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Bulletin issued at 11:02 HKT 25/Feb/2018

At 11 a.m. at the Hong Kong Observatory the air temperature was 22 degrees Celsius and the relative humidity 76 per cent.
During the past hour the mean UV Index recorded at King's Park was 4. The intensity of UV radiation was moderate.

The air temperatures at other places were:

King's Park 23 degrees;
Wong Chuk Hang 22 degrees;
Ta Kwu Ling 23 degrees;
Lau Fau Shan 21 degrees;
Tai Po 22 degrees;
Sha Tin 22 degrees;
Tuen Mun 23 degrees;
Tseung Kwan O 23 degrees;
Sai Kung 21 degrees;
Cheung Chau 23 degrees;
Chek Lap Kok 22 degrees;
Tsing Yi 23 degrees;
Shek Kong 23 degrees;
Tsuen Wan Ho Koon 23 degrees;
Tsuen Wan Shing Mun Valley 25 degrees;
Hong Kong Park 23 degrees;
Shau Kei Wan 23 degrees;
Kowloon City 25 degrees;
Happy Valley 24 degrees;
Wong Tai Sin 24 degrees;
Stanley 21 degrees;
Kwun Tong 23 degrees;
Sham Shui Po 24 degrees;
Kai Tak Runway Park 23 degrees;
Yuen Long Park 23 degrees;
Tai Mei Tuk 21 degrees.


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


Climatological Information for 25 Feb

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 10:45 HKT 25/Feb/2018

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

Pressure over northern Guangdong is rising. A weak replenishment of the northeast monsoon is expected to reach the coast of Guangdong later today.

Weather forecast for today

Mainly cloudy with sunny intervals. Visibility relatively low in some areas. One or two rain patches later. Light winds, becoming moderate northerlies later.

Outlook : Sunny periods in the next couple of days.


(The above forecast period is valid up to 23:59 HKT today, 25/02/2018; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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MARINE FORECAST
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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 09:00 HKT 25/Feb/2018

GALE WARNING AREA: TAIWAN STRAIT.

GENERAL SITUATION AT 242100 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 250100 UTC:

HONG KONG= N TO NE 4-5, OCNL 6. DOWN TO 2000 M IN MIST OR RAIN PATCHES. SEA UP TO 3 M. SWELL NE UP TO 2 M. TEMP 23-16 C. =
KWANGTUNG= N TO NE 5-6, UP TO 7 IN E LATER. DOWN TO 2000 M IN MIST OR RAIN PATCHES. SEA 2-3 M, UP TO 4 M LATER. SWELL NE 2 M. =
TAIWAN STRAIT= N TO NE 5-6, BEC 7-8. DOWN TO 2000 M IN MIST OR RAIN PATCHES. SEA 2-3 M, BEC 4-6 M. SWELL NE 2 M. =
BASHI= N TO NE 5-6, OCNL 7. RAIN PATCHES. SEA UP TO 4 M. SWELL NE 2 M. =
PRATAS= N TO NE 5-6, 7 LATER. RAIN PATCHES. SEA 2-3 M. SWELL NE 2 M. =
BALINTANG= N TO NE 5-6, OCNL 7. ISOL SHOWERS AND TS LATER. SEA UP TO 4 M. SWELL NE 2 M. =
SCARBOROUGH= N TO NE 5-6, 7 LATER. ISOL SHOWERS LATER. SEA 2-3 M, 4 M LATER. SWELL NE 2 M. =
PARACEL= N TO NE 4-5, OCNL 6. DOWN TO 2000 M IN MIST OR RAIN PATCHES IN N. SEA UP TO 3 M. SWELL NE 2 M. =
TONKIN= N TO NE 5-6. DOWN TO 2000 M IN MIST OR RAIN PATCHES. SEA 2-3 M. SWELL NE UP TO 2 M. =
DANANG= N TO NE 4-5, OCNL 6. DOWN TO 2000 M IN MIST OR RAIN PATCHES. SEA UP TO 3 M. SWELL NE 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.


  • Map showing the 10 forecast areas
  • Tidal Information

    • 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/Feb/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 25 February 2018

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    The northeast monsoon is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North to northeast force 4 to 5, occasionally force 6.
    A few rain patches. Mist patches.
    Moderate to rough seas.

    Nan'ao and Shanwei:
    North to northeast force 5 to 6, becoming force 7 later.
    Moderate to rough seas.

    South of Hong Kong and Shangchuan Dao:
    North to northeast force 5 to 6.
    Moderate to rough seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 6, becoming southeasterly winds of force 4 to 5 later.

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

    Waglan Island Wind north force 2
      Visibility 8 Kilometres

    Shantou Wind calm
      Visibility 4900 Metres in mist

    Dongsha Wind north-northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind north force 3

    Macau Wind north force 1
      Visibility 3000 Metres in mist

    Xisha Wind east-northeast force 1
      Visibility 17 Kilometres

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
  • Descriptive Terms of Wind Speeds
  • Visibility Readings in Hong Kong Waters
  • Map showing forecast areas
  • Tidal Information

    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 09:00 HKT 25/FEB/2018
    (Next update at 17:30 HKT 25/FEB/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     PRESSURE OVER SOUTHERN CHINA IS RISING.  A WEAK
     REPLENISHMENT OF THE NORTHEAST MONSOON IS
     EXPECTED TO REACH THE COAST OF GUANGDONG LATER
     TODAY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  VRB/5 BEC 360/10
       OFFSHORE:  360/10 BEC 360/15-20                 19-24
   B.   2000 FT:  330/10 BEC 020/15-20                 16
   C.   5000 FT:  260/10                               13
   D.  10000 FT:  270/20                               5
   E.  18000 FT:  270/40                               MS8
   F.  24000 FT:  260/60                               MS20
   G.  30000 FT:  260/85                               MS29
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW RAIN PATCHES AT FIRST.
      SUNNY INTERVALS IN THE AFTERNOON.  LOCALIZED
      MIST/HAZE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT  SCT 4000 FT.
   K. VISIBILITY    : 7 KM.  TEMPO 2500 M IN RAIN/MIST/HAZE.
   L. 0 DEG. C LEVEL: 12500 FT      10 DEG. C LEVEL(S) : 6600 FT
   M. TURBULENCE    : MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.0 BEC 2.0 M   SEA TEMPERATURE    : 17 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTH TO NORTHEASTERLY WINDS.
     MAINLY CLOUDY.=

    ===================================================================
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 15:35 HKT on 22 Feb 18

    VHHK SIGMET 1 VALID 220735/221135 VHHH- VHHK HONG KONG FIR SEV ICE FCST N OF N2030 AND E OF E11300 FL130/210 MOV E 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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    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/Feb/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     20.8 C
Minimum Air Temperature                     15.5 C
Grass Minimum Temperature                   14.7 C
Relative Humidity                        64 - 80 Percent
Rainfall                                     0.2 mm 
Total rainfall since 1st January            66.7 mm
Against an average of                       71.1 mm

Other Stations                Min                  Max
King's Park                  15.1 C               21.8 C
Wong Chuk Hang               15.7 C               22.3 C
Ta Kwu Ling                  14.9 C               22.2 C
Lau Fau Shan                 14.2 C               20.3 C
Tai Po                       15.3 C               19.9 C
Sha Tin                      15.5 C               21.0 C
Tuen Mun                     15.0 C               21.8 C
Tseung Kwan O                14.3 C               19.9 C
Sai Kung                     15.0 C               20.0 C
Cheung Chau                  14.3 C               22.3 C
Chek Lap Kok                 16.0 C               21.6 C
Tsing Yi                     15.9 C               22.6 C
Shek Kong                    15.2 C               23.4 C
Tsuen Wan Ho Koon            13.9 C               21.9 C
Tsuen Wan Shing Mun Valley   15.6 C               23.1 C
Hong Kong Park               15.0 C               21.6 C
Shau Kei Wan                 14.9 C               20.2 C
Kowloon City                 14.9 C               22.8 C
Happy Valley                 15.7 C               22.5 C
Wong Tai Sin                 15.5 C               22.8 C
Stanley                      15.0 C               21.1 C
Kwun Tong                    14.7 C               21.8 C
Sham Shui Po                 15.8 C               22.7 C
Kai Tak Runway Park          15.9 C               20.9 C
Yuen Long Park               14.8 C               23.5 C
Tai Mei Tuk               14.4 C               22.4 C

Duration of sunshine (King's Park):              2.8 H
The mean UV index recorded at King's Park yesterday was 3,
the UV intensity was Moderate.
The maximum UV index for yesterday was 8.
Sea surface temperature (Waglan Island):        16.2 C 

Yesterday's (24 Feb 2018) 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                             0.09
Kat O                               0.11
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.12
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                      0.13
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 Feb
     2003copy right image | Important notices | Privacy policy Last revision date: <25 Feb 2018> 

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