EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG, APRIL 1999
EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG,
APRIL 1999
| Date APRIL |
Mean Pressure (hPa) |
Air Temperature | Mean Dew Point Temperature (deg. C) |
Mean Relative Humidity (%) |
Mean Amount of Cloud (%) |
Total Rainfall (mm) | ||
|---|---|---|---|---|---|---|---|---|
| Maximum (deg. C) |
Mean (deg. C) |
Minimum (deg. C) | ||||||
| 1 | 1013.5 | 26.1 | 22.8 | 20.1 | 18.5 | 77 | 69 | 0.1 |
| 2 | 1013.5 | 28.5 | 25.0 | 22.6 | 20.2 | 75 | 80 | 0.2 |
| 3 | 1016.4 | 23.9 | 20.6 | 19.5 | 16.6 | 78 | 92 | 0.1 |
| 4 | 1016.2 | 22.8 | 20.8 | 19.9 | 16.6 | 77 | 98 | Trace |
| 5 | 1015.2 | 24.5 | 21.8 | 19.6 | 15.2 | 67 | 56 | - |
| 6 | 1014.2 | 26.6 | 23.2 | 20.1 | 13.0 | 55 | 2 | - |
| 7 | 1014.9 | 26.2 | 23.5 | 21.1 | 14.9 | 60 | 26 | - |
| 8 | 1014.3 | 25.5 | 23.2 | 21.3 | 18.7 | 76 | 77 | Trace |
| 9 | 1013.4 | 27.1 | 24.5 | 22.7 | 21.4 | 83 | 79 | Trace |
| 10 | 1011.9 | 30.0 | 25.9 | 23.6 | 21.2 | 76 | 64 | Trace |
| 11 | 1009.2 | 25.4 | 23.6 | 22.3 | 20.3 | 83 | 90 | 2.5 |
| 12 | 1006.5 | 26.8 | 24.5 | 22.3 | 22.8 | 91 | 84 | 81.5 |
| 13 | 1010.6 | 27.8 | 24.9 | 22.3 | 21.2 | 80 | 60 | Trace |
| 14 | 1014.6 | 24.0 | 22.3 | 21.1 | 17.1 | 72 | 84 | Trace |
| 15 | 1014.3 | 24.5 | 22.9 | 21.1 | 18.9 | 78 | 82 | Trace |
| 16 | 1011.1 | 26.9 | 25.1 | 23.5 | 22.2 | 84 | 83 | - |
| 17 | 1007.3 | 29.3 | 27.1 | 25.4 | 23.9 | 83 | 88 | Trace |
| 18 | 1007.2 | 29.4 | 27.7 | 26.7 | 24.2 | 81 | 77 | Trace |
| 19 | 1008.7 | 27.0 | 25.2 | 23.5 | 23.1 | 88 | 87 | 8.4 |
| 20 | 1012.0 | 25.3 | 24.2 | 22.5 | 22.3 | 90 | 97 | 0.7 |
| 21 | 1012.0 | 26.7 | 24.0 | 22.3 | 21.6 | 87 | 85 | 16.8 |
| 22 | 1008.8 | 29.8 | 26.0 | 22.5 | 22.5 | 82 | 66 | 0.4 |
| 23 | 1006.6 | 31.1 | 27.3 | 25.1 | 23.6 | 81 | 59 | Trace |
| 24 | 1006.8 | 30.3 | 27.5 | 26.2 | 23.7 | 80 | 76 | Trace |
| 25 | 1006.5 | 30.0 | 27.6 | 26.2 | 24.3 | 83 | 61 | Trace |
| 26 | 1008.4 | 30.4 | 27.1 | 25.1 | 24.3 | 85 | 65 | 5.4 |
| 27 | 1011.5 | 26.5 | 24.8 | 23.7 | 20.5 | 77 | 89 | Trace |
| 28 | 1012.1 | 27.0 | 23.9 | 22.5 | 17.8 | 69 | 85 | - |
| 29 | 1011.7 | 23.4 | 20.6 | 19.4 | 18.4 | 87 | 97 | 58.9 |
| 30 | 1010.8 | 22.9 | 20.6 | 18.3 | 17.2 | 81 | 96 | 1.9 |
| Mean/Total | 1011.3 | 26.9 | 24.3 | 22.4 | 20.2 | 79 | 75 | 176.9 |
| Normal | 1013.1 | 24.9 | 22.2 | 20.2 | 19.0 | 83 | 78 | 161.5 |
| Station | Hong Kong Observatory | |||||||
| Date APRIL |
Total Bright Sunshine (hours) |
Daily Global Solar Radiation (MJ/m2) |
Total Evaporation (mm) |
Prevailing Wind Direction (degrees) |
Mean Wind Speed (km/h) |
|---|---|---|---|---|---|
| 1 | 6.6 | 19.05 | 4.8 | 070 | 27.5 |
| 2 | 5.1 | 15.34 | 3.3 | 040 | 15.0 |
| 3 | 2.1 | 10.24 | 4.1 | 080 | 45.3 |
| 4 | 0.1 | 6.52 | 2.6 | 070 | 24.3 |
| 5 | 7.2 | 17.31 | 4.5 | 010 | 11.6 |
| 6 | 10.6 | 22.51 | 6.4 | 080 | 22.6 |
| 7 | 7.4 | 19.06 | 4.8 | 080 | 38.0 |
| 8 | 3.2 | 13.15 | 3.5 | 070 | 30.5 |
| 9 | 2.9 | 11.19 | 2.4 | 060 | 18.1 |
| 10 | 8.3 | 21.00 | 6.0 | 090 | 16.4 |
| 11 | 1.0 | 8.16 | 3.1 | 090 | 29.4 |
| 12 | 1.2 | 9.84 | 1.7 | 130 | 10.7 |
| 13 | 9.8 | 21.89 | 5.7 | 080 | 36.0 |
| 14 | 0.4 | 11.25 | 3.7 | 080 | 47.4 |
| 15 | 4.2 | 14.65 | 4.1 | 070 | 35.4 |
| 16 | 5.7 | 15.10 | 3.3 | 060 | 14.9 |
| 17 | 5.5 | 12.90 | 3.5 | 200 | 22.2 |
| 18 | 4.5 | 13.30 | 4.5 | 220 | 21.6 |
| 19 | 0.8 | 5.24 | 1.6 | 230 | 14.5 |
| 20 | 0.7 | 8.62 | 2.1 | 070 | 28.2 |
| 21 | 7.5 | 19.29 | 3.8 | 070 | 24.3 |
| 22 | 7.8 | 19.01 | 4.0 | 030 | 9.0 |
| 23 | 9.3 | 18.09 | 4.3 | 140 | 12.6 |
| 24 | 3.7 | 11.24 | 3.0 | 130 | 25.2 |
| 25 | 10.8 | 20.45 | 4.5 | 110 | 18.1 |
| 26 | 10.4 | 23.04 | 5.9 | 090 | 23.8 |
| 27 | 0.7 | 11.45 | 4.1 | 070 | 39.7 |
| 28 | 2.2 | 13.85 | 5.2 | 010 | 36.8 |
| 29 | - | 3.80 | 3.6 | 050 | 60.1 |
| 30 | - | 4.26 | 0.8 | 050 | 57.8 |
| Mean/Total | 139.7 | 14.03 | 114.9 | 070 | 27.2 |
| Normal | 108.9 | 13.14 | 106.9 | 080 | 19.7 |
| Station | King's Park | Waglan Island^ | |||
The minimum pressure recorded at the Hong Kong Observatory was 1004.0 hectopascals at 1617 HKT on 12 April.
The maximum air temperature recorded at the Hong Kong Observatory was 31.1 degrees C at 1356 HKT on 23 April.
The minimum air temperature recorded at the Hong Kong Observatory was 18.3 degrees C at 0625 HKT on 30 April.
The maximum gust peak speed recorded at Waglan Island was 90 kilometres per hour from 060 degrees at 2351 HKT on 29 April.
The maximum instantaneous rate of rainfall recorded at King's Park was 131 millimetres per hour at 2214 HKT on 11 April.
^ In case the data are not available from Waglan Island, observations of Cheung Chau or other nearby weather stations will be incorporated in computing the Prevailing Wind Direction and Mean Wind Speed.