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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 09:02 HKT 19/Jul/2018

At 9 a.m. at the Hong Kong Observatory the air temperature was 29 degrees Celsius and the relative humidity 81 per cent.
During the past hour the mean UV Index recorded at King's Park was 2. The intensity of UV radiation was low.

Hot weather might cause adverse health effects. The Observatory advises the public to stay on the alert.

The air temperatures at other places were:

King's Park 29 degrees;
Wong Chuk Hang 29 degrees;
Ta Kwu Ling 29 degrees;
Lau Fau Shan 29 degrees;
Tai Po 29 degrees;
Sha Tin 30 degrees;
Tuen Mun 30 degrees;
Tseung Kwan O 29 degrees;
Sai Kung 29 degrees;
Cheung Chau 28 degrees;
Chek Lap Kok 30 degrees;
Tsing Yi 30 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 29 degrees;
Wong Tai Sin 29 degrees;
Stanley 29 degrees;
Kwun Tong 28 degrees;
Sham Shui Po 30 degrees;
Kai Tak Runway Park 29 degrees;
Yuen Long Park 29 degrees;
Tai Mei Tuk 29 degrees.

Between midnight and 9 a.m. the minimum temperature was 27.9 degrees Celsius at the Hong Kong Observatory.


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


Climatological Information for 19 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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UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 08:45 HKT 19/Jul/2018

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

A ridge of high pressure is bringing a strong easterly airstream to the coast of Guangdong.

At 8 a.m., Tropical Storm Son-Tinh was centred about 230 kilometres south-southwest of Ha Noi. It is forecast to move west-northwest at about 10 kilometres per hour across the northern part of Vietnam. Meanwhile, Tropical Depression Ampil was centred about 760 kilometres south-southeast of Okinawa. It is forecast to move slowly and linger over the seas east of the Philippines.

Weather forecast for today

Sunny periods and a few showers. Hot with a maximum temperature of about 32 degrees. Moderate to fresh easterly winds, occasionally strong offshore at first.

Outlook : Hot with sunny periods and a few showers in the next couple of days.


(The above forecast period is valid up to 23:59 HKT today, 19/07/2018; 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 19/Jul/2018

N0 WARNING.

GENERAL SITUATION AT 182100 UTC:
FOR DETAILS ON TROPICAL STORM SON-TINH (1809), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 190100 UTC:

HONG KONG= E 5-6, 7 AT FIRST. ISOL SHOWERS AND TS. SEA 2-3 M, 4 M AT FIRST. SWELL E 2 M. TEMP 32-28 C. =
KWANGTUNG= E 6-7. ISOL SHOWERS AND TS. SEA 3-4 M. SWELL E 2 M. =
TAIWAN STRAIT= NE 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL NE 2 M. =
BASHI= N TO NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL SW 2-3 M, E 2-3 M. =
PRATAS= E TO SE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL SW 2-3 M. =
BALINTANG= N TO NW 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL SW 2-3 M, E 2-3 M. =
SCARBOROUGH= SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2-3 M. =
PARACEL= S TO SE 5, OCNL 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL SW 2-3 M. =
TONKIN= S TO SE 5, 6-7 AT FIRST. ISOL SHOWERS AND TS. SEA UP TO 2 M, 3-4 M AT FIRST. SWELL NE 2-3 M. =
DANANG= S TO SE 4-5. ISOL SHOWERS. SEA UP TO 2 M. SWELL SW 2-3 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 09:30 HKT 19/Jul/2018

Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 19 July 2018

Warnings:
Strong winds in all areas.

Weather Situation:
An easterly airstream is affecting the south China coastal waters.

Tropical Storm Son-Tinh has weakened into a tropical depression. At 9 a.m., Son-Tinh with maximum sustained winds of about 55 kilometres per hour near its centre was located near 19.3 degrees north, 104.5 degrees east. It is forecast to move west-northwest at about 10 kilometres per hour towards inland of the northern part of Vietnam and weakening gradually.

Area forecasts for the next 24 hours

Hong Kong Adjacent Waters:
East force 5 to 6, force 7 at first.
Isolated showers and thunderstorms.
Moderate to rough seas.

Nan'ao, Shanwei and South of Hong Kong:
East force 6 to 7.
Isolated showers and thunderstorms.
Rough seas.

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

Outlook for the next 48 hours
Easterly winds of force 5 to 6. Isolated showers and thunderstorms.

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

Waglan Island Wind east-northeast force 5

Shantou Wind east-northeast force 2
  Visibility 30 Kilometres

Dongsha Wind southeast force 2
  Visibility 10 Kilometres

Huangmaozhou Wind east force 5

Macau Wind east force 3
  Visibility 19 Kilometres

Xisha Wind south-southwest force 4
  Visibility 12 Kilometres


WEATHER FORECAST FOR LOCAL AVIATION
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Weather Forecast for Local Aviation

Bulletin issued at 01:30 HKT 19/JUL/2018
(Next update at 9:00-9:30 HKT 19/JUL/2018)
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 :
     AN EASTERLY AIRSTREAM IS AFFECTING THE SOUTH CHINA COASTAL
     AREAS. AT 11 P.M. LAST NIGHT, TROPICAL STORM SON-TINH WAS
     CENTRED NEAR 18.8 DEGREES NORTH, 106.1 DEGREES EAST. IT IS
     FORECAST TO MOVE WEST AT ABOUT 10 KNOTS ACROSS BEIBU WAN
     AND THE NORTHERN PART OF VIETNAM.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  100/10-15
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  100/15-20, OCNL 25                   27-32
   B.   2000 FT:  100/20-25, OCNL 30                   24
   C.   5000 FT:  120/30                               20
   D.  10000 FT:  120/25                               12
   E.  18000 FT:  100/20                               MS1
   F.  24000 FT:  100/20                               MS19
   G.  30000 FT:  080/15                               MS22
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH SHOWERS AND A FEW ISOLATED
      THUNDERSTORMS. SUNNY INTERVALS DURING THE DAY.
   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) : 11800 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 3.0-4.0 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY WINDS, FRESH OFFSHORE. SUNNY INTERVALS. 
     ISOLATED SHOWERS AND A FEW THUNDERSTORMS AT FIRST.=
===================================================================
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 05:55 HKT on 19 Jul 18

VHHK SIGMET 4 VALID 181755/182155 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2000 E11642 - N2000 E11130 - N1930 E11130 - N1830 E11230 - N1730 E11436 - N2000 E11642 TOP FL450 MOV W 10KT NC= VHHK SIGMET 5 VALID 182155/190155 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1900 E11554 - N2000 E11130 - N1930 E11130 - N1730 E11318 - N1730 E11436 - N1900 E11554 TOP FL450 MOV W 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: <19 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 06:30 HKT 19/Jul/2018


Tropical Cyclone Warning

At 182100 UTC, Tropical Storm Son-Tinh (1809) with central pressure 994 hectopascals was centred within 60 nautical miles of one nine point two degrees north (19.2 N) one zero four point seven degrees east (104.7 E) and is forecast to move west-northwest at about 8 knots for the next 24 hours.

Maximum winds near the centre are estimated to be 35 knots.

Radius of over 33 knot winds 30 nautical miles.
Radius of over 2 metre waves 120 nautical miles.

No further warnings on this Tropical Storm will be issued by the Hong Kong Observatory unless it re-enters the Hong Kong area of responsibility.




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 19/Jul/2018
HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     29.5 C
Minimum Air Temperature                     26.4 C
Grass Minimum Temperature                   25.5 C
Relative Humidity                        79 - 95 Percent
Rainfall                                    29.6 mm 
Total rainfall since 1st January           909.9 mm
Against an average of                     1308.5 mm

Other Stations                Min                  Max
King's Park                  25.9 C               29.5 C
Wong Chuk Hang               26.1 C               30.0 C
Ta Kwu Ling                  25.3 C               30.8 C
Lau Fau Shan                 24.8 C               29.3 C
Tai Po                       25.5 C               29.6 C
Sha Tin                      25.9 C               30.3 C
Tuen Mun                     26.3 C               30.2 C
Tseung Kwan O                25.8 C               28.6 C
Sai Kung                     25.7 C               30.0 C
Cheung Chau                  25.0 C               29.4 C
Chek Lap Kok                 26.7 C               31.5 C
Tsing Yi                     26.6 C               30.1 C
Shek Kong                    25.7 C               29.8 C
Tsuen Wan Ho Koon            24.8 C               27.5 C
Tsuen Wan Shing Mun Valley   25.6 C               28.8 C
Hong Kong Park               25.3 C               29.3 C
Shau Kei Wan                 25.2 C               29.4 C
Kowloon City                 25.4 C               29.1 C
Happy Valley                 26.7 C               29.8 C
Wong Tai Sin                 25.9 C               29.0 C
Stanley                      25.7 C               29.5 C
Kwun Tong                    26.1 C               29.0 C
Sham Shui Po                 26.2 C               29.9 C
Kai Tak Runway Park          25.8 C               29.4 C
Yuen Long Park               25.6 C               30.4 C
Tai Mei Tuk               25.0 C               29.1 C

Duration of sunshine (King's Park):              1.0 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 6.
 

Yesterday's (18 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                           0.08
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                      0.12
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 18 Jul
Last revision date: <19 Jul 2018> 

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