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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 15:06 HKT 19/Jul/2018

At 3 p.m. at the Hong Kong Observatory the air temperature was 30 degrees Celsius and the relative humidity 80 per cent.
During the past hour the mean UV Index recorded at King's Park was 6. The intensity of UV radiation was high.

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

Gusts reaching 70 kilometres per hour or above may continue to affect Hong Kong.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 4:30 p.m. today. Isolated squally thunderstorms are expected to occur over Hong Kong.

The air temperatures at other places were:

King's Park 30 degrees;
Wong Chuk Hang 28 degrees;
Ta Kwu Ling 32 degrees;
Lau Fau Shan 31 degrees;
Tai Po 30 degrees;
Sha Tin 31 degrees;
Tuen Mun 31 degrees;
Tseung Kwan O 29 degrees;
Sai Kung 29 degrees;
Cheung Chau 25 degrees;
Chek Lap Kok 31 degrees;
Tsing Yi 31 degrees;
Shek Kong 31 degrees;
Tsuen Wan Ho Koon 30 degrees;
Tsuen Wan Shing Mun Valley 30 degrees;
Hong Kong Park 28 degrees;
Shau Kei Wan 29 degrees;
Kowloon City 29 degrees;
Happy Valley 29 degrees;
Wong Tai Sin 29 degrees;
Stanley 26 degrees;
Kwun Tong 29 degrees;
Sham Shui Po 31 degrees;
Kai Tak Runway Park 29 degrees;
Yuen Long Park 32 degrees;
Tai Mei Tuk 30 degrees.

Between 1:45 and 2:45 p.m., lightning was detected within Lantau. The rainfall recorded in various regions were:

Islands District 0 to 27 mm;
Southern District 0 to 23 mm.


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 14:45 HKT 19/Jul/2018

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

The easterly airstream affecting the coast of Guangdong is moderating gradually. Meanwhile, a broad trough of low pressure is bringing showers to the region. Locally, showers before noon brought more than 5 millimetres of rainfall to Hong Kong Island.

At noon, Tropical Storm Ampil was centred about 750 kilometres south-southeast of Okinawa. It is forecast to move northeast slowly at first, and then move north-northwest later at about 15 kilometres per hour, towards the seas near the Ryukyu Islands. Besides, Tropical Depression Son-Tinh has weakened into an area of low pressure over the northern part of Vietnam.

Weather forecast for this afternoon and tonight

Mainly cloudy with a few showers. Isolated thunderstorms at first. Hot with sunny periods in the afternoon. 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 12:30 HKT 19/Jul/2018

Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 19 July 2018

Warnings:
Strong winds in all areas.

Weather Situation:
An easterly airstream is affecting the south China coastal waters. Meanwhile, a broad area of low pressure is bringing unsettled weather to the south China coastal waters.

Area forecasts for the next 24 hours

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

Nan'ao, Shanwei, South of Hong Kong and 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 4 to 5, occasionally force 6. Isolated showers and thunderstorms.

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

Waglan Island Wind east force 4 with gusts to force 6

Shantou Wind east force 2
  Visibility 30 Kilometres

Dongsha Wind southeast force 1
  Visibility 9 Kilometres

Huangmaozhou Wind east-southeast force 5

Macau Wind east force 3
  Visibility 11 Kilometres in rain

Xisha Wind southwest force 4
  Visibility 17 Kilometres


WEATHER FORECAST FOR LOCAL AVIATION
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Weather Forecast for Local Aviation

Bulletin issued at 12:30 HKT 19/JUL/2018
(Next update at 17:30 HKT 19/JUL/2018)
I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB. ISOL CUNIM/TS AND
     ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS. MEANWHILE, A BROAD AREA OF
     LOW PRESSURE IS BRINGING UNSETTLED WEATHER TO
     THE SOUTH CHINA COASTAL AREAS.
     TROPICAL DEPRESSION SON-TINH HAS WEAKENED INTO A
     LOW PRESSURE AREA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1300 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/10-15
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  090/15-20, OCNL 25 AT FIRST          32-29
   B.   2000 FT:  110/15-20, OCNL 25                   22
   C.   5000 FT:  090/30                               18
   D.  10000 FT:  100/35                               12
   E.  18000 FT:  110/15                               MS1
   F.  24000 FT:  090/25                               MS10
   G.  30000 FT:  090/15                               MS24
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS. ISOLATED
      THUNDERSTORMS AT FIRST. 
      SUNNY PERIODS IN THE AFTERNOON.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 3000 FT. TEMPO FEW CB 800 FT
      SCT 1200 FT BKN 5000 FT
   K. VISIBILITY    : 10 KM. TEMPO 4000 M IN SHOWERS. TEMPO 2000 M IN TS
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 12000 FT
   M. TURBULENCE    : MOD TO SEV
   N. SEA STATE     : 2.0-3.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY WINDS, FRESH OFFSHORE. MAINLY
     CLOUDY. ISOLATED SHOWERS.=
===================================================================
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 13:53 HKT on 19 Jul 18

VHHK SIGMET 1 VALID 190155/190555 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1848 E11542 - N1730 E11436 - N1712 E11336 - N1912 E11142 - N1924 E11324 - N1848 E11542 TOP FL450 MOV W 10KT NC= VHHK SIGMET 2 VALID 190555/190955 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1724 E11436 - N1754 E11400 - N1854 E11400 - N1900 E11548 - N1724 E11436 TOP FL420 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: <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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