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Explanation of Forecast Elements

Terminal Forecast Guidance
Hour - UTC Forecast time in UTC
CIG<5KFT Ceiling height in 100s of feet, if below 5,000 ft
  Values range from 0 to 050
VIS Visibility in Miles
  Values range from 0 to 7 miles
SKY Sky cover
  CL = Clear
FW = Few Clouds
SC = Scattered Clouds
BK = Broken Clouds
OV = Overcast Clouds
PCCT Probable Convective Cloud Top (100s feet)
PTSTM Probability of Thunderstorms (%)
WX Weather from the TAF
WX2 Secondary Weather from GFE database.
POP Probability of Precipitation. Values given as percentage.
FLTCAT Forecast Flight Category.
  L = LIFR
I = IFR
M = MVFR
V = VFR
CONF Forecast confidence based on model output
  H = High confidence
M = Medium confidence
L = Low confidence
FLTCAT2 Secondary Flight Category b
TEMP Temperature (F)
DEWP Dewpoint (F)
WINDDIR Wind Direction (deg)
WNDSPD Wind Speed (kts.)
WNDGST Wind Gusts (kts.)
RY-Pair Favored Runway/crosswind (kts.)/tailwind (kts)
PLLWS Probability of Low Level Wind Shear
PICE050 Probability of icing at 5,000 feet
PICE030 Probability of icing at 3,000 feet
PICE010 Probability of icing at 1,000 feet

 

V-Route Forecast Guidance

Hour-UTC Forecast time in UTC
PICE180 Icing risk at 18,000 feet (None, Low, Medium, High)
PICE150 Icing risk at 15,000 feet (None, Low, Medium, High)
PICE130 Icing risk at 13,000 feet (None, Low, Medium, High)
PICE110 Icing risk at 11,000 feet (None, Low, Medium, High)
PICE090 Icing risk at 9,000 feet (None, Low, Medium, High)
PICE070 Icing risk at 7,000 feet (None, Low, Medium, High)
PICE050 Icing risk at 5,000 feet (None, Low, Medium, High)
PICE030 Icing risk at 3,000 feet (None, Low, Medium, High)
PICE010 Icing risk at 1,000 feet (None ,Low, Medium, High)
FL180 Winds at 18,000 feet (dir./kts.)
FL150 Winds at 15,000 feet (dir./kts.)
FL130 Winds at 13,000 feet (dir./kts.)
FL110 Winds at 11,000 feet (dir./kts.)
FL090 Winds at 9,000 feet (dir./kts.)
FL070 Winds at 7,000 feet (dir./kts.)
FL050 Winds at 5,000 feet (dir./kts.)
FL030 Winds at 3,000 feet (dir./kts.)
FL010 Winds at 1,000 feet (dir./kts.)
PCCT Probable Convective Cloud Top (100s feet)
PTSTM Probability of Thunderstorms (%)

 

J-Route Forecast Guidance

Hour-UTC Forecast time in UTC
PTURB420 Risk of turbulence at 42,000 feet (None, Low, Medium, High), based on Richardson Number
PTURB390 Risk of turbulence at 39,000 feet (None, Low, Medium, High), based on Richardson Number
PTURB360 Risk of turbulence at 36,000 feet (None, Low, Medium, High), based on Richardson Number
PTURB330 Risk of turbulence at 33,000 feet (None, Low, Medium, High), based on Richardson Number
PTURB300 Risk of turbulence at 30,000 feet (None, Low, Medium, High), based on Richardson Number
PTURB270 Risk of turbulence at 27,000 feet (None, Low, Medium, High), based on Richardson Number
PTURB240 Risk of turbulence at 24,000 feet (None, Low, Medium, High), based on Richardson Number
PTURB210 Risk of turbulence at 21,000 feet (None, Low, Medium, High), based on Richardson Number
PTURB180 Risk of turbulence at 18,000 feet (None, Low, Medium, High), based on Richardson Number
FL420 Winds at 42,000 feet (dir./kts.)
FL390 Winds at 39,000 feet (dir./kts.)
FL360 Winds at 36,000 feet (dir./kts.)
FL330 Winds at 33,000 feet (dir./kts.)
FL300 Winds at 30,000 feet (dir./kts.)
FL270 Winds at 27,000 feet (dir./kts.)
FL240 Winds at 24,000 feet (dir./kts.)
FL210 Winds at 21,000 feet (dir./kts.)
FL180 Winds at 18,000 feet (dir./kts.)
PCCT Probable Convective Cloud Top (100s feet)
PTSTM Probability of Thunderstorms (%)



National Weather Service
Eastern Region Headquarters
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Bohemia, NY 11716
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Page last modified: February 10, 2009

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