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Message: Re: Surface Pres at specfied terrain elevation?
Posted by Stan Benjamin on 22 Sep 00, 15:27 MT, in response to Surface Pres at specfied terrain elevation?, posted by Walter Rogers on 22 Sep 00, 14:12 MT
The pressure at the bottom of the ASCII soundings from RUC/MAPS is indeed the sfc pressure (not reduced, not standard atmos). It also gives you the elevation, as you've noted. You can also calculate the standard atmosphere pressure for that elevation. Then you can get your 'D' departure pressure. The MSLP reduction involves 700 mb temps and would be messy to use for your purpose, I think. Since your first sentence says what you really want is the sfc pressure, then you can just use the first value from the ASCII sounding directly.
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