Re: Track of Global Hawk as of 12:07am EDT
Posted by Chris in Tampa on 8/30/2016, 1:29 am
You can see how many sondes made it into the GFS by going here:
http://www.nco.ncep.noaa.gov/pmb/nwprod/realtime/

Under "Model Data Dump Tables", and under that "GFS", you will see:
00z, 06z, 12z, 18z

You can see which run of the GFS is current, or the one you want to look at, here:
http://www.tropicaltidbits.com/analysis/models/?model=gfs&region=atl&pkg=mslp_pcpn_frzn
Or: http://mag.ncep.noaa.gov/model-guidance-model-area.php

Then on the page after you have clicked the specific run (00z, 06z, 12z, 18z) you will see a while bunch of stuff. Sondes are under "dropw". I don't know which specific storm the data came from, just the total. High number for the run 0Z (8pm EDT), for each day of the month, was when the Global Hawk was out sampling Gaston. But there have been sondes in Nine and Eight too from the Air Force and NOAA, which are also in some of these days too, those agencies just usually have less sondes, unless the NOAA G-IV goes out, in which case they also release a lot of sondes. And when Madeline in the Central Pacific gets recon Tuesday, its sondes will also appear in the various runs.

So for each run this month:

0Z: http://www.nco.ncep.noaa.gov/pmb/nwprod/realtime/gfs/t00z/gfs.015.gif
6Z: http://www.nco.ncep.noaa.gov/pmb/nwprod/realtime/gfs/t06z/gfs.015.gif
12Z: http://www.nco.ncep.noaa.gov/pmb/nwprod/realtime/gfs/t12z/gfs.015.gif
18Z: http://www.nco.ncep.noaa.gov/pmb/nwprod/realtime/gfs/t18z/gfs.015.gif

I forget where the text data is for how many sondes were added. You kind of have to guesstimate from that graphic.

For the 0Z run of the GFS on August 30th (8pm EDT August 29th) there appear to have been 15 sondes added. The first sonde tonight from the Global Hawk tonight was from 8:41pm EDT, when it splashed down in the water. I don't know how long sonde data takes to get into the models from after being available. Whether there is review first. At what point is it too late to add a sonde to a run, as soon as it starts, a little later while it is processing? I don't know.

The sonde takes a long time to come down from the Global Hawk. I never really paid attention before.

The first sonde tonight was launched at 8:24:35pm EDT from a height that was at least greater than 54,692 feet. It didn't reach the surface until 8:41:34pm EDT. (the sondes have little parachutes) It beams data until just before it hits the surface or until it terminates, due to some malfunction.
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Nine at 11pm EDT Mon: "Depression becoming a little better organized over" southeastern Gulf - Chris in Tampa, 8/29/2016, 11:57 pm
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