PFM Code and Definitions


Wind Speed Table

Wind Char - 12HR Max Sustained Wind Speed
LT Light
< 8 mph
GN Gentle 8 - 14 mph
BZ Breezy 15 - 22 mph
WY Windy 23 - 30 mph
VW Very Windy 31 - 39 mph
SD Strong/Damaging = 40 mph


Clouds


Sky Cover
CL Clear/Sunny 0%= 6%
FW Mostly Clear/Mostly Sunny > 6% and = 31%
SC Partly Cloudy/Partly Sunny >31% and = 69%
BK Mostly Cloudy >69% and = 94%
OV Cloudy >94% and = 100%


Precipitation Type


RAIN Rain
RAIN SHWRS Rain Showers
SPRINKLES Sprinkles
TSTMS Thunderstorms
DRIZZLE Drizzle
SNOW Snow
SNOWSHWRS Snow Showers
FLURRIES Snow Flurries
SLEET Ice Pellets
FRZNG RAIN Freezing Rain
FRZNG DRZL Freezing Drizzle


Probablility of
Precipitation Codes


Stratiform or Convective (Thunderstorm)
S
Slight Chance (= 20%)
C Chance (30%-50%)
L Likely (60%-70%)
O Occasional/Periods of (80%-100%)
D None (80%-100%)

Convective (Thunderstorm) Only
IS Isolated (= 20%)
SC Scattered (30%-50%)
NM Numerous (60%-70%)
EX None (80%-100%)


OBVIS

F Fog
PF Patchy Fog
F+ Dense Fog
PF+ Patchy Dense Fog
H Haze
BS Blowing Snow
K Smoke
BD Blowing Dust
VA Volcanic Ash


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