Model Diagnostic Discussion NWS Weather Prediction Center College Park MD 1144 PM EST Tue Jan 30 2018 Valid Jan 31/0000 UTC thru Feb 03/1200 UTC ..See NOUS42 KWNO (ADMNFD) for upper air ingest status... Please refer to the WPC QPFPFD precipitation forecast discussion for details on model preferences and system timing until the next PMDHMD is issued at 1645 UTC. Previous model trends at www.wpc.ncep.noaa.gov/html/model2.shtml Previous 500 mb forecasts at www.wpc.ncep.noaa.gov/h5pref/h5pref.shtml