Chapter 13, Annex S WORLD METEOROLOGICAL ORGANIZATION CODE FOR PRESENT WEATHER
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QUALIFIER |
WEATHER PHENOMENA |
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INTENSITY or PROXIMITY 1 |
DESCRIPTOR 2 |
PRECIPITATION 3 |
OBSCURATION 4 |
OTHER 5 |
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Note: Precipitation intensity refers to all forms combined. |
MI |
Shallow |
DZ |
Drizzle |
BR |
Mist (Vis ≥ 5/8 SM) |
PO |
Dust/sand Whirls (Dust Devils) |
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BC |
Patches |
RA |
Rain |
FG |
Fog (Vis < 5/8 SM) |
SQ |
Squalls |
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PR |
Partial |
SN |
Snow |
FU |
Smoke (Vis ≤ 6 SM) |
+FC |
Tornado or Waterspout |
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DR |
Drifting |
SG |
Snow Grains |
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- Light |
BL |
Blowing |
IC |
Ice Crystals (Vis = 6 SM) |
DU |
Dust (Vis ≤ 6 SM) |
FC |
Funnel Cloud |
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SH |
Shower(s) |
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Moderate (no qualifier) |
TS |
Thunderstorm |
PL |
Ice Pellets |
SA |
Sand (Vis ≤ 6 SM) |
SS |
Sandstorm (Vis < 5/8 SM) (+SS Vis < 516 SM) |
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GR |
Hail |
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+Heavy |
FZ |
Freezing |
GS |
Snow Pellets |
HZ |
Haze (Vis ≤ 6 SM) |
DS |
Dust storm (Vis < 5/8 SM) (+DS Vis < 516 SM) |
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VC In the vicinity |
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UP |
Unknown precipitation (AWOS only) |
VA |
Volcanic Ash (with any visibility) |
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