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Dan Rockwell
Joined: 10 Dec 2001
Posts: 1988
Location: Stamford, CT, USA |
 Wed May 22, 2002 5:49 am
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quote:
A blocking pattern is an interruption of the normal west-to-east flow at middle and high latitudes. It persists from one to several weeks.
Blocks occur in both hemispheres but much more often in the Northern Hemisphere, suggesting that the distribution of continents and oceans may play a role in their formation and maintenance.
In Volume II of Synoptic-Dynamic Meteorology in Midlatitudes, Howard Bluestein describes three kinds of blocks. His figures, illustrating Northern Hemisphere blocks, are reproduced here. Each figure traces the air flow at 500 millibars. The contours are labeled in tens of meters. A contour label of 552 indicates that the 500-millibar pressure surface along that contour lies 5,520 meters above sea level.
http://www.weatherwise.org/qr/qry.blocks.html
THE OMEGA BLOCK http://www.theweatherprediction.com/habyhints/144/ |
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Blue
Joined: 08 May 2002
Posts: 22
Location: Seattle, WA |
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Wed May 22, 2002 7:25 pm
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Ohhh...so THAT'S why it was 80 in Alaska. |
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Blue
Joined: 08 May 2002
Posts: 22
Location: Seattle, WA |
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Wed May 22, 2002 7:27 pm
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And snowing in California... |
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All times are GMT. The time now is Sat May 26, 2012 3:17 am
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