HYSPLIT Forum: hysplitbbs.arl.noaa.gov

Hi,Sir,

I want to get some meteorological data of specific date, for example 2013-09-08, from NAM 12km. I am eager to know the friction velocity, air temperature, relative humidity and solar radiation from 8am to 18pm , but I did not find them on the http://www.ready.noaa.gov/ready2-bin/metgram1a.pl, could you help me?

Many thanks.

You might want to choose a "sounding" from the menu. Once you obtain the graphic you can download the text file that contains that data corresponding to the station of your choice.

Hi sir,

I want to get the friction velocity of wind on sept.8th,2013 and sept 16th,2013 in NAM ,and what should I do?

Many thanks

Look for the variable USTR.

Hello sir,

In the NAM12KM file , is there solar radiation ?

Look for DSWF

Hi sir,

In the NAM 12km file, the unit of ustr is m/s ? are there the standard dedivations of horizontal and vertical wind speed(turbulence intensity) in the NAM 12km file?

Many Thanks.

Hi sir,
In the Nam 12km file ,this line

1068 13 9 815 3 099USTR 0 0.3937008E-02 0.1518861E+00

means 2013-09-08 15:00 UTC at the height of 99m, the stdev of ustr is 0.3937008E-02, and average of ustr is 0.1518861E+00 ?
"1068 13 9 815 3 " , "3" means what?

Many thanks.

USTR is in m/s (see http://www.ready.noaa.gov/READYflddesc.php )

You can see what fields are in the data set using this web site (look for NAM 12 sigma-pressure hybrid ) http://www.ready.noaa.gov/READYmetdata.php

You can find details on what the 50 byte ASCII header means by viewing page 55 of the HYSPLIT user guide at http://www.arl.noaa.gov/documents/repor ... _guide.pdf

Glenn