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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 10:02 HKT 18/Apr/2017

At 10 a.m. at the Hong Kong Observatory the air temperature was 26 degrees Celsius and the relative humidity 82 per cent.
During the past hour the mean UV Index recorded at King's Park was 4. The intensity of UV radiation was moderate.

The air temperatures at other places were:

King's Park 26 degrees;
Wong Chuk Hang 25 degrees;
Ta Kwu Ling 28 degrees;
Lau Fau Shan 26 degrees;
Tai Po 28 degrees;
Sha Tin 27 degrees;
Tuen Mun 27 degrees;
Tseung Kwan O 29 degrees;
Sai Kung 28 degrees;
Cheung Chau 26 degrees;
Chek Lap Kok 27 degrees;
Tsing Yi 26 degrees;
Shek Kong 28 degrees;
Tsuen Wan Ho Koon 25 degrees;
Tsuen Wan Shing Mun Valley 26 degrees;
Hong Kong Park 27 degrees;
Shau Kei Wan 28 degrees;
Kowloon City 27 degrees;
Happy Valley 28 degrees;
Wong Tai Sin 27 degrees;
Stanley 25 degrees;
Kwun Tong 29 degrees;
Sham Shui Po 26 degrees;
Kai Tak Runway Park 28 degrees;
Yuen Long Park 28 degrees;
Tai Mei Tuk 28 degrees.


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


Climatological Information for 18 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 09:00 HKT 18/Apr/2017

N0 WARNING.

GENERAL SITUATION AT 172100 UTC:
A SOUTHERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 180100 UTC:

HONG KONG= SW 4, OCNL 5. ISOL SHOWERS. DOWN TO 4000 M IN MIST PATCHES AT FIRST. SEA UP TO 2 M. TEMP 29-24 C. =
KWANGTUNG= S TO SW 4, OCNL 5. ISOL SHOWERS. DOWN TO 4000 M IN MIST PATCHES AT FIRST. SEA UP TO 2 M. =
TAIWAN STRAIT= SW 4-5. DOWN TO 2000 M IN MIST OR RAIN PATCHES. SEA UP TO 2 M. =
BASHI= SW 4-5, OCNL 6. FINE. SEA UP TO 3 M. =
PRATAS= SW 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
BALINTANG= SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
SCARBOROUGH= S TO SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
PARACEL= S 4, OCNL 5. ISOL SHOWERS. SEA UP TO 2 M. =
TONKIN= SE 4, OCNL 5. DOWN TO 4000 M IN MIST PATCHES. ISOL SHOWERS AND TS LATER. SEA UP TO 2 M. =
DANANG= SE 4, OCNL 5. ISOL SHOWERS. 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 09:30 HKT 18/Apr/2017

Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 18 April 2017

Weather Situation:
A southerly airstream is affecting the coastal waters of Guangdong.

Area forecasts for the next 24 hours

Hong Kong Adjacent Waters:
Southwest force 4, occasionally force 5.
Isolated showers.
Moderate seas.

Nan'ao, Shanwei and South of Hong Kong:
Southwest force 4, occasionally force 5.
Moderate seas.

Shangchuan Dao:
South to southwest force 4, occasionally force 5.
Moderate seas.

Outlook for the next 48 hours
Southwesterly winds of force 4 to 5.

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

Waglan Island Wind west-southwest force 4
  Visibility 11 Kilometres

Shantou Wind west-northwest force 2
  Visibility 6 Kilometres in mist

Dongsha Wind west force 2
  Visibility 10 Kilometres

Huangmaozhou Wind west force 4

Macau Wind west-southwest force 2
  Visibility 12 Kilometres

Xisha Wind south-southwest force 1
  Visibility 30 Kilometres


WEATHER FORECAST FOR LOCAL AVIATION
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Weather Forecast for Local Aviation

Bulletin issued at 09:00 HKT 18/APR/2017
(Next update at 17:30 HKT 18/APR/2017)
I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A SOUTHERLY AIRSTREAM IS AFFECTING THE COAST OF
     GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  220/5-10
       OFFSHORE:  220/15                               26-30
   B.   2000 FT:  270/10                               23
   C.   5000 FT:  270/20                               19
   D.  10000 FT:  290/20                               10
   E.  18000 FT:  250/30                               MS3
   F.  24000 FT:  250/40                               MS14
   G.  30000 FT:  270/40                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      900 - 1800, 3700 - 4700 FT.
   I. WEATHER       : 
      SUNNY PERIODS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT  SCT 8000 FT.
   K. VISIBILITY    : 7 KM.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD OFFSHORE.
   N. SEA STATE     : 1.5 M         SEA TEMPERATURE    : 23 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTH TO SOUTHWESTERLY WINDS.  MAINLY
     CLOUDY AND ISOLATED SHOWERS.  LOCALIZED MIST.=
===================================================================
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.


sigmet
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Significant Weather Information (SIGMET)

The Airport Meteorological Office is responsible for monitoring hazardous weather and phenomena in the atmosphere that may affect the safety of aircraft operations within a designated airspace over the northern part of the South China Sea. Weather forecasters at the Airport Meteorological Office issues SIGMET information when hazardous weather and phenomena in the atmosphere such as thunderstorms, tropical cyclones, turbulence, icing occur or are expected to occur in the airspace.

The latest significant weather information
issued by the Hong Kong Observatory at 05:30 HKT on 18 Apr 17

VHHK SIGMET 1 VALID 172130/180130 VHHH- VHHK HONG KONG FIR EMBD TS FCST S OF N1830 TOP FL380 STNR NC=

Please click here for more about the SIGMET


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: <17 Apr 2017> 

TROPICAL CYCLONE WARNING FOR SHIPPING
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Tropical Cyclone Warning for Shipping

Tropical Cyclone Warning |  Track and Positions of Tropical Cyclones
Current Weather |  Local Weather Forecast |  9-day Weather Forecast
South China Coastal Waters |  Marine Forecast
Severe Weather Information Centre

Bulletin issued at 12:30 HKT 17/Apr/2017


Tropical Cyclone Warning

The tropical depression in the vicinity of the Philippines has weakened into an area of low pressure with central pressure 1004 hectopascals. At 170300 UTC, it was centred within 90 nautical miles of one three point six degrees north (13.6 N) one one seven point six degrees east (117.6 E).

Maximum winds near the centre are estimated to be 20 knots.

No further warnings on this area of low pressure will be issued by the Hong Kong Observatory unless re-intensification takes place.




The Hong Kong Observatory's tropical cyclone warnings for shipping are issued about one and a half hours after the time of observation. They incorporate additional information derived from surface and upper-air data and may therefore be slightly different from the real-time satellite or radar-based positions given in the hourly bulletins for public.

While the forecast positions and track indicate the most likely future path of the tropical cyclone, they may deviate from the actual path taken by the storm.

Tropical Cyclone Track

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 18/Apr/2017
HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     29.4 C
Minimum Air Temperature                     23.7 C
Grass Minimum Temperature                   23.1 C
Relative Humidity                        63 - 92 Percent
Rainfall                                      Trace 
Total rainfall since 1st January            98.3 mm
Against an average of                      257.9 mm

Other Stations                Min                  Max
King's Park                  23.2 C               29.2 C
Wong Chuk Hang               22.2 C               27.6 C
Ta Kwu Ling                  23.0 C               31.8 C
Lau Fau Shan                 22.7 C               30.2 C
Tai Po                       23.0 C               32.2 C
Sha Tin                      22.3 C               31.9 C
Tuen Mun                     23.3 C               30.3 C
Tseung Kwan O                22.8 C               31.3 C
Sai Kung                     22.9 C               28.3 C
Cheung Chau                  22.5 C               29.6 C
Chek Lap Kok                 23.9 C               30.4 C
Tsing Yi                     22.7 C               29.3 C
Shek Kong                    21.5 C               32.0 C
Tsuen Wan Ho Koon            21.7 C               29.9 C
Tsuen Wan Shing Mun Valley   22.0 C               30.0 C
Hong Kong Park               22.7 C               31.4 C
Shau Kei Wan                 22.4 C               30.9 C
Kowloon City                 23.3 C               30.9 C
Happy Valley                 23.8 C               32.4 C
Wong Tai Sin                 23.3 C               31.0 C
Stanley                      23.1 C               27.1 C
Kwun Tong                    23.4 C               31.6 C
Sham Shui Po                 23.4 C               29.5 C
Kai Tak Runway Park          23.3 C               30.8 C
Yuen Long Park               23.1 C               31.5 C
Tai Mei Tuk               23.1 C               31.8 C

Duration of sunshine (King's Park):              8.8 H
The mean UV index recorded at King's Park yesterday was 5,
the UV intensity was Moderate.
The maximum UV index for yesterday was 11.
Sea surface temperature (Waglan Island):        22.7 C 

Yesterday's (17 Apr 2017) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 to
0.14 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                               0.09
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                        0.14

Note
  1. From readings taken at various locations in Hong Kong during the period 1987-2016, the background ambient gamma radiation levels may vary between 0.06 and 0.30 microsievert per hour.
  2. The extent of health effects to a person as a result of exposure to radiation is expressed by a physical quantity called equivalent dose, in unit of sievert. Protective action may be required if there is an increase in the ambient gamma dose rate above background such that the total additional dose is expected to exceed 5000 microsieverts in a relatively short period of time. For example, a dose of 5000 microsieverts may be reached when the ambient gamma dose rate is 1000 microsieverts per hour (several thousand times above background) and lasts for 5 hours.
  3. The readings of ambient gamma radiation level from instrument are expressed in unit of gray, which is numerically equal to the gamma dose expressed in sievert.
Climatological Information for 17 Apr
Last revision date: <18 Apr 2017> 

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