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Weather Observation and Reporting
Column
Column
Number
Name
1
Type
2
Time
3
Sky and
Ceiling
4
Prevailing
Visibility
5
Weather
and
Obstructions
6
Sea Level
Pressure
7
Temperature
8
9
10
11
12
13
Dew Point
Temperature
Wind
Direction
Wind Speed
Wind
Character
Altimeter
Setting
Remarks
15
17
21
Observers
Initials
Station
Pressure
Total Sky
Estimated total sky coverage by clouds or other
Cover
obstruction reported in tenths.
Explanation
Either SA for hourly observation, or L for local
observation (OBS). OBS are required for aircraft
mishaps, collisions, man overboard.
The time of the OBS always in GMT, must be
recorded within 5 minutes, from 55 to 59 only!
The base of each layer of clouds and the type of
sky cover associated with that layer. Always
drop the last two zeros for the height. 15 BKN
= 1500 feet and broken sky coverage at that
layer.
This is the prevailing visibility reported to the
nearest nautical mile.
Report items such as funnel clouds, hail, sleet,
and fog.
Sea level pressure in millibars, entered in ten,
units, and tenths. Enter 132 for 1013.2.
Enter the dry-bulb temperature from the
psychrometer.
The nearest dew point temperature to the nearest
whole degree Fahrenheit.
The direction from which the TRUE wind is
blowing.
Average wind speed at the time of OBS.
Gusting or squalling if appropriate.
Station pressure reduced to sea level.
Operationally significant information.
Self explanatory.
Pressure in inches.
10-34
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