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Automatic Regional Weather Forecast in Hong Kong & Pearl River Delta Region

Local Weather Forecast | Regional Temperature Forecast in HK
9-day Weather Forecast | UV Index Forecast
Weather Information for South China Coastal Waters

Bulletin issued at 13:02 HKT 20/Apr/2018

At 1 p.m. at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 77 per cent.
During the past hour the mean UV Index recorded at King's Park was 5. The intensity of UV radiation was moderate.

The air temperatures at other places were:

King's Park 25 degrees;
Wong Chuk Hang 25 degrees;
Ta Kwu Ling 27 degrees;
Lau Fau Shan 28 degrees;
Tai Po 24 degrees;
Sha Tin 25 degrees;
Tuen Mun 25 degrees;
Tseung Kwan O 24 degrees;
Sai Kung 24 degrees;
Cheung Chau 25 degrees;
Chek Lap Kok 27 degrees;
Tsing Yi 26 degrees;
Shek Kong 27 degrees;
Tsuen Wan Ho Koon 26 degrees;
Tsuen Wan Shing Mun Valley 26 degrees;
Hong Kong Park 24 degrees;
Shau Kei Wan 22 degrees;
Kowloon City 24 degrees;
Happy Valley 25 degrees;
Wong Tai Sin 25 degrees;
Stanley 23 degrees;
Kwun Tong 24 degrees;
Sham Shui Po 25 degrees;
Kai Tak Runway Park 24 degrees;
Yuen Long Park 28 degrees;
Tai Mei Tuk 25 degrees.


Note: The data above is provisional. Only limited data validation has been carried out.


Climatological Information for 20 Apr


Local Weather Forecast
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MARINE FORECAST
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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 11:24 HKT 20/Apr/2018

N0 WARNING.

GENERAL SITUATION AT 192100 UTC:
AN EASTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS

MARINE FORECAST FOR 24 HOURS FROM 200324 UTC:

HONG KONG= E 4-5. ISOL SHOWERS. SEA UP TO 2 M. TEMP 26-23 C. =
KWANGTUNG= E 5-6. ISOL SHOWERS. SEA 2-3 M. =
TAIWAN STRAIT= NE 5-6. CLD. SEA 2-3 M. SWELL NE 2 M. =
BASHI= E TO NE 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL NE 2 M. =
PRATAS= E 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL NE UP TO 2 M. =
BALINTANG= E TO NE 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL NE UP TO 2 M. =
SCARBOROUGH= NE 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL NE UP TO 2 M. =
PARACEL= E TO SE 4-5, OCNL 6. ISOL SHOWERS. SEA UP TO 3 M. =
TONKIN= E TO SE 4-5. DOWN TO 2000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= E TO SE 4-5. DOWN TO 2000 M IN MIST OR RAIN PATCHES. SEA UP TO 2 M. =
NNNN
Abbreviations:
KT, VRB, SLW, FRQ - knot, variable, slow, frequent STNR, QSTNR, C - stationary, quasi-stationary, degrees celsius WKN, INTSF, INTST, NC - weaken, intensify, intensity, no change LGT, ISOL, SCT, OCNL - light, isolated, scattered, occasional CLD, DZ, TS - cloudy, drizzle, thunderstorm

The date and time are specified by a 6-digit number DDHHMM. DD stands for the day of month, HH represents the hour while MM indicates the minute in UTC.



SOUTH CHINA COASTAL WATERS
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South China Coastal Waters

Current Weather | Local Weather Forecast | Regional Temperature Forecast in HK
9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

Bulletin issued at 12:30 HKT 20/Apr/2018

Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 20 April 2018

Warnings:
Strong winds in Nan'ao, Shanwei, south of Hong Kong and Shangchuan Dao.

Weather Situation:
An easterly airstream is affecting the coastal waters of Guangdong.

Area forecasts for the next 24 hours

Hong Kong Adjacent Waters:
East force 4 to 5.
Isolated showers.
Moderate seas.

Nan'ao:
East to northeast force 5 to 6.
Moderate to rough seas.

Shanwei and South of Hong Kong:
East force 5, occasionally force 6.
Moderate to rough seas.

Shangchuan Dao:
East to southeast force 5, occasionally force 6.
Moderate to rough seas.

Outlook for the next 48 hours
East to southeasterly winds of force 5 to 6, becoming south to southeasterly winds of force 5 to 6 later.

Latest reports from south China coastal weather stations
--------------------------------------------------------

Waglan Island Wind east-northeast force 5
  Visibility 16 Kilometres

Shantou Wind east force 2
  Visibility 23 Kilometres

Huangmaozhou Wind east force 5

Macau Wind east force 2
  Visibility 8 Kilometres

Xisha Wind east-southeast force 2
  Visibility 26 Kilometres


WEATHER FORECAST FOR LOCAL AVIATION
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Weather Forecast for Local Aviation

Bulletin issued at 12:30 HKT 20/APR/2018
(Next update at 17:30 HKT 20/APR/2018)
I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE COASTAL
     AREAS OF F GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1300 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/10-15
       OFFSHORE:  090/15-20                            26-22
   B.   2000 FT:  140/15-20 OCNL 25                    18
   C.   5000 FT:  150/10                               15
   D.  10000 FT:  220/20                               9
   E.  18000 FT:  220/30                               MS7
   F.  24000 FT:  260/30                               MS18
   G.  30000 FT:  240/35                               MS33
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH ISOLATED SHOWERS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT SCT 3000 FT
   K. VISIBILITY    : 9 KM. TEMPO 4000 M IN SHOWERS.
   L. 0 DEG. C LEVEL: 14500 FT      10 DEG. C LEVEL(S) : 9200 FT
   M. TURBULENCE    : MOD TO SEV NEAR HILLS. MOD OFFSHORE.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 23 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY WINDS, FRESH OFFSHORE.  MAINLY
     CLOUDY WITH A FEW SHOWERS.=
===================================================================
Note: The forecast could be updated before the next issue time 
whenever there is newly expected occurrence or non-occurrence 
of significant weather as described below which may be hazardous 
to aircraft within 100-km radius of Hong Kong:

(a) Change of the tropical cyclone category
(b) Strong, Gale, Storm, and Hurricane force winds
(c) Thunderstorm/CBs
(d) Severe gusts
(e) Severe turbulence
(f) Significant low stratus
(g) Fog or thick haze/sandstorm/duststorm 
    causing significant reduction of visibility
(h) Volcanic ash
(i) Radioactive cloud
===================================================================
Aviation Weather Observation and Forecast Information for Hong Kong International Airport
To know more about clouds, please see Commonly observed clouds in Hong Kong.


Tropical Cyclone Warning
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Tropical Cyclone Warning

There is no tropical cyclone warning signal.

For other tropical cyclone related information, please visit the World Meteorological Organization Web Site - Severe Weather Information Centre.


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Last revision date: <06 Apr 2018> 

TROPICAL CYCLONE WARNING FOR SHIPPING
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Tropical Cyclone Warning for Shipping

There is no tropical cyclone warning for shipping*.




*Tropical cyclone warnings for shipping are issued by the Hong Kong Observatory for tropical cyclones located within the area bounded by 105E and 125E , 10N and 30N.




For other tropical cyclone related information, please visit the World Meteorological Organization Web Site - Severe Weather Information Centre.


YESTERDAY'S WEATHER AND RADIATION LEVEL Skip to main content
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Yesterday's Weather and Radiation Level

Bulletin issued at 00:15 HKT 20/Apr/2018
HKO Readings & Radiation Level

Yesterday's Weather and Radiation Level:
------------------------------------------------------

Hong Kong Observatory
Maximum Air Temperature                     26.3 C
Minimum Air Temperature                     21.4 C
Grass Minimum Temperature                   19.9 C
Relative Humidity                        65 - 84 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January           108.9 mm
Against an average of                      273.5 mm

Other Stations                Min                  Max
King's Park                  20.4 C               25.8 C
Wong Chuk Hang               19.5 C               26.5 C
Ta Kwu Ling                  19.3 C               27.9 C
Lau Fau Shan                 18.7 C               28.4 C
Tai Po                       19.4 C               24.4 C
Sha Tin                      19.4 C               26.0 C
Tuen Mun                     19.9 C               26.7 C
Tseung Kwan O                18.4 C               24.8 C
Sai Kung                     19.4 C               24.2 C
Cheung Chau                  20.3 C               26.0 C
Chek Lap Kok                 21.2 C               28.4 C
Tsing Yi                     19.7 C               27.7 C
Shek Kong                    18.5 C               28.6 C
Tsuen Wan Ho Koon            17.7 C               27.0 C
Tsuen Wan Shing Mun Valley   18.7 C               27.2 C
Hong Kong Park               20.0 C               25.9 C
Shau Kei Wan                 20.1 C               24.1 C
Kowloon City                 20.0 C               26.4 C
Happy Valley                 20.1 C               27.3 C
Wong Tai Sin                 19.8 C               26.0 C
Stanley                      21.2 C               24.8 C
Kwun Tong                    20.2 C               25.2 C
Sham Shui Po                 20.3 C               26.6 C
Kai Tak Runway Park          21.3 C               24.3 C
Yuen Long Park               18.3 C               28.4 C
Tai Mei Tuk               19.8 C               27.0 C

Duration of sunshine (King's Park):              8.4 H
The mean UV index recorded at King's Park yesterday was 4,
the UV intensity was Moderate.
The maximum UV index for yesterday was 9.
Sea surface temperature (Waglan Island):        22.5 C 

Yesterday's (19 Apr 2018) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 to
0.15 microsievert per hour.  These are within the normal
range of fluctuation of the background radiation level in
Hong Kong (see Note). The average dose rates measured at the
radiation monitoring stations over various parts of the
territory were as follows :

Station                     Yesterday's average
                            (microsievert/hour)
Ping Chau                           0.08
Tap Mun                             0.09
Kat O                               0.10
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.12
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.15

Note
  1. From readings taken at various locations in Hong Kong in the past, the hourly mean ambient gamma radiation dose rate may vary between 0.06 and 0.3 microsievert per hour. (1 microsievert = 0.000001 sievert = 0.001 millisievert)
  2. Temporal variations are generally caused by changes in meteorological conditions such as rainfall, wind and barometric pressure.
  3. Spatial variations are generally caused by differences in the radioactive content of local rock and soil.
  4. The data displayed is provisional. Only limited data validation has been carried out.
Climatological Information for 19 Apr
Last revision date: <20 Apr 2018> 

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