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Decoding bufkit data


Metsfan

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Hi all,

I am having difficulty in decoding bufkit data from the psu website. Does anyone have any good references to decode this infomation thanks.

ftp://ftp.meteo.psu.edu/pub/bufkit/nam_kisp.buf

1. If you want Bufkit to retirieve, decode, and then display the data then BufGet (with a "G") is your friend. You can access the program by clicking on the "Get Data" button at the top - right of the profile screen.

There is a 6-minute video turtorial avaialble here:

http://www.wdtb.noaa.gov/tools/bufkit/training/gs_bufget/gs_bufget.html

2. If you want to decode the data yourself then consider getting access to a GEMPAK manual as the profiles are created using GEMPAK.

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SNPARM = PRES;TMPC;TMWC;DWPC;THTE;DRCT;SKNT;OMEG;CFRL;HGHT

STNPRM = SHOW;LIFT;SWET;KINX;LCLP;PWAT;TOTL;CAPE;LCLT;CINS;EQLV;LFCT;BRCH

STID = KISP STNM = 725035 TIME = 121202/1200

SLAT = 40.82 SLON = -73.08 SELV = 21

STIM = 0

SHOW = 13.30 LIFT = 9.85 SWET = 200.80 KINX = -5.63

LCLP = 1015.15 PWAT = 13.16 TOTL = 29.46 CAPE = 0.00

LCLT = 277.55 CINS = 0.00 EQLV = -9999.00 LFCT = -9999.00

BRCH = 0.00

PRES TMPC TMWC DWPC THTE DRCT SKNT OMEG

CFRL HGHT

1023.50 5.04 4.81 4.51 290.57 308.66 1.24 0.10

0.00 40.92

1018.60 6.24 5.62 4.90 292.70 55.30 3.07 0.10

0.00 80.21

The BUFKIT profiles have a header that describes the parameters at each level above the ground. That's the first line in bold next to SNPARM, which also corresponds to the bold line of text just above the numeric data.

PRES is the pressure in hPa,

TMPC is the temperature in C,

TMWC is the wetbulb in C,

DWPC is the dew point in C,

THTE is theta-e in Kelvin,

DRCT is the wind direction,

SKNT is the wind speed in knots,

OMEG is omega in microbars per second,

CFRL is cloud cover and

HGHT is the height in meters

After the first ten elements, the parameters repeat at the next highest level above ground. Once you go through all of the levels, the data repeat at the next time. The STIM parameter gives the number of hours after the initialization of the model.

The sounding data for the NAM goes up to 84 hours, after which are the data that contains the precipitation and surface weather information for each time.

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