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2008-06-10 14:09 Thegreatdr 1024×613× (635604 bytes) {{Information |Description=Day 5 forecast of surface pressure across North America as well as the Pacific and Atlantic oceans |Source=http://www.wpc.ncep.noaa.gov/medr/day5nav.html |Date=2008-06-10 |Author=[[Hydrometeorological Prediction Center]] |Permis
{{Information
|Description={{en|Day 5 forecast of surface pressure across North America as well as the Pacific and Atlantic oceans}}
|Source=Transferred from [http://en.wikipedia.org en.wikipedia]<br/>
(Original text : ''http://www.hpc.ncep.noaa.gov/medr/
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The larger the delta(difference) between neighboring H and L pressure systems create a pressure gradient whose wind speed is directly proportional to the size of the delta.
C The larger the delta(difference) between neighboring H and L pressure systems creates a pressure gradient whose wind is directly proportional to the total value of the delta.