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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 10:02 HKT 20/Jan/2019

At 10 a.m. at the Hong Kong Observatory the air temperature was 21 degrees Celsius and the relative humidity 75 per cent.
During the past hour the mean UV Index recorded at King's Park was 1. The intensity of UV radiation was low.

Please be reminded that:

The Fire Danger Warning is Yellow and the fire risk is high.

The air temperatures at other places were:

King's Park 21 degrees;
Wong Chuk Hang 22 degrees;
Ta Kwu Ling 20 degrees;
Lau Fau Shan 20 degrees;
Tai Po 20 degrees;
Sha Tin 21 degrees;
Tuen Mun 20 degrees;
Tseung Kwan O 20 degrees;
Sai Kung 21 degrees;
Cheung Chau 21 degrees;
Chek Lap Kok 21 degrees;
Tsing Yi 22 degrees;
Shek Kong 21 degrees;
Tsuen Wan Ho Koon 19 degrees;
Tsuen Wan Shing Mun Valley 21 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;
Kai Tak Runway Park 21 degrees;
Yuen Long Park 21 degrees;
Tai Mei Tuk 20 degrees.


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


Climatological Information for 20 Jan


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 09:45 HKT 20/Jan/2019

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

Pressure is rising over the northern part of southern China. The northeast monsoon is expected to reach the south China coast overnight. Temperatures will fall significantly over the region.

Weather forecast for today

Mainly cloudy with sunny intervals. One or two light rain patches tonight. Moderate east to northeasterly winds, occasionally fresh offshore later.

Outlook : Temperatures falling significantly tomorrow and on Tuesday. Fine and dry in the middle and latter parts of this week.


(The above forecast period is valid up to 23:59 HKT today, 20/01/2019; 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 20/Jan/2019

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

GENERAL SITUATION AT 192100 UTC:
AN INTENSE NORTHEAST MONSOON IS EXPECTED TO AFFECT THE FORECAST AREAS GRADUALLY OVERNIGHT.

MARINE FORECAST FOR 24 HOURS FROM 200100 UTC:

HONG KONG= E TO NE 5-6, N 6 LATER. LGT RAIN PATCHES TONIGHT. SEA 2-3 M. SWELL E TO NE UP TO 2 M. TEMP 23-16 C. =
KWANGTUNG= E TO NE 6-7, N 7-8 LATER. DOWN TO 4000 M IN MIST OR RAIN PATCHES AT FIRST. SEA 3-4 M, 4-6 M LATER. SWELL E TO NE 2 M. =
TAIWAN STRAIT= NE 4-5, BEC N 7-8. DOWN TO 4000 M IN MIST OR RAIN PATCHES AT FIRST. SEA 2 M, BEC 4-6 M. SWELL N TO NE 2 M. =
BASHI= E TO NE 6-7, N 7-8 LATER. RAIN PATCHES. SEA 3-4 M, 4-6 M LATER. SWELL E TO NE 2-3 M. =
PRATAS= E TO NE 6-7, N 7-8 LATER. RAIN PATCHES. SEA 3-4 M, 4-6 M LATER. SWELL E TO NE 2-3 M. =
BALINTANG= E TO NE 6-7, N 7-8 LATER. RAIN PATCHES. SEA 3-4 M, 4-6 M LATER. SWELL E TO NE 2-3 M. =
SCARBOROUGH= E TO NE 6-7. LGT RAIN PATCHES. SEA 3-4 M. SWELL E TO NE 2-3 M. =
PARACEL= E TO NE 5-6, N 6-7 LATER. RAIN PATCHES. SEA 2-3 M, 3-4 M LATER. SWELL E TO NE 2-3 M. =
TONKIN= E 4-5, BEC N 6-7. DOWN TO 2000 M IN MIST OR RAIN PATCHES AT FIRST. SEA 2 M, 3-4 M LATER. =
DANANG= E TO NE 5-6. LGT RAIN PATCHES. SEA 2-3 M. SWELL E TO NE 2-3 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 20/Jan/2019

Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 20 January 2019

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

Weather Situation:
Pressure is rising over the northern part of southern China. The northeast monsoon is expected to reach the south China coastal waters overnight.

Area forecasts for the next 24 hours

Hong Kong Adjacent Waters:
East to northeast force 5 to 6, becoming north force 6 later.
A few light rain patches tonight.
Moderate to rough seas.

Nan'ao and Shanwei:
East to northeast force 6 to 7, becoming north force 7 to 8 later.
Rough to very rough seas.

South of Hong Kong and Shangchuan Dao:
East to northeast force 5 to 6, becoming north force 6 to 7 later.
Moderate to rough seas.

Outlook for the next 48 hours
Northerly winds of force 7 to 8, becoming east to northeasterly winds of force 6 to 7 later.

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

Waglan Island Wind north-northeast force 3
  Visibility 19 Kilometres

Shantou Wind west force 1
  Visibility 8 Kilometres

Dongsha Wind northeast force 3
  Visibility 10 Kilometres

Huangmaozhou Wind northeast force 4

Macau Wind north-northwest force 2
  Visibility 6 Kilometres

Xisha Wind east-northeast force 1
  Visibility 23 Kilometres


WEATHER FORECAST FOR LOCAL AVIATION
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Weather Forecast for Local Aviation

Bulletin issued at 09:00 HKT 20/JAN/2019
(Next update at 12:30 HKT 20/JAN/2019)
I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS. MEANWHILE, PRESSURE IS
     RISING OVER THE NORTHERN PART OF SOUTHERN CHINA.
     THE NORTHEAST MONSOON IS EXPECTED TO REACH THE
     SOUTH CHINA COASTAL AREAS OVERNIGHT.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  040/5-10
       OFFSHORE:  050/10-15 OCNL 20                    18-23
   B.   2000 FT:  040/10-15 OCNL 20                    16
   C.   5000 FT:  160/10                               11
   D.  10000 FT:  240/25                               4
   E.  18000 FT:  220/50                               MS5
   F.  24000 FT:  230/60                               MS16
   G.  30000 FT:  240/70                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH SUNNY INTERVALS. ONE OR TWO
      LIGHT RAIN PATCHES. LOCALISED MIST/HAZE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT SCT 4000 FT
   K. VISIBILITY    : 7 KM. TEMPO 3000 M IN RAIN/MIST/HAZE.
   L. 0 DEG. C LEVEL: 15000 FT      10 DEG. C LEVEL(S) : 6400 FT
   M. TURBULENCE    : MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.0-2.5 M     SEA TEMPERATURE    : 18 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE NORTH TO NORTHEASTERLY WINDS,
     OCCASIONALLY FRESH OFFSHORE. MAINLY CLOUDY WITH
     ONE OR TWO LIGHT 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.


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: <09 Jan 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 20/Jan/2019
HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     21.9 C
Minimum Air Temperature                     17.1 C
Grass Minimum Temperature                   15.2 C
Relative Humidity                        60 - 91 Percent
Rainfall                                     0.2 mm 
Total rainfall since 1st January             4.6 mm
Against an average of                       14.1 mm

Other Stations                Min                  Max
King's Park                  16.1 C               22.3 C
Wong Chuk Hang               16.6 C               22.5 C
Ta Kwu Ling                  15.3 C               24.7 C
Lau Fau Shan                 14.4 C               21.4 C
Tai Po                       16.0 C               21.7 C
Sha Tin                      16.6 C               22.4 C
Tuen Mun                     15.6 C               23.6 C
Tseung Kwan O                16.3 C               21.6 C
Sai Kung                     16.7 C               21.5 C
Cheung Chau                  15.2 C               21.5 C
Chek Lap Kok                 17.3 C               22.9 C
Tsing Yi                     17.2 C               23.0 C
Shek Kong                    14.9 C               24.1 C
Tsuen Wan Ho Koon            14.1 C               22.9 C
Tsuen Wan Shing Mun Valley   16.4 C               23.7 C
Hong Kong Park               16.5 C               22.0 C
Shau Kei Wan                 16.1 C               20.9 C
Kowloon City                 15.9 C               23.2 C
Happy Valley                 16.8 C               22.3 C
Wong Tai Sin                 16.8 C               23.6 C
Stanley                      16.4 C               20.4 C
Kwun Tong                    16.2 C               21.9 C
Kai Tak Runway Park          17.0 C               21.5 C
Yuen Long Park               14.1 C               24.1 C
Tai Mei Tuk               15.6 C               24.0 C

Duration of sunshine (King's Park):              1.7 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 5.
 

Yesterday's (19 Jan 2019) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 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                           0.09
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                           0.13
Sai Wan Ho                          0.09
King's Park                         0.15
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 19 Jan
Last revision date: <20 Jan 2019> 

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