Medium Range Forecast (MRF) Model 2 002057 Prior soundings (within 3 hours of current time) 4 002057 Missing value 15 002057 Climatology 5 002057 2014-09-03T09:53:44.764Z Nested Grid Model (NGM) 0 002057 Global Data Assimilation System (GDAS) Forecast Model 3 002057 Origin of first-guess information for GOES-I/M soundings Aviation Model (AVN) 1 002057 1