.com/blog/?p=936#comment-67923 Hey Mike, How did you know the surface winds in Sidney would veer from north to southeast? When I look at surface maps for the day I would not have expected this shift given the position of lows and the cold front . . . Watching this from KC. -Stephen Hey Mike,

How did you know the surface winds in Sidney would veer from north to southeast? When I look at surface maps for the day I would not have expected this shift given the position of lows and the cold front . . .

Watching this from KC.
-Stephen

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