EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG, MAY 1999
EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG,
MAY 1999
| Date MAY |
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 | 1008.2 | 25.0 | 23.1 | 21.3 | 19.8 | 81 | 91 | 5.7 |
| 2 | 1006.2 | 24.3 | 23.0 | 22.1 | 20.5 | 86 | 90 | 9.6 |
| 3 | 1009.3 | 28.6 | 25.5 | 23.2 | 21.2 | 77 | 54 | - |
| 4 | 1009.1 | 29.7 | 26.6 | 24.3 | 22.6 | 79 | 43 | - |
| 5 | 1011.7 | 26.2 | 22.7 | 21.3 | 20.3 | 87 | 98 | 29.0 |
| 6 | 1012.3 | 21.6 | 19.7 | 17.0 | 16.4 | 82 | 94 | 9.1 |
| 7 | 1011.3 | 24.3 | 21.5 | 18.6 | 16.2 | 72 | 87 | 1.0 |
| 8 | 1010.4 | 22.6 | 20.4 | 18.6 | 17.7 | 85 | 95 | 10.8 |
| 9 | 1009.9 | 20.5 | 19.7 | 18.6 | 18.3 | 92 | 87 | 24.0 |
| 10 | 1011.5 | 27.5 | 23.2 | 20.0 | 18.0 | 74 | 53 | - |
| 11 | 1012.4 | 28.3 | 24.7 | 21.6 | 20.4 | 77 | 57 | - |
| 12 | 1013.2 | 27.0 | 24.7 | 23.7 | 21.7 | 84 | 87 | 0.5 |
| 13 | 1012.3 | 27.8 | 25.2 | 23.5 | 21.7 | 81 | 80 | - |
| 14 | 1011.1 | 28.7 | 25.7 | 24.2 | 22.2 | 81 | 86 | Trace |
| 15 | 1009.9 | 28.0 | 25.8 | 24.8 | 23.3 | 86 | 86 | Trace |
| 16 | 1007.7 | 29.9 | 27.3 | 25.7 | 23.5 | 80 | 85 | Trace |
| 17 | 1006.3 | 31.5 | 28.5 | 27.1 | 24.1 | 77 | 80 | Trace |
| 18 | 1006.5 | 30.5 | 27.6 | 24.9 | 24.1 | 81 | 87 | 2.1 |
| 19 | 1010.8 | 26.4 | 24.5 | 23.6 | 22.7 | 90 | 95 | 46.9 |
| 20 | 1014.1 | 26.3 | 24.8 | 24.1 | 20.8 | 78 | 88 | Trace |
| 21 | 1013.2 | 25.7 | 24.8 | 24.0 | 21.5 | 82 | 88 | 2.9 |
| 22 | 1010.6 | 28.1 | 25.9 | 24.3 | 23.8 | 88 | 84 | 0.5 |
| 23 | 1008.5 | 30.2 | 27.6 | 25.9 | 24.2 | 82 | 79 | Trace |
| 24 | 1006.9 | 30.8 | 28.4 | 27.1 | 24.3 | 79 | 82 | Trace |
| 25 | 1006.2 | 30.5 | 28.3 | 25.8 | 24.3 | 79 | 88 | 3.7 |
| 26 | 1007.3 | 31.2 | 28.5 | 25.2 | 24.3 | 78 | 87 | 1.3 |
| 27 | 1009.6 | 25.2 | 24.2 | 21.9 | 22.5 | 90 | 96 | 28.1 |
| 28 | 1009.9 | 23.8 | 22.9 | 21.9 | 19.9 | 83 | 93 | 1.9 |
| 29 | 1008.2 | 24.9 | 23.7 | 21.8 | 19.5 | 78 | 93 | 0.7 |
| 30 | 1007.0 | 29.1 | 25.8 | 24.0 | 22.6 | 83 | 89 | Trace |
| 31 | 1007.5 | 29.8 | 26.9 | 24.8 | 23.8 | 83 | 61 | Trace |
| Mean/Total | 1009.7 | 27.2 | 24.9 | 23.1 | 21.5 | 82 | 83 | 177.8 |
| Normal | 1009.1 | 28.7 | 25.9 | 23.9 | 22.6 | 83 | 74 | 316.7 |
| Station | Hong Kong Observatory | |||||||
| Date MAY |
Total Bright Sunshine (hours) |
Daily Global Solar Radiation (MJ/m2) |
Total Evaporation (mm) |
Prevailing Wind Direction (degrees) |
Mean Wind Speed (km/h) |
|---|---|---|---|---|---|
| 1 | 0.1 | 9.38 | 1.4 | 010 | 62.2 |
| 2 | - | 4.49 | 1.3 | 040 | 62.6 |
| 3 | 6.6 | 21.26 | 4.3 | 250 | 18.7 |
| 4 | 9.0 | 21.81 | 4.9 | 280 | 19.7 |
| 5 | - | 2.10 | 3.4 | 010 | 18.8 |
| 6 | - | 4.28 | 1.4 | 060 | 32.3 |
| 7 | 1.2 | 13.45 | 2.4 | 060 | 26.5 |
| 8 | - | 6.45 | 0.7 | 050 | 39.5 |
| 9 | - | 3.52 | 1.2 | 360 | 22.5 |
| 10 | 8.7 | 22.31 | 4.2 | 010 | 13.2 |
| 11 | 9.2 | 20.02 | 3.8 | 340 | 8.5 |
| 12 | 2.2 | 15.50 | 3.1 | 070 | 16.0 |
| 13 | 5.6 | 17.72 | 3.2 | 090 | 11.3 |
| 14 | 6.0 | 20.04 | 4.9 | 090 | 11.9 |
| 15 | 2.5 | 13.60 | 2.3 | 100 | 17.8 |
| 16 | 4.7 | 14.27 | 4.4 | 180 | 19.0 |
| 17 | 10.0 | 22.21 | 4.3 | 220 | 28.4 |
| 18 | 6.8 | 17.95 | 4.5 | 230 | 26.0 |
| 19 | - | 4.72 | 1.5 | 010 | 19.4 |
| 20 | 0.4 | 11.26 | 3.0 | 070 | 40.5 |
| 21 | - | 7.86 | 1.6 | 070 | 34.1 |
| 22 | 3.5 | 17.09 | 3.4 | 070 | 20.0 |
| 23 | 9.5 | 17.13 | 4.4 | 180 | 11.0 |
| 24 | 4.2 | 18.17 | 4.8 | 230 | 23.8 |
| 25 | 2.5 | 12.12 | 3.9 | 220 | 27.6 |
| 26 | 3.9 | 17.60 | 4.9 | 220 | 34.7 |
| 27 | - | 4.54 | 2.1 | 010 | 13.1 |
| 28 | - | 6.41 | 0.2 | 060 | 23.8 |
| 29 | - | 6.97 | 3.3 | 070 | 28.5 |
| 30 | 2.8 | 16.90 | 3.7 | 060 | 29.1 |
| 31 | 10.4 | 23.00 | 5.1 | 080 | 16.5 |
| Mean/Total | 109.8 | 13.36 | 97.6 | 070 | 25.1 |
| Normal | 153.8 | 16.12 | 137.7 | 090 | 19.2 |
| Station | King's Park | Waglan Island^ | |||
The minimum pressure recorded at the Hong Kong Observatory was 1004.1 hectopascals at 1636 HKT on 17 May.
The maximum air temperature recorded at the Hong Kong Observatory was 31.5 degrees C at 1455 HKT on 17 May.
The minimum air temperature recorded at the Hong Kong Observatory was 17.0 degrees C at 1804 HKT on 6 May.
The maximum gust peak speed recorded at Waglan Island was 130 kilometres per hour from 030 degrees at 1204 HKT on 2 May.
The maximum instantaneous rate of rainfall recorded at King's Park was 136 millimetres per hour at 0450 HKT on 19 May.
^ 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.