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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 04:02 HKT 22/Apr/2017

At 4 a.m. at the Hong Kong Observatory the air temperature was 21 degrees Celsius and the relative humidity 73 per cent.

The air temperatures at other places were:

King's Park 20 degrees;
Wong Chuk Hang 21 degrees;
Ta Kwu Ling 19 degrees;
Lau Fau Shan 20 degrees;
Tai Po 20 degrees;
Sha Tin 21 degrees;
Tuen Mun 21 degrees;
Tseung Kwan O 19 degrees;
Sai Kung 21 degrees;
Cheung Chau 20 degrees;
Chek Lap Kok 21 degrees;
Tsing Yi 21 degrees;
Shek Kong 20 degrees;
Tsuen Wan Ho Koon 20 degrees;
Tsuen Wan Shing Mun Valley 21 degrees;
Hong Kong Park 21 degrees;
Shau Kei Wan 20 degrees;
Kowloon City 20 degrees;
Happy Valley 22 degrees;
Wong Tai Sin 20 degrees;
Stanley 21 degrees;
Kwun Tong 20 degrees;
Sham Shui Po 21 degrees;
Kai Tak Runway Park 21 degrees;
Yuen Long Park 20 degrees;
Tai Mei Tuk 19 degrees.


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


Climatological Information for 22 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 03:45 HKT 22/Apr/2017

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

The northeast monsoon associated with a cold front is affecting the coastal areas of Guangdong gradually.

Weather forecast for today

Mainly cloudy. There will be one or two showers at first. Cooler in the morning with a minimum temperature of about 19 degrees. Bright periods during the day with a maximum temperature of around 25 degrees. Moderate to fresh north to northeasterly winds.

Outlook : Mainly cloudy in the following couple of days.


(The above forecast period is valid up to 23:59 HKT today, 22/04/2017; 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 21/Apr/2017

N0 WARNING.

GENERAL SITUATION AT 210900 UTC:
A SOUTHERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS. IT WILL GRADUALLY BE REPLACED BY A NORTHEAST MONSOON.

MARINE FORECAST FOR 24 HOURS FROM 211300 UTC:

HONG KONG= S 4-5, BEC N UP TO 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M, BEC 3 M. TEMP 19-24 C. =
KWANGTUNG= S TO SW 4-5, BEC N 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M, BEC 3 M. =
TAIWAN STRAIT= NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M, 4 M LATER. SWELL NE UP TO 3M. =
BASHI= W TO SW 5-6 , N 6 LATER. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS LATER. SEA 2-3 M. =
PRATAS= S TO SW 4-5, N 6 LATER. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS LATER. SEA 2 M, 3 M LATER. =
BALINTANG= SW 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
SCARBOROUGH= S TO SW 4-5. ISOL SHOWERS LATER. SEA UP TO 2 M. =
PARACEL= S 5-6, NW 6 IN N LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. =
TONKIN= NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M, 4 M LATER. =
DANANG= S 5-6, N 6 IN N LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 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 03:30 HKT 22/Apr/2017

Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 22 April 2017

Warnings:
Strong winds in all areas.

Weather Situation:
A cold front associated with the northeast monsoon is affecting the coastal waters gradually.

Area forecasts for the next 24 hours

Hong Kong Adjacent Waters:
North to northeast force 5 to 6.
A few showers.
Moderate to rough seas.

Nan'ao and Shanwei:
North to northeast force 5 to 6, occasionally force 7.
Isolated squally showers and thunderstorms.
Moderate to rough seas.

South of Hong Kong:
North to northeast force 5 to 6.
Isolated squally showers and thunderstorms.
Moderate to rough seas.

Shangchuan Dao:
North force 5 to 6.
Isolated squally showers and thunderstorms.
Moderate to rough seas.

Outlook for the next 48 hours
East to northeasterly winds of force 5 to 6.

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

Waglan Island Wind north force 5
  Visibility 28 Kilometres

Shantou Wind southeast force 1
  Visibility 30 Kilometres

Huangmaozhou Wind north-northwest force 4


WEATHER FORECAST FOR LOCAL AVIATION
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Weather Forecast for Local Aviation

Bulletin issued at 01:30 HKT 22/APR/2017
(Next update at 9:00-9:30 HKT 22/APR/2017)
I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  360/10-15
       OFFSHORE:  360/20                               19-24
   B.   2000 FT:  020/20-25                            17
   C.   5000 FT:  290/15                               16
   D.  10000 FT:  270/30                               9
   E.  18000 FT:  260/40                               MS5
   F.  24000 FT:  260/60                               MS16
   G.  30000 FT:  260/70                               MS31
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      3200-3500 FT.
   I. WEATHER       : 
      MAINLY CLOUDY. THERE WILL BE ONE OR TWO SHOWERS
      AT FIRST. BRIGHT PERIODS DURING THE DAY.
   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: 15000 FT      10 DEG. C LEVEL(S) : 9800 FT
   M. TURBULENCE    : MOD TO SEV NEAR HILLS. MOD OFFSHORE.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 24 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTH TO NORTHEASTERLY WINDS.
     MAINLY CLOUDY. BRIGHT PERIODS DURING THE DAY.=
===================================================================
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 02:30 HKT on 22 Apr 17

VHHK SIGMET 4 VALID 211615/212015 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2124 E11300 - N2224 E11636 - N2036 E11636 - N1930 E11300 - N2124 E11300 TOP FL380 MOV ESE 10KT NC= VHHK SIGMET 6 VALID 211830/212230 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N1948 E11630 - N1900 E11336 - N2036 E11336 - N2154 E11730 - N2100 E11730 TOP FL380 MOV ESE 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: <18 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 22/Apr/2017
HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     29.4 C
Minimum Air Temperature                     22.8 C
Grass Minimum Temperature                   23.2 C
Relative Humidity                        79 - 94 Percent
Rainfall                                     7.8 mm 
Total rainfall since 1st January           109.2 mm
Against an average of                      283.2 mm

Other Stations                Min                  Max
King's Park                  22.9 C               29.3 C
Wong Chuk Hang               22.1 C               26.8 C
Ta Kwu Ling                  22.1 C               30.4 C
Lau Fau Shan                 22.6 C               29.2 C
Tai Po                       22.9 C               29.8 C
Sha Tin                      23.2 C               29.9 C
Tuen Mun                     23.1 C               28.9 C
Tseung Kwan O                21.6 C               28.3 C
Sai Kung                     22.6 C               29.2 C
Cheung Chau                  22.0 C               29.1 C
Chek Lap Kok                 22.4 C               30.7 C
Tsing Yi                     22.7 C               28.0 C
Shek Kong                    22.9 C               29.7 C
Tsuen Wan Ho Koon            22.4 C               26.0 C
Tsuen Wan Shing Mun Valley   22.8 C               27.8 C
Hong Kong Park               22.6 C               28.0 C
Shau Kei Wan                 22.1 C               28.9 C
Kowloon City                 22.4 C               28.7 C
Happy Valley                 23.2 C               27.9 C
Wong Tai Sin                 22.7 C               28.3 C
Stanley                      22.3 C               28.8 C
Kwun Tong                    22.9 C               28.8 C
Sham Shui Po                 22.3 C               30.5 C
Kai Tak Runway Park          22.8 C               29.1 C
Yuen Long Park               23.2 C               30.3 C
Tai Mei Tuk               21.6 C               29.0 C

Duration of sunshine (King's Park):              0.6 H
The mean UV index recorded at King's Park yesterday was 1,
the UV intensity was Low.
The maximum UV index for yesterday was 6.
 

Yesterday's (21 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 21 Apr
Last revision date: <22 Apr 2017> 

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