NCEP UPPER AIR RECEIPT MESSAGE FOR 20090121 18 UTC:
 TIME OF EXECUTION  Wed Jan 21 19:45:01 UTC 2009
 This webpage is updated every 30 min from 1:45 to 3:15 after 00 06 12 and 18 UTC.
 
 20674      21824      21946 A    23330      23955      24125 A   
 24266 A    24343 A    24641      24688 A    24726 A    24944 A   
 24959 A    25123 A    25400 A    25428 A    25913 A    28275     
 28698      29231      29572      29612      29634      29839     
 29862      30054      30554      30758      31004      31369     
 31538      31736      31770 A    31873      31977      32389 AB  
 32540 AB   

    
Group A (TTAA); Group B (TTBB [and PPBB]); Group C (TTCC, TTDD, [and PPDD]).
[Some stations report no PPBB/PPDD but report sig wind data in TTBB/TTDD.]
THKS means all required parts were in at this time with sufficient data. THANKS!
A capital letter means all required parts had data at this time for that group.
A small letter means reports received but some part had no data for the group.
A space means one or more required parts were missing from the group.
This message measures NCEP data receipt and reflects total system throughput.
Please retransmit missing reports, but DO NOT MAKE NUMEROUS RETRANSMISSIONS.
Check SDM and Gateway administrative messages for news on any comms problems.
Reference the "Thanks" Criteria for further details.