hello
this can be a simple wrapper to get your data
D=readlines('data.txt'); % read as string array
ixP1=find(contains(D,'HGHT')); % find the HGHT line sections
eof = numel(D);
% get first the long lines data corresponding to PRES TMPC TMWC DWPC THTE DRCT SKNT OMEG
n = 0;
for k=ixP1(end)+1:2:eof
n = n +1;
out1(n,:)=str2double(split(D(k)))';
end
% then get the short lines data corresponding to HGHT
n = 0;
for k=ixP1(end)+2:2:eof
n = n +1;
out2(n,:)=str2double(split(D(k)))';
end
% horizontal concatenation
Out = [out1 out2];
