WMO Station Model Abbreviations, Component Decoding Part 1

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Created 8/22/2026

Last updated 6:45 PM on 8/23/26
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10 Terms

1
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N

total amount of cloud cover, measured in eighths

2
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dd

direction from which the wind is blowing (e.g 315 deg NW)

3
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ff

wind speed in knots (kt)

4
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VV

visibility in miles

5
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ww

present weather (e.g rain, light snow)

6
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ppp

sea-level barometric pressure, coded

7
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TT

current air temperature, in degrees Fahrenheit

8
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TdTd

dew point temperature, in degrees Fahrenheit

9
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±pp

pressure change in past 3 hrs, in tenths of millibars (e.g “rise of 2.8 hPa”)

10
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a

pressure tendency (what the pressure is doing, e.g “rising steadily”)