5-36 Developed for Training Purposes Leerjet 35/36
February 1998
CAE SimuFlite
22020KT. Surface wind. The first three digits (220) are true
direction to the nearest 10°. The next two digits (20) indicate
speed. KT indicates the scale is in knots. TAFs may also use
kilometers-per-hour (KMH) or meters per second (MPS). If
gusts are forecast, a G and a two-digit maximum gust speed
follow the five-digit wind reading (e.g., 22020G10KT). Five
zeros and the appropriate suffix indicate calm winds (e.g.,
00000KT/KMH/MPS) .
3/4SM . Prevailing horizontal visibility. Visibility (3/4SM) is in
statute miles in the U.S. However, most countries use meters
which appears with no suffix (e.g., 1200).
-SHRA. Weather and/or obstruction to visibility. The minus sign
(-) indicates light, a plus sign (+) indicates heavy, and no prefix
indicates moderate. If no significant weather is expected, the
group is omitted. If the weather ceases to be significant after a
change group, the weather code is replaced by the code for no
significant weather (NSW) .
BKN020CB . Cloud coverage/height/type. The first three letters
indicate expected cloud coverage. Cloud height is indicated by
the second set of three digits; these are read in hundreds of
feet (or multiples of 30 meters). When cumulonimbus is fore-
cast, cloud type (CB) follows cloud height.
When an obscured sky is expected and information on vertical
visibility is available, the cloud group is replaced by a different
five-digit code (e.g., VV004). The first two digits are Vs. The
three figures following indicate vertical visibility in units of 100
ft. For indefinite vertical visibility, the two Vs would be followed
by two slash marks (VV//)
.
NOTE: Towers, ATIS and airport advisory service report
wind direction as magnetic.
NOTE: More than one cloud layer may be reported.
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