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

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Weather Information for South China Coastal Waters

Bulletin issued at 19:02 HKT 22/Jul/2018

At 7 p.m. at the Hong Kong Observatory the air temperature was 29 degrees Celsius and the relative humidity 68 per cent.

The air temperatures at other places were:

King's Park 28 degrees;
Wong Chuk Hang 28 degrees;
Ta Kwu Ling 29 degrees;
Lau Fau Shan 28 degrees;
Tai Po 30 degrees;
Sha Tin 30 degrees;
Tuen Mun 28 degrees;
Tseung Kwan O 28 degrees;
Sai Kung 30 degrees;
Cheung Chau 27 degrees;
Chek Lap Kok 29 degrees;
Tsing Yi 28 degrees;
Shek Kong 29 degrees;
Tsuen Wan Ho Koon 27 degrees;
Tsuen Wan Shing Mun Valley 29 degrees;
Hong Kong Park 29 degrees;
Shau Kei Wan 29 degrees;
Kowloon City 29 degrees;
Happy Valley 30 degrees;
Wong Tai Sin 30 degrees;
Stanley 28 degrees;
Kwun Tong 29 degrees;
Sham Shui Po 28 degrees;
Kai Tak Runway Park 29 degrees;
Yuen Long Park 29 degrees;
Tai Mei Tuk 29 degrees.

Here is the information on Tropical Depression at 7 p.m.:
Location: 23.2 degrees north, 123.7 degrees east.

Here is the information on Tropical Depression at 7 p.m.:
Location: 19.3 degrees north, 108.4 degrees east.


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


Climatological Information for 22 Jul


Local Weather Forecast
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Local Weather Forecast

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

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Bulletin updated at 18:45 HKT 22/Jul/2018

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

Showers are affecting Guangdong and the northern part of the South China Sea.

At 7 p.m., the tropical depression over Beibu Wan was centred about 220 kilometres west-southwest of Haikou. It is forecast to move northeast slowly and linger over the vicinity of Beibu Wan and the coast of western Hainan Island. Meanwhile, the tropical depression to the east of Taiwan was centred about 300 kilometres southeast of Taibei. It is forecast to move north at about 20 kilometres per hour across the seas east of Taiwan. Besides, Severe Tropical Storm Ampil has weakened into a tropical storm. At 7 p.m., Ampil was centred about 150 kilometres north of Shanghai. It is forecast to move northwest at about 25 kilometres per hour across the vicinity of Jiangsu.

Weather forecast for tonight and tomorrow

Mainly cloudy with a few showers. More showers and a few squally thunderstorms tomorrow. Temperatures will range between 26 and 30 degrees. Moderate southerly winds, occasionally fresh offshore.

Outlook : A few showers in the following couple of days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 23/07/2018; 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 09:00 HKT 22/Jul/2018

N0 WARNING.

GENERAL SITUATION AT 212100 UTC:
FOR DETAILS ON THE TROPICAL DEPRESSION OVER LUZON STRAIT, PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS. FOR DETAILS ON THE TROPICAL DEPRESSION OVER GULF OF TONKIN, PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 220100 UTC:

HONG KONG= S TO SW 3-4. ISOL SHOWERS. TEMP 33-27 C. =
KWANGTUNG= S TO SW 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. =
TAIWAN STRAIT= W TO NW 4-5, BEC SW 5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
BASHI= CYCLONIC 6-7, W TO SW 6 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL SW 2-3 M. =
PRATAS= W TO SW 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. SWELL SW 2 M. =
BALINTANG= W TO SW 5-6, 7 AT FIRST. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 2-4 M. SWELL SW 2-3 M. =
SCARBOROUGH= SW 5-6, OCNL 7 AT FIRST. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA 2-4 M. SWELL SW 2 M. =
PARACEL= S 5-6. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS IN N. SEA 2-3 M. SWELL SW 2-3 M. =
TONKIN= CYCLONIC 6-7. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M. =
DANANG= S TO SW 5-6, OCNL 7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-4 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

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9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

Bulletin issued at 19:30 HKT 22/Jul/2018

Weather information for south China coastal waters issued by the Hong Kong Observatory at 7:30 p.m. on 22 July 2018

Warnings:
Strong winds in south of Hong Kong and Shangchuan Dao.

Weather Situation:
At 7 p.m., the tropical depression over Beibu Wan with maximum sustained winds of about 55 kilometres per hour near its centre was located near 19.3 degrees north, 108.4 degrees east. It is forecast to move northeast slowly and linger over the vicinity of Beibu Wan and the coast of western Hainan Island. Meanwhile, the tropical depression to the east of Taiwan with maximum sustained winds of about 55 kilometres per hour near its centre was located near 23.2 degrees north, 123.7 degrees east. It is forecast to move north at about 20 kilometres per hour across the seas east of Taiwan.

Area forecasts for the next 24 hours

Hong Kong Adjacent Waters:
South to southwest force 4 to 5.
Scattered squally showers and thunderstorms.
Moderate seas.

Nan'ao and Shanwei:
Southwest force 4 to 5.
Isolated showers and thunderstorms.
Moderate seas.

South of Hong Kong and Shangchuan Dao:
South to southwest force 5 to 6.
Scattered squally showers and thunderstorms.
Moderate to rough seas.

Outlook for the next 48 hours
South to southwesterly winds of force 5 to 6, up to force 7 at first. Scattered squally showers and thunderstorms.

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

Waglan Island Wind west force 3
  Visibility 40 Kilometres

Shantou Wind west-southwest force 2
  Visibility 30 Kilometres

Dongsha Wind west-southwest force 2
  Visibility 10 Kilometres

Huangmaozhou Wind south-southwest force 1

Macau Wind southwest force 2
  Visibility 24 Kilometres

Xisha Wind southwest force 4
  Visibility 13 Kilometres


WEATHER FORECAST FOR LOCAL AVIATION
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Weather Forecast for Local Aviation

Bulletin issued at 17:30 HKT 22/JUL/2018
(Next update at 01:30 HKT 23/JUL/2018)
I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     SHOWERS ARE AFFECTING GUANGDONG AND THE NORTHERN
     PART OF THE SOUTH CHINA SEA.
     AT 4 P.M., THE TROPICAL DEPRESSION OVER BEIBU
     WAN WAS CENTRED NEAR 19.3 DEGREES NORTH, 108.3
     DEGREES EAST.  IT IS FORECAST TO MOVE NORTHEAST
     SLOWLY AND LINGER OVER THE VICINITY OF BEIBU WAN
     AND THE COAST OF WESTERN HAINAN ISLAND.
     MEANWHILE, THE TROPICAL DEPRESSION TO THE EAST
     OF TAIWAN WAS CENTRED NEAR 22.6 DEGREES NORTH,
     123.7 DEGREES EAST.  IT IS FORECAST TO MOVE
     NORTH-NORTHEAST AT ABOUT 12 KNOTS ACROSS THE
     SEAS EAST OF TAIWAN.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  200/10
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  200/15                               29-26
   B.   2000 FT:  200/15-20                            23
   C.   5000 FT:  180/20                               20
   D.  10000 FT:  190/20                               12
   E.  18000 FT:  190/15                               MS1
   F.  24000 FT:  230/15                               MS12
   G.  30000 FT:  240/15                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH ISOLATED SHOWERS.  MORE
      SHOWERS AND A FEW SQUALLY THUNDERSTORMS  LATER.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 3000 FT.  TEMPO FEW CB 1000 FT
      SCT 2000 FT  BKN 4000 FT.
   K. VISIBILITY    : 10 KM.  TEMPO 4000 M IN SHOWERS.
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 11000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS.
                      MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.5-2.0 M     SEA TEMPERATURE    : 28 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHERLY WINDS, OCCASIONALLY FRESH
     OFFSHORE.  MAINLY CLOUDY WITH OCCASIONAL SHOWERS
     AND ISOLATED SQUALLY 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 18:21 HKT on 22 Jul 18

VHHK SIGMET 4 VALID 220630/221030 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1842 E11430 - N1824 E11230 - N1930 E11130 - N2130 E11130 - N2236 E11412 - N2242 E11442 - N1842 E11430 TOP FL500 MOV N 10KT NC= VHHK SIGMET 5 VALID 221030/221430 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1930 E11436 - N1800 E11254 - N1930 E11130 - N2130 E11130 - N2224 E11336 - N1930 E11436 TOP FL460 MOV N 10KT WKN=

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: <22 Jul 2018> 

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 18:32 HKT 22/Jul/2018


Tropical Cyclone Warning

At 220900 UTC, the tropical depression over Gulf of Tonkin with central pressure 992 hectopascals was centred within 60 nautical miles of one nine point one degrees north (19.1 N) one zero eight point three degrees east (108.3 E) and is forecast to move northeast slowly for the next 24 hours.

Maximum winds near the centre are estimated to be 30 knots.

Radius of over 2 metre waves 90 nautical miles.

Forecast position and intensity at 230900 UTC
Two zero point six degrees north (20.6 N)
One zero nine point seven degrees east (109.7 E)
Maximum winds 35 knots.

Forecast position and intensity at 240900 UTC
Two two point one degrees north (22.1 N)
One zero nine point three degrees east (109.3 E)
Maximum winds 25 knots.

Forecast position and intensity at 250900 UTC
Dissipated over land.


Bulletin issued at 18:30 HKT 22/Jul/2018


Tropical Cyclone Warning

At 220900 UTC, the tropical depression east of Taiwan with central pressure 998 hectopascals was centred within 90 nautical miles of two two point seven degrees north (22.7 N) one two three point seven degrees east (123.7 E) and is forecast to move north at about 10 knots for the next 24 hours.

Maximum winds near the centre are estimated to be 30 knots.

Radius of over 2 metre waves 120 nautical miles over southern semicircle, 60 nautical miles elsewhere.

Forecast position and intensity at 230900 UTC
Dissipated over sea.




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 22/Jul/2018
HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     33.1 C
Minimum Air Temperature                     27.4 C
Grass Minimum Temperature                   26.2 C
Relative Humidity                        59 - 88 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January           934.3 mm
Against an average of                     1347.0 mm

Other Stations                Min                  Max
King's Park                  26.6 C               32.6 C
Wong Chuk Hang               25.4 C               31.2 C
Ta Kwu Ling                  25.1 C               34.0 C
Lau Fau Shan                 25.7 C               32.2 C
Tai Po                       26.1 C               32.6 C
Sha Tin                      26.1 C               34.0 C
Tuen Mun                     25.9 C               32.3 C
Tseung Kwan O                25.5 C               33.7 C
Sai Kung                     26.5 C               33.2 C
Cheung Chau                  25.7 C               31.9 C
Chek Lap Kok                 26.7 C               33.8 C
Tsing Yi                     26.1 C               32.5 C
Shek Kong                    25.2 C               34.6 C
Tsuen Wan Ho Koon            24.5 C               30.8 C
Tsuen Wan Shing Mun Valley   24.9 C               32.8 C
Hong Kong Park               26.1 C               33.6 C
Shau Kei Wan                 26.3 C               32.3 C
Kowloon City                 26.7 C               33.3 C
Happy Valley                 26.0 C               33.6 C
Wong Tai Sin                 26.1 C               33.7 C
Stanley                      26.2 C               32.1 C
Kwun Tong                    26.5 C               33.0 C
Sham Shui Po                 26.8 C               33.3 C
Kai Tak Runway Park          27.1 C               32.1 C
Yuen Long Park               25.0 C               34.5 C
Tai Mei Tuk               26.3 C               33.7 C

Duration of sunshine (King's Park):              8.0 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.
 

Yesterday's (21 Jul 2018) 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                           0.09
Tap Mun                             0.08
Kat O                               0.10
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.11
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.08
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 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 21 Jul
Last revision date: <22 Jul 2018> 

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