674
Table IX.
In 2 hours.
In 3 hours.
In 4 hours.
Code Figure.
Barometer steady-Has not risen
or fallen more than
0.3 mb. (.01 in)
0.5 mb.
(.01 in)
0.7 mb. (.02 in)
Barometer
rising
slowly-Has
0.7-1.0 mb.
1.0-1.5 mb.
1.3-2.0 mb.
1
risen
(.02-.03 in)
(.03-.05 in)
(.01-.06 in)
Barometer rising-Has risen
1.4-2.4 mb. (.05-.07 in)
2.0-3.5 mb. (.06-.10 in)
2.8-4.8 mb.
(.08-.14 in)
Barometer rising quickly-Has
risen
2.6-4.0 mb. (.08-.12 in)
4.0-6.0 mb. (.12-.18 in)
5.2-8.0 mb.
3
(.15-.24 in)
Barometer rising very rapidly-
Has risen
over 4.0 mb.
over 6.0 mb.
over 8.0 mb.
(,, .12 in) |
(„,
.18 in) .18 in)
|
(
(,, .24 in)
Barometer falling slowly-Has 0.7-1.0 mb.
1.0-1.5 mb.
1.3-2.0 mb.
5
fallen
(.02-.03 in)
(.03-.05 in)
(.04-.06 in)
Barometer falling - Has fallen
1.4-2.4 mb.
2.0-3.5 mb.
2.8-4.8 mb.
(.05-.07 in)
(.06-.10 in)
(.08-.14 in)
Barometer falling quickly-Has
fallen
2.6-4.0 mb. (08-12 in)
4.0-6.0 mb.
5.2-8.0 mb.
(12-18 in)
(.15-.24 in)
Barometer falling very rapidly-
Has fallen
over 4.0 mb.
.12 in) | („,
over 6.0 mb.
.18 in) |
over 8.0 mb.
(,,
.24 in)
(The change in 3 hours should be given if possible).
Table XII.
Code Figure.
Dense fog Thick fog
Fog
Moderate fog
Objects not visible at 50 yards Objects not visible at 1 cable Objects not visible at Objects not visible at
0
1
2 cables
mile (nautical)
3
►
Objects not visible at Objects not visible at Objects not visible at Objects not visible at 10 miles (nautical) Objects not visible at 30 miles (nautical)
1 mile (nautical) 2 miles (nautical) 5 miles (nautical)
4
5
6
7
8
Mist or haze, or very
poor visibility
Poor visibility
Moderate visibility
Good visibility
Very Good visibility Excellent visibility Objects visible more than 30 miles (nautical)
•
(Further information concerning the code may be found in the Marine Observer 1934, and subsequent issues, obtainable from the Meteorological Office, London).
>>
9
for January,
C. W. JEFFRIES,
Director.
27th July, 1934.