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| Model: |
GFS (Global Forecast System) Global Model from the "National Centers for Environmental Prediction" (NCEP) |
| Update: |
4 times per day, from 3:30, 09:30, 15:30 und 21:30 GMT |
| Greenwich Mean Time: |
12:00 GMT = 13:00 BST |
| Parameter: |
Geopotential height (solid line) Temperature (colored, dashed) at 500 hPa |
| Description: |
Geopotential height at 500 hPa (solid line)
Temperature at 500 hPa (colored, dashed)
The maps show the predominant tropospheric waves (trough or ridge).
They virtually control the ''weather'' (dry, warm / wet, cold) and the long waves
drive the smaller synoptic waves.
Thus, this upper-level chart illustrates the dynamics of our atmosphere.
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