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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 15:02 HKT 11/Jul/2018

At 3 p.m. at the Hong Kong Observatory the air temperature was 32 degrees Celsius and the relative humidity 60 per cent.
During the past hour the mean UV Index recorded at King's Park was 7. The intensity of UV radiation was high.

Please be reminded that:

The Very Hot Weather Warning is now in force. Very hot weather might cause adverse health effects. Members of the public should take care to avoid heatstroke.

The air temperatures at other places were:

King's Park 32 degrees;
Wong Chuk Hang 31 degrees;
Ta Kwu Ling 35 degrees;
Lau Fau Shan 33 degrees;
Tai Po 35 degrees;
Sha Tin 33 degrees;
Tuen Mun 32 degrees;
Tseung Kwan O 33 degrees;
Sai Kung 34 degrees;
Cheung Chau 33 degrees;
Chek Lap Kok 33 degrees;
Tsing Yi 31 degrees;
Shek Kong 34 degrees;
Tsuen Wan Ho Koon 31 degrees;
Tsuen Wan Shing Mun Valley 32 degrees;
Hong Kong Park 32 degrees;
Shau Kei Wan 33 degrees;
Kowloon City 33 degrees;
Happy Valley 33 degrees;
Wong Tai Sin 33 degrees;
Stanley 30 degrees;
Kwun Tong 33 degrees;
Sham Shui Po 31 degrees;
Kai Tak Runway Park 33 degrees;
Yuen Long Park 35 degrees;
Tai Mei Tuk 33 degrees.

Here is the information on Typhoon Maria at noon:
Location: 26.3 degrees north, 119.0 degrees east.


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


Climatological Information for 11 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 14:45 HKT 11/Jul/2018

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

The subsiding air in the outer circulation of Tropical Cyclone Maria is bringing generally fine and very hot weather to Guangdong. Locally, temperatures over parts of the territory rose to about 33 degrees around noon.

Severe Typhoon Maria has weakened into a typhoon. At noon, Maria was centred about 40 kilometres northwest of Fuzhou. It is forecast to move west-northwest at about 25 kilometres per hour across inland Fujian and weaken gradually.

Weather forecast for this afternoon and tonight

Mainly fine. Very hot in the afternoon. Light winds, becoming moderate southerly winds.

Outlook : Sunny periods tomorrow. Squally showers and thunderstorms in the following few days.


(The above forecast period is valid up to 23:59 HKT today, 11/07/2018; 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 11/Jul/2018

HURRICANE WARNING AREA: TAIWAN STRAIT.
GALE WARNING AREAS: KWANGTUNG AND BASHI.

GENERAL SITUATION AT 102100 UTC:
FOR DETAILS ON SEVERE TYPHOON MARIA (1808), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 110100 UTC:

HONG KONG= SE 3-4. FINE. TEMP 33-28 C. =
KWANGTUNG= S 4-5, UP TO 8 IN E. FINE. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS IN E. SEA UP TO 6 M. SWELL S UP TO 2 M. =
TAIWAN STRAIT= SW 11-12, SE 6-7 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 12-14 M, 3-4 M LATER. SWELL E TO NE 5-7 M. =
BASHI= S TO SW 6-7, UP TO 8 AT FIRST. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 6 M AT FIRST. SWELL E TO NE 3-5 M. =
PRATAS= S TO SW 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M, E TO NE 2-3 M. =
BALINTANG= S TO SW 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL E TO NE 3-5 M. =
SCARBOROUGH= S TO SW 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M, NE 2-3 M. =
PARACEL= S 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M. =
TONKIN= E TO NE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= N TO NW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL S UP TO 2 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 12:30 HKT 11/Jul/2018

Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 11 July 2018

Warnings:
Gale force winds in Nan'ao. Strong winds in Shanwei.

Weather Situation:
A broad area of low pressure is bringing unsettled weather to the south China coastal waters.

Severe Typhoon Maria has weakened into a typhoon. At noon, Maria with maximum sustained winds of about 120 kilometres per hour near its centre was located near 26.3 degrees north, 119.0 degrees east. It is forecast to move west-northwest at about 25 kilometres per hour across inland Fujian and weaken gradually.

Area forecasts for the next 24 hours

Hong Kong Adjacent Waters:
South to southeast force 3 to 4.
Slight to moderate seas.

Nan'ao:
South to southwest force 7 to 8.
Scattered squally showers and thunderstorms.
Rough to very rough seas.

Shanwei:
South to southwest force 5 to 6, occasionally force 7.
Isolated showers and thunderstorms.
Moderate to rough seas.

South of Hong Kong and Shangchuan Dao:
South to southeast force 4 to 5.
Isolated showers and thunderstorms.
Moderate seas.

Outlook for the next 48 hours
South to southeasterly winds of force 6 to 7. Isolated squally showers and thunderstorms.

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

Waglan Island Wind southwest force 3
  Visibility 22 Kilometres

Shantou Wind west-southwest force 2
  Visibility 30 Kilometres

Dongsha Wind southwest force 3
  Visibility 10 Kilometres

Huangmaozhou Wind west-northwest force 1

Macau Wind east force 2
  Visibility 19 Kilometres

Xisha Wind west-southwest force 3
  Visibility 24 Kilometres


WEATHER FORECAST FOR LOCAL AVIATION
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Weather Forecast for Local Aviation

Bulletin issued at 12:30 HKT 11/JUL/2018
(Next update at 17:30 HKT 11/JUL/2018)
I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE SUBSIDING AIR IN THE OUTER CIRCULATION OF
     TROPICAL CYCLONE MARIA BROUGHT GENERALLY FINE
     WEATHER TO GUANGDONG.
     SEVERE TYPHOON MARIA MADE LANDFALL OVER FUJIAN
     AND HAS WEAKENED INTO A TYPHOON. AT NOON, MARIA
     WAS CENTRED ABOUT 26.3 DEGREES NORTH, 119.0
     DEGREES EAST. IT IS FORECAST TO MOVE
     WEST-NORTHWEST AT ABOUT 14 KNOTS ACROSS INLAND
     FUJIAN AND WEAKEN GRADUALLY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1300 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  180/5-10                             35-29
   B.   2000 FT:  180/10                               25
   C.   5000 FT:  050/10                               21
   D.  10000 FT:  080/10                               12
   E.  18000 FT:  060/15                               MS2
   F.  24000 FT:  050/10                               MS11
   G.  30000 FT:  080/20                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT.
   K. VISIBILITY    : 9 KM.
   L. 0 DEG. C LEVEL: 18500 FT      10 DEG. C LEVEL(S) : 12600 FT
   M. TURBULENCE    : NIL
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 26 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHEASTERLY WINDS. CLOUDY PERIODS.=
===================================================================
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 11:48 HKT on 10 Jul 18

VHHK SIGMET 1 VALID 100350/100750 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1742 E11448 - N1642 E11400 - N1930 E11130 - N1948 E11130 - N1948 E11212 - N1742 E11448 TOP FL450 MOV W 07KT NC= VHHK SIGMET 5 VALID 092350/100350 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1736 E11442 - N1642 E11400 - N1848 E11206 - N1900 E11324 - N1736 E11442 TOP FL400 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: <11 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 15:30 HKT 11/Jul/2018


Tropical Cyclone Warning

Typhoon Maria (1808) has weakened into a Severe Tropical Storm with central pressure 980 hectopascals. At 110600 UTC, it was centred within 90 nautical miles of two six point four degrees north (26.4 N) one one eight point three degrees east (118.3 E) and is forecast to move west-northwest at about 14 knots for the next 24 hours.

Maximum winds near the centre are estimated to be 55 knots.

Radius of over 33 knot winds 120 nautical miles.
Radius of over 47 knot winds 60 nautical miles.
Radius of over 2 metre waves 240 nautical miles.

Forecast position and intensity at 120600 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 11/Jul/2018
HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.6 C
Minimum Air Temperature                     26.8 C
Grass Minimum Temperature                   26.4 C
Relative Humidity                        66 - 91 Percent
Rainfall                                     1.3 mm 
Total rainfall since 1st January           697.5 mm
Against an average of                     1199.3 mm

Other Stations                Min                  Max
King's Park                  25.9 C               30.6 C
Wong Chuk Hang               26.9 C               31.3 C
Ta Kwu Ling                  25.7 C               34.7 C
Lau Fau Shan                 23.7 C               33.9 C
Tai Po                       25.7 C               31.4 C
Sha Tin                      26.2 C               32.1 C
Tuen Mun                     26.3 C               32.3 C
Tseung Kwan O                25.4 C               31.4 C
Sai Kung                     25.9 C               31.2 C
Cheung Chau                  26.5 C               30.4 C
Chek Lap Kok                 26.4 C               34.2 C
Tsing Yi                     26.6 C               33.0 C
Shek Kong                    25.5 C               34.0 C
Tsuen Wan Ho Koon            24.9 C               31.3 C
Tsuen Wan Shing Mun Valley   25.7 C               32.1 C
Hong Kong Park               25.5 C               32.4 C
Shau Kei Wan                 26.0 C               30.4 C
Kowloon City                 25.8 C               32.0 C
Happy Valley                 26.8 C               32.9 C
Wong Tai Sin                 26.4 C               30.9 C
Stanley                      26.7 C               31.6 C
Kwun Tong                    25.8 C               30.4 C
Sham Shui Po                 26.7 C               32.1 C
Kai Tak Runway Park          26.7 C               30.2 C
Yuen Long Park               25.5 C               34.5 C
Tai Mei Tuk               26.4 C               32.1 C

Duration of sunshine (King's Park):              8.9 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 10.
 

Yesterday's (10 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 10 Jul
Last revision date: <11 Jul 2018> 

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