INTERPRETATION OF THE NGM 
BASED MOS FORECAST MESSAGE
CLDS
  CL - Clear
  SC - Scattered
  BK - Broken
  OV - Overcast

QPF format "A/B"
A - Value for 6-h period
0 = no precipitation
1 = 0.01 - 0.09 in.
2 = 0.10 - 0.24 in.
3 = 0.25 - 0.49 in.
4 = 0.50 - 0.99 in.
5 = > 1.00 in.

B - Value for 12-h period
0 = no precipitation
1 = 0.01 - 0.09 in.
2 = 0.10 - 0.24 in.
3 = 0.25 - 0.49 in.
4 = 0.50 - 0.99 in.
5 = 1.00 - 1.99 in.
6 = > 2.00 in.

SNOW format "A/B"
A - Value for 6-h period
0 = no snow
1 = trace - < 2 in.
2 = > 2 in.

B  - Value for 12-h period
0 = no snow
1 = trace - < 2 in.
2 = 2 - < 4 in.
4 = 4 - < 6 in.
6 = > 6 in.

CIG
1 = < 200 ft.
2 = 200 - 400 ft.
3 = 500 - 900 ft.
4 = 1000 - 3000 ft.
5 = 3100 - 6500 ft.
6 = 6600 - 12000 ft.
7 = > 12000 ft.

PTYPE
  Z - Freezing or
      Ice pellets
  R - Liquid
  S - Snow

VIS
1 = < 1/2 mile
2 = 1/2 - 7/8 mlle
3 = 1 - 2 3/4 miles
4 = 3 - 5 miles
5 = > 5 miles

OBVIS
H - Haze
F - Fog
N - No haze, or fog