NODC CODES FOR FILE TYPE F156


0052   WIND FORCE(BEAUFORT)
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      0 -- CALM MEAN VELOCITY IN KNOTS <1 IN METERS/SEC 0-0.2 IN KM/H <1 IN M.P.H. <1 /WAVE HT < .25 FT
      1 -- LIGHT AIR  MEAN VELOCITY IN KNOTS 1-3  METERS/SEC 0.3-1.5  KM/H 1-5  M.P.H. 1-3 /WAVE HT= .25 FT
      2 -- LIGHT BREEZE  MEAN VELOCITY IN KNOTS 4-6  METERS/SEC 1.6-3.3  KM/H 6-11  M.P.H. 4-7 /WAVE HT = .5 FT       
      3 -- GENTLE BREEZE  MEAN VELOCITY IN KNOTS 7-10  METERS/SEC 3.4-5.4  KM/H 12-19  M.P.H. 8-12 /WAVE HT = 2 FT
      4 -- MODERATE BREEZE  MEAN VELOCITY IN KNOTS 11-16 METERS/SEC 5.5-7.9  KM/H 20-28  M.P.H. 13-18 /WAVE HT = 4 FT
      5 -- FRESH BREEZE  MEAN VELOCITY IN KNOTS 17-21  METERS/SEC 8.0-10.7  KM/H 29-38  M.P.H. 19-24 /WAVE HT = 6 FT       
      6 -- STRONG BREEZE  MEAN VELOCITY IN KNOTS 22-27  METERS/SEC 10.8-13.8  KM/H 39-49  M.P.H. 25-31 /WAVE HT = 10 FT
      7 -- NEAR GALE  MEAN VELOCITY IN KNOTS 28-33  METERS/SEC 13.9-17.1  KM/H 50-61  M.P.H. 32-38 /WAVE HT = 14 FT
      8 -- GALE  MEAN VELOCITY IN KNOTS 34-40  METERS/SEC 17.2-20.7  KM/H 62-74  M.P.H. 39-46 /WAVE HT = 18 FT
      9 -- STRONG GALE  MEAN VELOCITY IN KNOTS 41-47  METERS/SEC 20.8-24.4  KM/H 75-88  M.P.H. 47-54 /WAVE HT = 23 FT

 0104   WAVE HT (WMO1555)
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        -- NOTE-50 ADDED TO DIRECTION FIELD (CODE 110) TO INDICATE HEIGHTS > 4 1/2 METERS.
      0 -- LESS THAN 1/4 M (1 FT) OR 5 M (16 FT)
      1 -- 1/2 M (1 1/2 FT) OR 5 1/2 M (17 1/2 FT)
      2 -- 1  M (3  FT) OR 6 M (19 FT)
      3 -- 1 1/2 M (5  FT) OR 6 1/2 M (21 FT)
      4 -- 2  M (6 1/2 FT) OR 7 M (22 1/2 FT)
      5 -- 2 1/2 M (8  FT) OR 7 1/2 M (24 FT)
      6 -- 3  M (9 1/2 FT) OR 8 M (25 1/2 FT)
      7 -- 3 1/2 M (11  FT) OR 8 1/2 M (27 FT)
      8 -- 4  M (13  FT) OR 9 M (29 FT)
      9 -- 4 1/2 M (14  FT) OR 9 1/2 M (30 1/2 FT)
      X -- HEIGHT NOT DETERMINED

0109   SEA STATE (WMO3700)
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      0 -- CALM-GLASSY 0 FT (0 METERS)
      1 -- CALM-RIPPLED 0-1/3 FT (0-.1METERS)
      2 -- SMOOTH-WAVELET 1/3-1 2/3 FT (.1-.5 METERS)
      3 -- SLIGHT 1 2/3 - 4 FT(.5-1.25 METERS)
      4 -- MODERATE 4-8 FT(1.25-2.50 METERS)
      5 -- ROUGH 8-13 FT(2.50-4.0 METERS)
      6 -- VERY ROUGH 13-20 FT(4-6 METERS)
      7 -- HIGH 20-30 FT(6-9 METERS)
      8 -- VERY HIGH 30-45 FT(9-14 METERS)
      9 -- PHENOMENAL >45 FT (>14 METERS)

 0378   WAVE PERIOD
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      0 -- 20 OR 21 SECONDS
      1 -- OVER 21 SECONDS
      2 -- 5 SECONDS OR LESS
      3 -- 6 OR 7 SECONDS
      4 -- 8 OR 9 SECONDS
      5 -- 10 OR 11 SECONDS
      6 -- 12 OR 13 SECONDS
      7 -- 14 OR 15 SECONDS
      8 -- 16 OR 17 SECONDS
      9 -- 18 OR 19 SECONDS
      X -- CALM, OR PERIOD NOT DETERMINED

 0618   PRESSURE TENDANCY-WMO200 
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      0 -- INCREASING,THEN DECREASING; ATM PRESSURE THE SAME OR
           HIGHER THAN 3 HOURS AGO.
      1 -- INCREASING THEN STEADY; OR INCREASING THEN INCREASING
           MORE SLOWLY.   
      2 -- INCREASING (STEADILY OR UNSTEADILY)  
      3 -- DECREASING OR STEADY,THEN INCREASING; OR INCREASING
           THEN INCREASING MORE RAPIDLY.
      4 -- STEADY; ATMOSPHERIC PRESSURE THE SAME AS 3 HOURS AGO.
      5 -- DECREASING,THEN INCREASING; ATM PRESSURE THE SAME OR
           LOWER THAN 3 HOURS AGO. 
      6 -- DECREASING THEN STEADY; OR DECREASING THEN DECREASING
           MORE SLOWLY.   
      7 -- DECREASING (STEADILY OR UNSTEADILY)  
      8 -- INCREASING OR STEADY,THEN DECREASING; OR DECREASING
           THEN DECREASING MORE RAPIDLY.