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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 10:02 HKT 16/Jul/2017

At 10 a.m. at the Hong Kong Observatory the air temperature was 28 degrees Celsius and the relative humidity 89 per cent.
During the past hour the mean UV Index recorded at King's Park was 3. The intensity of UV radiation was moderate.

The subtropical ridge is covering southeastern China. Tropical cyclone Talas to the south of Hainan Island is expected to move west or west-northwest today, skirting the southern part of Hainan Island and then moving into Beibu Wan, gradually moving away from Hong Kong. It will not directly affect the territory. However, under the combined effect of the subtropical ridge and Talas, it will be windier with squally showers over the northern part of the South China Sea today. People out to the sea or engaging in water sports should take note of the weather changes.

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 noon today. A few squally thunderstorms are expected to occur over Hong Kong.

The air temperatures at other places were:

King's Park 28 degrees;
Wong Chuk Hang 30 degrees;
Ta Kwu Ling 26 degrees;
Lau Fau Shan 28 degrees;
Tai Po 27 degrees;
Sha Tin 29 degrees;
Tuen Mun 31 degrees;
Tseung Kwan O 28 degrees;
Sai Kung 28 degrees;
Cheung Chau 26 degrees;
Chek Lap Kok 31 degrees;
Tsing Yi 30 degrees;
Shek Kong 28 degrees;
Tsuen Wan Ho Koon 26 degrees;
Tsuen Wan Shing Mun Valley 28 degrees;
Hong Kong Park 28 degrees;
Shau Kei Wan 28 degrees;
Kowloon City 28 degrees;
Happy Valley 30 degrees;
Wong Tai Sin 28 degrees;
Stanley 30 degrees;
Kwun Tong 28 degrees;
Sham Shui Po 30 degrees;
Kai Tak Runway Park 29 degrees;
Yuen Long Park 28 degrees;
Tai Mei Tuk 27 degrees.

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

Islands District 0 to 13 mm;
Tai Po 0 to 6 mm;
North District 0 to 3 mm;
Tsuen Wan 0 to 1 mm;
Yuen Long 0 to 1 mm.

Here is the information on Tropical Storm Talas at 10 a.m.:
Location: 17.8 degrees north, 109.1 degrees east.


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


Climatological Information for 16 Jul


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

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Bulletin updated at 09:45 HKT 16/Jul/2017

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

The subtropical ridge is covering southeastern China. Under the combined effect of the subtropical ridge and Tropical Cyclone Talas, there will be squally showers over the northern part of the South China Sea.

At 10 a.m., Tropical Storm Talas was centred about 70 kilometres southwest of Sanya. It is forecast to move west or west-northwest at about 22 kilometres per hour, skirting the seas south of Hainan Island and moving into Beibu Wan.

Weather forecast for today

Mainly cloudy with occasional squally showers and a few thunderstorms. Moderate to fresh east to southeasterly winds, occasionally strong offshore at first.

Outlook : Still showery with a few thunderstorms in the next couple of days. The weather will improve gradually midweek this week.


(The above forecast period is valid up to 23:59 HKT today, 16/07/2017; 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 09:00 HKT 16/Jul/2017

GALE WARNING AREAS: PARACEL, TONKIN AND DANANG.

GENERAL SITUATION AT 152100 UTC:
FOR DETAILS ON TROPICAL STORM TALAS (1704), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 160100 UTC:

HONG KONG= E TO SE 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S 2 M. TEMP 29-26 C. =
KWANGTUNG= E TO SE 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL S 2 M. =
TAIWAN STRAIT= S TO SE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL S 2 M. =
BASHI= E TO SE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S 2 M. =
PRATAS= E TO SE 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL S 2 M. =
BALINTANG= E TO SE 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S 2 M. =
SCARBOROUGH= S TO SE 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S 2 M. =
PARACEL= SE 7-8. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL S 2-3 M. =
TONKIN= NE 7-8, BEC CYCLONIC 8-9. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M, BEC 6-8 M. SWELL N 2-3 M. =
DANANG= CYCLONIC 8-9, BEC SE 7-8. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 6-8 M, BEC 4-6 M. SWELL N 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

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Bulletin issued at 10:00 HKT 16/Jul/2017

Weather information for south China coastal waters issued by the Hong Kong Observatory at 10:00 a.m. on 16 July 2017

Warnings:
Strong winds in all areas.

Weather Situation:
An easterly airstream is affecting the coastal waters of Guangdong.

At 10 a.m., Tropical Storm Talas with maximum sustained winds of about 75 kilometres per hour near its centre was located at 17.8 degrees north, 109.1 degrees east, it is forecast to move west or west-northwest at about 22 kilometres per hour skirting the seas south of Hainan Island and moving into Beibu Wan.

Area forecasts for the next 24 hours

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

Nan'ao, Shanwei and South of Hong Kong:
East to southeast force 5 to 6, occasionally force 7.
Scattered squally showers and thunderstorms.
Moderate to rough seas.

Shangchuan Dao:
East to southeast force 6 to 7.
Frequent heavy squally showers and thunderstorms.
Rough seas.

Outlook for the next 48 hours
East to southeasterly winds of force 5 to 6, southeasterly winds of force 7 to 8 in west at first. Frequent squally showers and thunderstorms.

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

Waglan Island Wind east-southeast force 4
  Visibility 13 Kilometres

Shantou Wind east force 2
  Visibility 30 Kilometres

Dongsha Wind southeast force 2
  Visibility 10 Kilometres

Huangmaozhou Wind east-southeast force 5

Macau Wind east force 3
  Visibility 14 Kilometres

Xisha Wind south-southeast force 3
  Visibility 16 Kilometres


WEATHER FORECAST FOR LOCAL AVIATION
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Weather Forecast for Local Aviation

Bulletin issued at 09:30 HKT 16/JUL/2017
(Next update at 17:30 HKT 16/JUL/2017)
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 COASTAL
     AREAS OF GUANGDONG.
     AT 8 A.M., TROPICAL STORM TALAS WAS LOCATED AT
     17.5 DEGREES NORTH, 109.5 DEGREES EAST. IT IS
     FORECAST TO MOVE WEST OR WEST-NORTHWEST AT ABOUT
     10 KNOTS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  100/10-15
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  110/20-25                            29-32
   B.   2000 FT:  120/25-30                            24
   C.   5000 FT:  120/25                               18
   D.  10000 FT:  110/20                               11
   E.  18000 FT:  120/30                               MS2
   F.  24000 FT:  100/20                               MS14
   G.  30000 FT:  120/25                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH SQUALLY SHOWERS AND A FEW
      THUNDERSTORMS.
   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, 
                      OFFSHORE AND  NEAR HILLS
   N. SEA STATE     : 3.0-4.0 M     SEA TEMPERATURE    : 28 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EAST TO SOUTHEASTERLY WINDS.
     MAINLY CLOUDY WITH SQUALLY SHOWERS AND A FEW
     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 09:30 HKT on 16 Jul 17

VHHK SIGMET 1 VALID 160130/160500 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1954 E11130 - N2124 E11130 - N2230 E11342 - N2018 E11400 - N1954 E11130 TOP FL400 MOV NW 20KT NC= VHHK SIGMET 9 VALID 152130/160130 VHHH- VHHK HONG KONG FIR EMBD TS FCST SW OF LINE N2242 E11424 - N1936 E11624 TOP FL450 MOV NW 20KT 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: <16 Jul 2017> 

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 09:30 HKT 16/Jul/2017


Tropical Cyclone Warning

At 160000 UTC, Tropical Storm Talas (1704) with central pressure 992 hectopascals was centred within 60 nautical miles of one seven point six degrees north (17.6 N) one zero nine point four degrees east (109.4 E) and is forecast to move west or west-northwest at about 12 knots for the next 24 hours.

Maximum winds near the centre are estimated to be 40 knots.

Radius of over 33 knot winds 30 nautical miles.
Radius of over 2 metre waves 240 nautical miles.

Forecast position and intensity at 170000 UTC
One eight point nine degrees north (18.9 N)
One zero four point seven degrees east (104.7 E)
Maximum winds 40 knots.

Forecast position and intensity at 180000 UTC
Dissipated over land.




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 16/Jul/2017
HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.1 C
Minimum Air Temperature                     27.0 C
Grass Minimum Temperature                   26.2 C
Relative Humidity                        75 - 94 Percent
Rainfall                                     8.8 mm 
Total rainfall since 1st January          1352.0 mm
Against an average of                     1261.9 mm

Other Stations                Min                  Max
King's Park                  26.6 C               32.3 C
Wong Chuk Hang               26.4 C               31.6 C
Ta Kwu Ling                  25.8 C               32.2 C
Lau Fau Shan                 25.8 C               33.5 C
Tai Po                       26.1 C               30.1 C
Sha Tin                      26.5 C               32.1 C
Tuen Mun                     26.4 C               32.8 C
Tseung Kwan O                26.3 C               31.8 C
Sai Kung                     26.5 C               30.7 C
Cheung Chau                  25.2 C               29.8 C
Chek Lap Kok                 26.9 C               34.5 C
Tsing Yi                     26.3 C               32.6 C
Shek Kong                    26.6 C               32.5 C
Tsuen Wan Ho Koon            25.9 C               31.1 C
Tsuen Wan Shing Mun Valley   27.0 C               32.3 C
Hong Kong Park               25.6 C               31.2 C
Shau Kei Wan                 24.5 C               30.8 C
Kowloon City                 25.9 C               31.6 C
Happy Valley                 26.9 C               31.5 C
Wong Tai Sin                 26.8 C               31.7 C
Stanley                      25.6 C               31.6 C
Kwun Tong                    26.5 C               30.7 C
Sham Shui Po                 26.5 C               32.5 C
Kai Tak Runway Park          25.3 C               31.1 C
Yuen Long Park               26.6 C               33.4 C
Tai Mei Tuk               26.1 C               30.5 C

Duration of sunshine (King's Park):              5.1 H
The mean UV index recorded at King's Park yesterday was 5,
the UV intensity was Moderate.
The maximum UV index for yesterday was 12.
 

Yesterday's (15 Jul 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                             0.08
Kat O                               0.08
Yuen Ng Fan                         0.11
Tai Mei Tuk                         0.11
Sha Tau Kok                         0.10
Kwun Tong                           0.11
Sai Wan Ho                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.12
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 15 Jul
Last revision date: <16 Jul 2017> 

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