The HHXF30 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HH): Height A1 (X): Global Area (area not definable) A2 (F): 30 hours forecast T1ii (H30): 300 hPa (Remarks from Volume-C: H+ 30 (GLOBAL MODEL) HEIGHT 300 HPA)

The HHXN30 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HH): Height A1 (X): Global Area (area not definable) A2 (N): 108 hours forecast T1ii (H30): 300 hPa (Remarks from Volume-C: H+ 108 (GLOBAL MODEL) HEIGHT 300 HPA)

The HVXX30 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HV): Northward wind component A1 (X): Global Area (area not definable) A2 (X): Not assigned T1ii (H30): 300 hPa (Remarks from Volume-C: H+ 66 (GLOBAL MODEL) WIND COMPONENT 300 HPA)

The PHOA30 TTAAii Data Designators decode as: T1 (P): Pictorial information (Binary coded) T1T2 (PH): Height A2 (A): Analysis (00 hour) T1ii (P30): 300 hPa (Remarks from Volume-C: 300, 200 hPa H with plotted observations)

The HHXC30 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HH): Height A1 (X): Global Area (area not definable) A2 (C): 12 hours forecast T1ii (H30): 300 hPa (Remarks from Volume-C: H+ 12 (GLOBAL MODEL) HEIGHT 300 HPA)

The HUXX30 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HU): Eastward wind component A1 (X): Global Area (area not definable) A2 (X): Not assigned T1ii (H30): 300 hPa (Remarks from Volume-C: H+ 66 (GLOBAL MODEL) WIND COMPONENT 300 HPA)

The HHXR30 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HH): Height A1 (X): Global Area (area not definable) A2 (R): 156 hours forecast (7 days) T1ii (H30): 300 hPa (Remarks from Volume-C: H+ 156 (GLOBAL MODEL) HEIGHT 300 HPA)

The HVXO30 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HV): Northward wind component A1 (X): Global Area (area not definable) A2 (O): 120 hours forecast (5 days) T1ii (H30): 300 hPa (Remarks from Volume-C: H+ 120 (GLOBAL MODEL) WIND COMPONENT 300 HPA)

The HTXL30 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HT): Temperature A1 (X): Global Area (area not definable) A2 (L): 84 hours forecast T1ii (H30): 300 hPa (Remarks from Volume-C: H+ 84 (GLOBAL MODEL) TEMPERATURE 300 HPA)

The HHXM30 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HH): Height A1 (X): Global Area (area not definable) A2 (M): 96 hours forecast T1ii (H30): 300 hPa (Remarks from Volume-C: H+ 96 (GLOBAL MODEL) HEIGHT 300 HPA)