Figure 1. Interpretation of ETA Direct Model Output Guidance
NMCFRH80
FOUS80 KWBC 281200
OUTPUT FROM ETA 12Z AUG 28 95
TTPTTR1R2R3 VVVLI PSDDFF HHT1T3T5
ROA//969130 02501 071722 73191610
06020858728 01198 032413 74221610
12000714309 00601 082921 70201309
18000712716 2106 132918 67160910
24000782815 0810 143017 65130811
30000503112 1806 173007 65191110
36000392614 1008 173109 68211311
42000402722 2009 203203 68211411
48000442929 0209 212208 69201312
EXAMPLE
note that the station identifier ROA is given at the 00-hour projection.
TT : Forecast projection (hours);06
PTT: 6-hour accumulated precipitation (hundredths 0.20"
of inches).
R1: Relative humidity (%) of surface layer with a 85% depth of approximately 35 mb.
R2: Mean relative humidity (%) from approximately 87% 35 mb above the surface to 500 mb.
R3: Mean relative humidity (%) from approximately 28% 500 mb to tropopause.
VVV: Vertical Velocity (tenths of microbars/second) 1.1 µb/s
at 700 mb;
positive numbers denote rising air;
negative numbers denote subsidence;
-99 is the lowest value coded in the message;
actual VV may be lower than this value.
LI: Six layer lifted index ( C); -2 C negative values are added to 100.
PS:Sea level pressure (mb); 1003 mb leading 9 or 10 is not encoded.
DDFF: Wind direction (tens of degrees) and speed 240 at
(knots) in surface layer with a depth of 13 knots
approximately 35 mb.
HH: 1000-500 mb thickness (decameters); 574 dm leading 4 or 5 is not encoded.
T1: Temperature (C) of surface layer,approximately 35 mb in thickness, 22 C ; negative values are added to 100.
T3: Temperature (C) of layer centered
approximately at 900 mb, 16 C; negative values are added to 100.
T5: Temperature (C) of layer centered
approximately at 800 mb, 10 C; negative values are added to 100.