IRFP-01
Metro Review
7. Once the specific time periods can be discerned, the sequence of
wind, visibility, significant weather, cloud cover and cloud height
follows and is repeated for each time block
a. The only exception is after qualifiers such as PROB40,
TEMPO, and BECMG, some of the components may be
omitted if these are not expected to change
b. Notice that after TEMPO 2022, there is no wind given, and
after PROB40 0407, there is no cloud cover listed
NOTE: When no significant weather (NSW) appears, it only
indicates obstruction to visibility or precipitation previously
noted has ended.
D. METAR/TAF 1.1.1.5.4, 1.1.1.5.1
1. International Differences
a. Pilots and operators who fly to international destinations are
cautioned to be alert to differences between U.S. METAR/TAF
and international METAR/TAF. The following are some key
differences:
(1) Altimeter Setting
(a) The United States reports the altimeter setting in
inches of mercury (e.g., A2992)
(b) Internationally, it will reported in hectoPascals
(millibars) (e.g., Q1016)
(2) Wind
(a) Internationally, wind may be reported in kts (KT),
kilometers per hour (KMH), or meters per second
(MPS). Appropriate units are indicated on both
METAR and TAF
(3) Wind Shear
(a) Low-level wind shear, not associated with convective
activity (e.g., WS015/30045KT, see TAF) will appear in
TAFs in the United States, Canada, and Mexico only
(8-97) Original
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