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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 22:02 HKT 25/Apr/2017

At 10 p.m. at the Hong Kong Observatory the air temperature was 23 degrees Celsius and the relative humidity 97 per cent.

The air temperatures at other places were:

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

Between 8:45 and 9:45 p.m., the rainfall recorded in various regions were:

Yuen Long 0 to 1 mm.


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


Climatological Information for 25 Apr


Local Weather Forecast
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Local Weather Forecast

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

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

Bulletin updated at 21:45 HKT 25/Apr/2017

Here is the latest weather bulletin issued by the Hong Kong Observatory.

The rain area associated with an upper-air disturbance is affecting the coast of Guangdong. Locally, the thundery showers in the evening brought more than 10 millimetres of rainfall to many places.

At 8 p.m., the tropical depression over the seas east of the Philippines was centred about 440 kilometres northwest of Yap. It is forecast to move west-northwest at about 16 kilometres per hour across the western North Pacific.

Weather forecast for tonight and tomorrow

Mainly cloudy with a few showers and isolated thunderstorms. Misty in the morning and at night. Bright periods during the day. Temperatures will range between 22 and 27 degrees. Moderate east to southeasterly winds, occasionally fresh at first.

Outlook : Still showery on Thursday. The weather will improve in the following couple of days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 26/04/2017; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)



MARINE FORECAST
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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 21:00 HKT 25/Apr/2017

N0 WARNING.

GENERAL SITUATION AT 250900 UTC:
A SOUTHEASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 251300 UTC:

HONG KONG= SE 5-6, BEC SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. TEMP 22-27 C. =
KWANGTUNG= E TO SE 5-6, BEC SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. =
TAIWAN STRAIT= SE 4-5, NE 6-7 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M, 3-4 M LATER. =
BASHI= SE 5-6, SW 5 LATER. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL E UP TO 2 M. =
PRATAS= E TO SE 5-6, SW 4-5 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. =
BALINTANG= SE 5-6, SW 4-5 LATER. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL E UP TO 2 M. =
SCARBOROUGH= SE 4-5, SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
PARACEL= S 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
TONKIN= S 4-5, NE 5 LATER. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA UP TO 2 M. =
DANANG= S 4-5. ISOL SHOWERS AND TS. 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 22:00 HKT 25/Apr/2017

Weather information for south China coastal waters issued by the Hong Kong Observatory at 10:00 p.m. on 25 April 2017

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

Weather Situation:
Unsettled weather is affecting the coastal waters of Guangdong.

Area forecasts for the next 24 hours

Hong Kong Adjacent Waters:
Southeast force 5 to 6, becoming southwest force 4 to 5.
Isolated squally showers and thunderstorms, mist patches.
Moderate to rough seas.

Nan'ao and Shanwei:
East to southeast force 5 to 6, becoming southwest force 4 to 5.
Isolated squally showers and thunderstorms.
Moderate to rough seas.

South of Hong Kong:
South to southeast force 5 to 6, becoming southwest force 4 to 5.
Isolated squally showers and thunderstorms.
Moderate to rough seas.

Shangchuan Dao:
South force 4 to 5.
Isolated squally showers and thunderstorms.
Moderate seas.

Outlook for the next 48 hours
South to southwesterly winds of force 4 to 5, becoming northeasterly winds of force 6. Isolated squally showers and thunderstorms.

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

Waglan Island Wind east force 4
  Visibility 1900 Metres

Dongsha Wind east force 2
  Visibility 10 Kilometres

Huangmaozhou Wind east force 4

Macau Wind south force 2
  Visibility 6 Kilometres

Xisha Wind southeast force 2
  Visibility 30 Kilometres


WEATHER FORECAST FOR LOCAL AVIATION
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Weather Forecast for Local Aviation

Bulletin issued at 17:30 HKT 25/APR/2017
(Next update at 01:30 HKT 26/APR/2017)
I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS, SEV TURB AND SEV GUSTS. 
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE AREA OF THUNDERY SHOWERS ASSOCIATED WITH AN
     UPPER-AIR DISTURBANCE IS AFFECTING THE VICINITY
     OF PEARL RIVER ESTUARY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  110/10,15-20 AT FIRST
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  100/20-25
                  BEC 180/10-15                        24-21
   B.   2000 FT:  120/20-25G35
                  BEC 200/15                           20
   C.   5000 FT:  200/20                               17
   D.  10000 FT:  240/25                               8
   E.  18000 FT:  250/25                               MS6
   F.  24000 FT:  260/30                               MS16
   G.  30000 FT:  260/35                               MS31
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH SHOWERS AND ISOLATED SQUALLY
      THUNDERSTORMS. LOCALISED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT SCT 2500 FT BKN 6000 FT 
      TEMPO FEW CB 1000 FT SCT 2000 FT BKN 4000 FT.
   K. VISIBILITY    : 7 KM. TEMPO 3000 M IN SHOWERS/MIST.
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 9000 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 2.5-4.0 M     SEA TEMPERATURE    : 22 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EAST TO SOUTHEASTERLY WINDS.  
     MAINLY CLOUDY WITH SHOWERS AND ISOLATED
     THUNDERSTORMS.=
===================================================================
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 18:50 HKT on 25 Apr 17

VHHK SIGMET 2 VALID 250650/251050 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1906 E11154 - N1930 E11130 - N2124 E11130 - N2230 E11342 - N2312 E11554 - N2030 E11536 - N1906 E11154 TOP FL380 MOV NE 05KT NC= VHHK SIGMET 3 VALID 251050/251450 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2154 E11230 - N2230 E11342 - N2318 E11624 - N2100 E11624 - N1900 E11230 - N2154 E11230 TOP FL380 MOV NE 10KT 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: <25 Apr 2017> 

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 25/Apr/2017
HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     22.8 C
Minimum Air Temperature                     20.9 C
Grass Minimum Temperature                   21.0 C
Relative Humidity                        79 - 87 Percent
Rainfall                                      Trace 
Total rainfall since 1st January           117.2 mm
Against an average of                      304.1 mm

Other Stations                Min                  Max
King's Park                  20.4 C               23.2 C
Wong Chuk Hang               20.5 C               22.6 C
Ta Kwu Ling                  19.5 C               23.4 C
Lau Fau Shan                 18.9 C               24.6 C
Tai Po                       19.5 C               21.8 C
Sha Tin                      19.9 C               22.5 C
Tuen Mun                     19.6 C               23.5 C
Tseung Kwan O                19.4 C               21.5 C
Sai Kung                     20.3 C               21.7 C
Cheung Chau                  20.1 C               22.0 C
Chek Lap Kok                 21.1 C               24.7 C
Tsing Yi                     20.3 C               23.8 C
Shek Kong                    19.6 C               24.1 C
Tsuen Wan Ho Koon            19.1 C               22.9 C
Tsuen Wan Shing Mun Valley   20.1 C               23.0 C
Hong Kong Park               20.5 C               22.1 C
Shau Kei Wan                 20.0 C               21.4 C
Kowloon City                 20.0 C               22.6 C
Happy Valley                 20.9 C               23.2 C
Wong Tai Sin                 20.5 C               23.4 C
Stanley                      20.8 C               21.9 C
Kwun Tong                    20.4 C               21.8 C
Sham Shui Po                 20.2 C               24.6 C
Kai Tak Runway Park          21.0 C               22.2 C
Yuen Long Park               19.2 C               24.4 C
Tai Mei Tuk               19.3 C               21.9 C

Duration of sunshine (King's Park):              0.1 H
The mean UV index recorded at King's Park yesterday was 2,
the UV intensity was Low.
The maximum UV index for yesterday was 4.
 

Yesterday's (24 Apr 2017) 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 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 24 Apr
Last revision date: <25 Apr 2017> 

From Weather Underground