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Bulletin issued at 21:02 HKT 31/Mar/2017

At 9 p.m. at the Hong Kong Observatory the air temperature was 16 degrees Celsius and the relative humidity 93 per cent.

Please be reminded that:

The Strong Monsoon Signal has been issued.

The air temperatures at other places were:

King's Park 16 degrees;
Wong Chuk Hang 17 degrees;
Ta Kwu Ling 17 degrees;
Lau Fau Shan 16 degrees;
Tai Po 17 degrees;
Sha Tin 17 degrees;
Tuen Mun 17 degrees;
Tseung Kwan O 15 degrees;
Sai Kung 16 degrees;
Cheung Chau 16 degrees;
Chek Lap Kok 18 degrees;
Tsing Yi 17 degrees;
Shek Kong 17 degrees;
Tsuen Wan Ho Koon 15 degrees;
Tsuen Wan Shing Mun Valley 17 degrees;
Hong Kong Park 16 degrees;
Shau Kei Wan 16 degrees;
Kowloon City 16 degrees;
Happy Valley 17 degrees;
Wong Tai Sin 16 degrees;
Stanley 17 degrees;
Kwun Tong 15 degrees;
Sham Shui Po 17 degrees;
Kai Tak Runway Park 17 degrees;
Yuen Long Park 17 degrees;
Tai Mei Tuk 16 degrees.

Between 7:45 and 8:45 p.m., the rainfall recorded in various regions were:

Islands District 0 to 2 mm;
Sai Kung 0 to 2 mm;
Wong Tai Sin 1 to 2 mm;
Yau Tsim Mong 1 to 2 mm;
Sham Shui Po 0 to 1 mm;
Central & Western District 0 to 1 mm;
Southern District 0 to 1 mm;
Kowloon City 0 to 1 mm;
Tai Po 0 to 1 mm;
Kwun Tong 0 to 1 mm.


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


Climatological Information for 31 Mar

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 20:45 HKT 31/Mar/2017

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

The northeast monsoon associated with a cold front is bringing cooler weather to the coast of Guangdong. Locally, temperatures over many places in the evening were five to six degrees lower than those of yesterday.

Weather forecast for tonight and tomorrow

Cloudy with a few rain patches overnight. Cool tomorrow morning with a minimum temperature of about 15 degrees. Fine and dry during the day. The maximum temperature will be about 21 degrees. Moderate to fresh northerly winds, strong offshore and on high ground at first.

Outlook : Mainly fine with cool morning in the following couple of days. Sunny periods on Ching Ming Festival.


(The above forecast period is valid up to 23:59 HKT tomorrow, 01/04/2017; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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MARINE FORECAST
Traditional Chinese Simplified Chinese

Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 21:00 HKT 31/Mar/2017

GALE WARNING AREAS: TAIWAN STRAIT, BASHI, BALINTANG AND SCARBOROUGH.

GENERAL SITUATION AT 310900 UTC:
COLD FRONT 19N 109E 23N 120E 23N 125E S 10KT.

MARINE FORECAST FOR 24 HOURS FROM 311300 UTC:

HONG KONG= N TO NE 5-6, OCNL 7. ISOL SHOWERS AND SQUALLY TS. SEA UP TO 4 M. SWELL NE UP TO 2 M LATER. TEMP 15-21 C. =
KWANGTUNG= N TO NE 6-7. ISOL SHOWERS AND SQUALLY TS. SEA 3-4 M. SWELL NE UP TO 2 M. =
TAIWAN STRAIT= NE 7-8. ISOL SHOWERS AND SQUALLY TS. SEA 4-6 M. SWELL N 2 M, 3 M LATER. =
BASHI= N TO NE 7, BEC 8. ISOL SHOWERS AND SQUALLY TS. SEA 4 M, BEC 6 M. SWELL NE 2 M, 3 M LATER. =
PRATAS= N TO NE 6-7. ISOL SHOWERS AND SQUALLY TS. SEA 3-4 M. SWELL NE UP TO 2 M. =
BALINTANG= N TO NE 6-7, 8 LATER. ISOL SHOWERS. SEA 3-4 M, 6 M LATER. SWELL NE 2 M. =
SCARBOROUGH= N TO NE 4-5, 7-8 LATER. ISOL SHOWERS LATER. SEA 2 M, 4-6 M LATER. SWELL NE UP TO 2 M. =
PARACEL= N TO NE 6-7. ISOL SHOWERS AND SQUALLY TS. SEA 3-4 M. =
TONKIN= N TO NE 6-7. ISOL SHOWERS AND SQUALLY TS. SEA 3-4 M. =
DANANG= N TO NE 6-7. ISOL SHOWERS AND SQUALLY TS. SEA 3-4 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 19:30 HKT 31/Mar/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 7:30 p.m. on 31 March 2017

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    The northeast monsoon associated with a cold front is affecting the coastal waters of Guangdong.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North to northeast force 5 to 6, occasionally force 7.
    Isolated showers and squally thunderstorms.
    Moderate to rough seas.

    Nan'ao and Shanwei:
    North to northeast force 6 to 7.
    Isolated showers and squally thunderstorms.
    Rough seas.

    South of Hong Kong and Shangchuan Dao:
    North to northeast force 5 to 6, occasionally force 7.
    Isolated showers and squally thunderstorms.
    Moderate to rough seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 6 to 7.

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

    Waglan Island Wind north force 4
      Visibility 48 Kilometres

    Shantou Wind south-southwest force 1
      Visibility 30 Kilometres

    Dongsha Wind north-northwest force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind northwest force 7

    Macau Wind north force 2
      Visibility 2500 Metres in mist

    Xisha Wind south-southwest force 2
      Visibility 28 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
    Traditional Chinese Simplified Chinese

    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 31/MAR/2017
    (Next update at 01:30 HKT 01/APR/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 :
     THE NORTHEAST MONSOON ASSOCIATED WITH A COLD
     FRONT IS AFFECTING THE COASTAL AREAS OF
     GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  360/15-20, OCNL 25
                  TEMPO VRB/25G35 IN TS AT FIRST
       OFFSHORE:  330/20-25, OCNL G35                  19-15
   B.   2000 FT:  340/15-20, OCNL 25                   16
   C.   5000 FT:  300/25                               14
   D.  10000 FT:  270/35                               7
   E.  18000 FT:  270/45                               MS8
   F.  24000 FT:  240/50                               MS19
   G.  30000 FT:  240/70                               MS33
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      CLOUDY WITH OCCASIONAL RAIN AND ISOLATED
      SQUALLY THUNDERSTORMS. LOCALIZED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT SCT 2000 FT TEMPO FEW 800 FT CB SCT
      1500FT.
   K. VISIBILITY    : 7 KM. TEMPO 2000 M IN RAIN/MIST. TEMPO 1500 M IN TS
   L. 0 DEG. C LEVEL: 14000 FT      10 DEG. C LEVEL(S) : 9200 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS, OFFSHORE AND NEAR HILLS
   N. SEA STATE     : 3.0-4.0 M     SEA TEMPERATURE    : 20 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTHERLY WINDS, OCCASIONALLY
     STRONG OFFSHORE. MAINLY FINE.=

    ===================================================================
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 19:25 HKT on 31 Mar 17

    VHHK SIGMET 2 VALID 310725/311125 VHHH- VHHK HONG KONG FIR EMBD TS FCST N OF LINE N2212 E11730 - N2012 E11130 TOP FL320 MOV ESE 10KT NC= VHHK SIGMET 3 VALID 311125/311525 VHHH- VHHK HONG KONG FIR EMBD TS FCST NW OF LINE N2200 E11730 - N1906 E11200 TOP FL330 MOV ESE 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 31/Mar/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     23.1 C
Minimum Air Temperature                     21.0 C
Grass Minimum Temperature                   20.9 C
Relative Humidity                        81 - 94 Percent
Rainfall                                      Trace 
Total rainfall since 1st January            53.8 mm
Against an average of                      159.6 mm

Other Stations                Min                  Max
King's Park                  20.6 C               24.1 C
Wong Chuk Hang               21.3 C               24.8 C
Ta Kwu Ling                  20.8 C               24.9 C
Lau Fau Shan                 20.9 C               27.1 C
Tai Po                       20.8 C               22.5 C
Sha Tin                      21.0 C               23.1 C
Tuen Mun                     22.0 C               25.2 C
Tseung Kwan O                20.2 C               21.8 C
Sai Kung                     20.7 C               22.0 C
Cheung Chau                  20.9 C               23.5 C
Chek Lap Kok                 21.8 C               27.2 C
Tsing Yi                     22.2 C               24.7 C
Shek Kong                    21.6 C               25.8 C
Tsuen Wan Ho Koon            21.0 C               24.0 C
Tsuen Wan Shing Mun Valley   21.6 C               24.6 C
Hong Kong Park               20.9 C               23.8 C
Shau Kei Wan                 19.7 C               21.2 C
Kowloon City                 20.9 C               24.0 C
Happy Valley                 21.1 C               25.6 C
Wong Tai Sin                 21.2 C               25.3 C
Stanley                      20.3 C               22.1 C
Kwun Tong                    20.5 C               23.0 C
Sham Shui Po                 21.8 C               25.1 C
Kai Tak Runway Park          21.0 C               22.5 C
Yuen Long Park               21.9 C               27.8 C
Tai Mei Tuk               20.3 C               22.5 C

Duration of sunshine (King's Park):              0.4 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.
Sea surface temperature (Waglan Island):        19.1 C 

Yesterday's (30 Mar 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                             0.09
Kat O                               0.10
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                        0.14

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 30 Mar
     2003copy right image | Important notices | Privacy policy Last revision date: <31 Mar 2017> 

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