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Bulletin issued at 12:02 HKT 31/Mar/2019

At noon at the Hong Kong Observatory the air temperature was 21 degrees Celsius and the relative humidity 80 per cent.
During the past hour the mean UV Index recorded at King's Park was 2. The intensity of UV radiation was low.

Please be reminded that:

The Strong Monsoon Signal has been issued.

The air temperatures at other places were:

King's Park 21 degrees;
Wong Chuk Hang 22 degrees;
Ta Kwu Ling 24 degrees;
Lau Fau Shan 26 degrees;
Tai Po 21 degrees;
Sha Tin 22 degrees;
Tuen Mun 24 degrees;
Tseung Kwan O 21 degrees;
Sai Kung 21 degrees;
Cheung Chau 21 degrees;
Chek Lap Kok 24 degrees;
Tsing Yi 23 degrees;
Shek Kong 24 degrees;
Tsuen Wan Ho Koon 23 degrees;
Tsuen Wan Shing Mun Valley 22 degrees;
Hong Kong Park 21 degrees;
Shau Kei Wan 21 degrees;
Kowloon City 21 degrees;
Happy Valley 22 degrees;
Wong Tai Sin 22 degrees;
Stanley 21 degrees;
Kwun Tong 21 degrees;
Sham Shui Po 23 degrees;
Kai Tak Runway Park 21 degrees;
Yuen Long Park 25 degrees;
Tai Mei Tuk 21 degrees.

No rainfall was recorded at the Hong Kong Observatory between midnight last night and midday today.


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


Climatological Information for 31 Mar

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 11:45 HKT 31/Mar/2019

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

A strong northeast monsoon is affecting the coast of Guangdong. Meanwhile, showers are affecting the vicinity of the Pearl River Estuary.

Weather forecast for this afternoon and tonight

Mainly cloudy with a few showers. Showers will be more frequent in some areas in the afternoon. Fresh easterly winds, strong offshore and on high ground.

Outlook : Windy and slightly cooler with a few rain patches tomorrow. Temperatures will rise gradually midweek this week.


(The above forecast period is valid up to 23:59 HKT today, 31/03/2019; 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 31/Mar/2019

GALE WARNING AREAS: HONG KONG, KWANGTUNG, TAIWAN STRAIT, BASHI, PRATAS, BALINTANG AND SCARBOROUGH.

GENERAL SITUATION AT 302100 UTC:
AN INTENSE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 310100 UTC:

HONG KONG= E 6-7, OCNL 8. A FEW RAIN PATCHES. SEA UP TO 6 M. TEMP 23-18 C. =
KWANGTUNG= E TO NE 7-8. ISOL SHOWERS AND TS. SEA 4-6 M. SWELL NE 2-3 M. =
TAIWAN STRAIT= NE 7-8. CLD. SEA 4-6 M. SWELL NE 2-3 M. =
BASHI= E TO NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 2-3 M. =
PRATAS= E TO NE 7-8. ISOL SHOWERS AND TS. SEA 4-6 M. SWELL NE 2-3 M. =
BALINTANG= E TO NE 7-8. ISOL SHOWERS. SEA 4-6 M. SWELL NE 2-3 M. =
SCARBOROUGH= E TO NE 7-8. ISOL SHOWERS. SEA 4-6 M. SWELL NE 2-3 M. =
PARACEL= E TO SE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL NE 2 M. =
TONKIN= E TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= E TO SE 4-5. ISOL 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.


  • 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 12:30 HKT 31/Mar/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 31 March 2019

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

    Weather Situation:
    An intense northeast monsoon is affecting the coastal waters of Guangdong.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 6 to 7, occasionally force 8.
    A few showers.
    Rough to very rough seas.

    Nan'ao and Shanwei:
    East to northeast force 7 to 8.
    Rough to very rough seas.

    South of Hong Kong:
    East force 6 to 7, occasionally force 8.
    Isolated showers and thunderstorms.
    Rough to very rough seas.

    Shangchuan Dao:
    East to southeast force 5 to 6, occasionally force 7.
    Isolated showers and thunderstorms.
    Moderate to rough seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 7 to 8. Isolated showers and thunderstorms.

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

    Waglan Island Wind east-northeast force 7
      Visibility 11 Kilometres

    Shantou Wind east force 2
      Visibility 20 Kilometres

    Dongsha Wind east-northeast force 2
      Visibility 9 Kilometres

    Huangmaozhou Wind east force 7

    Macau Wind east force 3
      Visibility 9 Kilometres

    Xisha Wind south-southwest force 2
      Visibility 30 Kilometres

  • Explanation of Seas or Sea Waves
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 12:30 HKT 31/MAR/2019
    (Next update at 17:30 HKT 31/MAR/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     GALE FORCE WINDS.  SEV TURB.
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A STRONG NORTHEAST MONSOON IS AFFECTING THE
     COAST OF GUANGDONG.  MEANWHILE, SHOWERS ARE
     AFFECTING THE VICINITY OF THE PEARL RIVER
     ESTUARY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1300 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  100/15-20, OCNL 25
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  080/25-30, OCNL 35                   26-20
   B.   2000 FT:  110/25-30, OCNL 35                   18
   C.   5000 FT:  180/15                               16
   D.  10000 FT:  260/20                               7
   E.  18000 FT:  260/30                               MS5
   F.  24000 FT:  260/40                               MS18
   G.  30000 FT:  260/60                               MS31
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2100-2500, 2600-3100 FT.
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS.  ISOLATED
      THUNDERSTORMS OVER THE SEAS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 3000 FT.  TEMPO FEW CB 800 FT
      SCT 2000 FT  BKN 4000 FT.
   K. VISIBILITY    : 9 KM.  TEMPO 4000 M IN SHOWERS.
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 16000 FT      10 DEG. C LEVEL(S) : 8200 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 3.5-5.0 M     SEA TEMPERATURE    : 22 DEG
IV.  FURTHER OUTLOOK: 
     FRESH TO STRONG EASTERLY WINDS.  MAINLY CLOUDY
     WITH A FEW RAIN PATCHES.=

    ===================================================================
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.

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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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    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/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     24.0 C
Minimum Air Temperature                     22.5 C
Grass Minimum Temperature                   21.4 C
Relative Humidity                        79 - 92 Percent
Rainfall                                      Trace 
Total rainfall since 1st January           252.2 mm
Against an average of                      159.6 mm

Other Stations                Min                  Max
King's Park                  21.9 C               23.8 C
Wong Chuk Hang               21.5 C               24.7 C
Ta Kwu Ling                  21.6 C               25.2 C
Lau Fau Shan                 21.3 C               26.7 C
Tai Po                       21.2 C               22.6 C
Sha Tin                      21.8 C               23.1 C
Tuen Mun                     22.2 C               24.4 C
Tseung Kwan O                20.9 C               22.2 C
Sai Kung                     21.9 C               23.0 C
Cheung Chau                  21.5 C               23.1 C
Chek Lap Kok                 22.9 C               25.9 C
Tsing Yi                     22.0 C               24.3 C
Shek Kong                    21.3 C               25.7 C
Tsuen Wan Ho Koon            20.5 C               23.7 C
Tsuen Wan Shing Mun Valley   21.3 C               23.9 C
Hong Kong Park               21.9 C               23.9 C
Shau Kei Wan                 21.4 C               23.4 C
Kowloon City                 21.9 C               23.7 C
Happy Valley                 21.6 C               24.4 C
Wong Tai Sin                 22.1 C               24.2 C
Stanley                      21.7 C               23.2 C
Kwun Tong                    21.5 C               23.4 C
Sham Shui Po                 22.5 C               24.3 C
Kai Tak Runway Park          22.2 C               23.5 C
Yuen Long Park               21.6 C               25.9 C
Tai Mei Tuk               21.1 C               23.4 C

Duration of sunshine (King's Park):              0.6 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.
 

Yesterday's (30 Mar 2019) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 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                             0.09
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 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 30 Mar
     2003copy right image | Important notices | Privacy policy Last revision date: <31 Mar 2019> 

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