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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 11:02 HKT 25/May/2019

At 11 a.m. at the Hong Kong Observatory the air temperature was 27 degrees Celsius and the relative humidity 89 per cent.
During the past hour the mean UV Index recorded at King's Park was 2. The intensity of UV radiation was low.

The air temperatures at other places were:

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


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


Climatological Information for 25 May


Local Weather Forecast
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Local Weather Forecast

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

Current Weather | Regional Temperature Forecast in HK |  9-day Weather Forecast
UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 10:45 HKT 25/May/2019

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

Showers and thunderstorms continue to affect the area to the west of the Pearl River Estuary. Meanwhile, an easterly airstream is affecting the coast of Guangdong.

Weather forecast for today

Mainly cloudy with occasional showers. Isolated thunderstorms in the afternoon. Moderate east to southeasterly winds, occasionally fresh offshore at first.

Outlook : The weather will still be unsettled in the next few days.


(The above forecast period is valid up to 23:59 HKT today, 25/05/2019; 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 25/May/2019

N0 WARNING.

GENERAL SITUATION AT 242100 UTC:
THE SOUTHEASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 250100 UTC:

HONG KONG= E TO SE 5-6, S 4-5 LATER. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL E TO NE UP TO 2 M. TEMP 28-26 C. =
KWANGTUNG= E TO SE 5-6, S 4-5 LATER. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL E TO NE UP TO 2 M. =
TAIWAN STRAIT= E TO NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. =
BASHI= E TO SE 5-6, OCNL 7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL E TO NE 2 M. =
PRATAS= E TO SE 5-6, OCNL 7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL E TO NE 2 M. =
BALINTANG= E TO SE 5-6, OCNL 7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL E TO NE 2 M. =
SCARBOROUGH= S TO SE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
PARACEL= S TO SE 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
TONKIN= S TO SE 4-5, OCNL 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 3 M. =
DANANG= S TO SE 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 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

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 25/May/2019

Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 25 May 2019

Warnings:
Strong winds in Hong Kong adjacent waters, Nan'ao, Shanwei and south of Hong Kong.

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

Area forecasts for the next 24 hours

Hong Kong Adjacent Waters:
East to southeast force 5 to 6, becoming south force 4 to 5 later.
Isolated showers and thunderstorms.
Moderate to rough seas.

Nan'ao, Shanwei and South of Hong Kong:
East to southeast force 5 to 6, becoming south force 4 to 5 later.
Scattered squally showers and thunderstorms.
Moderate to rough seas.

Shangchuan Dao:
South to southeast force 4 to 5.
Scattered squally showers and thunderstorms.
Moderate seas.

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

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

Waglan Island Wind east-northeast force 4
  Visibility 14 Kilometres

Shantou Wind east-northeast force 1
  Visibility 16 Kilometres

Huangmaozhou Wind east force 4

Macau Wind east force 2
  Visibility 7 Kilometres

Xisha Wind southeast force 2
  Visibility 28 Kilometres


WEATHER FORECAST FOR LOCAL AVIATION
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Weather Forecast for Local Aviation

Bulletin issued at 09:30 HKT 25/MAY/2019
(Next update at 12:30 HKT 25/MAY/2019)
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 :
     SHOWERS AND THUNDERSTORMS CONTINUE TO AFFECT THE
     WESTERN PART OF THE VICINITY OF THE PEARL RIVER
     ESTUARY. MEANWHILE, AN EASTERLY AIRSTREAM IS
     AFFECTING THE COAST OF GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  120/10-15
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  120/15-20                            26-30
   B.   2000 FT:  130/20-25, OCNL 30                   22
   C.   5000 FT:  170/15-20                            19
   D.  10000 FT:  210/15                               11
   E.  18000 FT:  210/15                               MS3
   F.  24000 FT:  210/15                               MS13
   G.  30000 FT:  210/15                               MS24
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY WITH OCCASIONAL SHOWERS AND
      ISOLATED THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT SCT 2500 FT. TEMPO FEW CB 800 FT
      SCT 1500 FT BKN 4000 FT.
   K. VISIBILITY    : 7 KM. TEMPO 3000 M IN SHOWERS. TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 10200 FT
   M. TURBULENCE    : MOD TO SEV
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTH TO SOUTHEASTERLY WINDS. MAINLY
     CLOUDY WITH OCCASIONAL SHOWERS AND ISOLATED
     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.

There is no Significant Weather Information (SIGMET)

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: <06 Mar 2019> 

TROPICAL CYCLONE WARNING FOR SHIPPING
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Tropical Cyclone Warning for Shipping

There is no tropical cyclone warning for shipping*.




*Tropical cyclone warnings for shipping are issued by the Hong Kong Observatory for tropical cyclones located within the area bounded by 105E and 125E , 10N and 30N.




For other tropical cyclone related information, please visit the World Meteorological Organization Web Site - Severe Weather Information Centre.


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 25/May/2019
HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     25.8 C
Minimum Air Temperature                     23.8 C
Grass Minimum Temperature                   24.1 C
Relative Humidity                        88 - 97 Percent
Rainfall                                    21.5 mm 
Total rainfall since 1st January           573.7 mm
Against an average of                      557.0 mm

Other Stations                Min                  Max
King's Park                  23.3 C               25.3 C
Wong Chuk Hang               23.9 C               27.2 C
Ta Kwu Ling                  23.9 C               27.6 C
Lau Fau Shan                 23.6 C               28.9 C
Tai Po                       23.4 C               25.1 C
Sha Tin                      23.8 C               25.7 C
Tuen Mun                     24.8 C               27.8 C
Tseung Kwan O                23.6 C               25.2 C
Sai Kung                     24.5 C               25.6 C
Cheung Chau                  23.8 C               28.6 C
Chek Lap Kok                 25.0 C               28.8 C
Tsing Yi                     24.7 C               27.2 C
Shek Kong                    24.4 C               28.6 C
Tsuen Wan Ho Koon            22.9 C               26.7 C
Tsuen Wan Shing Mun Valley   23.9 C               26.3 C
Hong Kong Park               23.6 C               25.9 C
Shau Kei Wan                 23.4 C               25.2 C
Kowloon City                 23.5 C               25.8 C
Happy Valley                 24.3 C               26.2 C
Wong Tai Sin                 24.0 C               27.0 C
Stanley                      23.7 C               25.5 C
Kwun Tong                    23.5 C               25.0 C
Sham Shui Po                 24.0 C               27.1 C
Kai Tak Runway Park          24.2 C               26.1 C
Yuen Long Park               24.8 C               28.9 C
Tai Mei Tuk               23.6 C               24.9 C

Duration of sunshine (King's Park):              0.1 H
The mean UV index recorded at King's Park yesterday was 1,
the UV intensity was Low.
The maximum UV index for yesterday was 4.
 

Yesterday's (24 May 2019) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 to
0.15 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                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.12
Chek Lap Kok                        0.15

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 24 May
Last revision date: <25 May 2019> 

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