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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 22:02 HKT 21/Apr/2017

At 10 p.m. at the Hong Kong Observatory the air temperature was 24 degrees Celsius and the relative humidity 88 per cent.

The air temperatures at other places were:

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


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


Climatological Information for 21 Apr


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 21:45 HKT 21/Apr/2017

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

Showers are affecting the coastal areas of Guangdong. Meanwhile, the northeast monsoon associated with a cold front is affecting the region gradually.

Weather forecast for tonight and tomorrow

Mainly cloudy. There will be a few showers at first. Cooler tomorrow morning with a minimum temperature of about 19 degrees. Bright periods during the day with a maximum temperature of around 24 degrees. Moderate to fresh northerly winds.

Outlook : Mainly cloudy in the following couple of days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 22/04/2017; 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 21:00 HKT 21/Apr/2017

N0 WARNING.

GENERAL SITUATION AT 210900 UTC:
A SOUTHERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS. IT WILL GRADUALLY BE REPLACED BY A NORTHEAST MONSOON.

MARINE FORECAST FOR 24 HOURS FROM 211300 UTC:

HONG KONG= S 4-5, BEC N UP TO 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M, BEC 3 M. TEMP 19-24 C. =
KWANGTUNG= S TO SW 4-5, BEC N 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M, BEC 3 M. =
TAIWAN STRAIT= NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M, 4 M LATER. SWELL NE UP TO 3M. =
BASHI= W TO SW 5-6 , N 6 LATER. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS LATER. SEA 2-3 M. =
PRATAS= S TO SW 4-5, N 6 LATER. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS LATER. SEA 2 M, 3 M LATER. =
BALINTANG= SW 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
SCARBOROUGH= S TO SW 4-5. ISOL SHOWERS LATER. SEA UP TO 2 M. =
PARACEL= S 5-6, NW 6 IN N LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. =
TONKIN= NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M, 4 M LATER. =
DANANG= S 5-6, N 6 IN N LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 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 22:20 HKT 21/Apr/2017

Weather information for south China coastal waters issued by the Hong Kong Observatory at 10:20 p.m. on 21 April 2017

Warnings:
Strong winds in all areas.

Weather Situation:
Showers are affecting the coastal waters of Guangdong. Meanwhile, A cold front associated with the northeast monsoon is affecting the coastal waters gradually.

Area forecasts for the next 24 hours

Hong Kong Adjacent Waters:
South force 5 to 6, becoming north up to force 6.
Isolated squally showers and thunderstorms.
Moderate to rough seas.

Nan'ao and Shanwei:
Southwest force 5 to 6, becoming north force 6.
Scattered squally showers and thunderstorms.
Moderate to rough seas.

South of Hong Kong:
South to southwest force 5 to 6, becoming north force 6.
Isolated squally showers and thunderstorms.
Moderate to rough seas.

Shangchuan Dao:
South force 5 to 6, becoming north force 6.
Isolated squally showers and thunderstorms.
Moderate to rough seas.

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

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

Waglan Island Wind north force 3
  Visibility 9 Kilometres

Shantou Wind east-southeast force 1
  Visibility 11 Kilometres in showers

Dongsha Wind southwest force 3
  Visibility 10 Kilometres

Huangmaozhou Wind northwest force 4

Macau Wind north-northwest force 2
  Visibility 3900 Metres in rain

Xisha Wind south-southwest force 3
  Visibility 17 Kilometres


WEATHER FORECAST FOR LOCAL AVIATION
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Weather Forecast for Local Aviation

Bulletin issued at 17:30 HKT 21/APR/2017
(Next update at 01:30 HKT 22/APR/2017)
I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS AT FIRST.
     STRONG WINDS AND SEV TURB LATER.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A BAND OF THUNDERY SHOWERS IS AFFECTING THE
     COASTAL AREAS OF GUANGDONG.  MEANWHILE, A COLD
     FRONT OVER INLAND GUANGDONG WILL MOVE ACROSS THE
     COAST TONIGHT.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  290/10 BEC 360/10-15
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  290/15-20 BEC 360/20                 23-19
   B.   2000 FT:  320/15-20 BEC 020/20-25              18
   C.   5000 FT:  270/20                               17
   D.  10000 FT:  270/30                               9
   E.  18000 FT:  260/40                               MS5
   F.  24000 FT:  260/50                               MS14
   G.  30000 FT:  260/50                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      CLOUDY.  SHOWERS AND SQUALLY THUNDERSTORMS AT
      FIRST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 3000 FT  BKN 8000 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: 15000 FT      10 DEG. C LEVEL(S) : 9400 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS, OFFSHORE AND
                      NEAR HILLS.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 23 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTH TO NORTHEASTERLY.
     MAINLY CLOUDY WITH A FEW SHOWERS AT FIRST.
     BRIGHT PERIODS DURING THE DAY.=
===================================================================
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 18:50 HKT on 21 Apr 17

VHHK SIGMET 1 VALID 210650/211050 VHHH- VHHK HONG KONG FIR EMBD TS FCST N OF LINE N2242 E11730 - N2036 E11130 TOP FL380 MOV ESE 10KT NC= VHHK SIGMET 2 VALID 211050/211450 VHHH- VHHK HONG KONG FIR EMBD TS FCST N OF LINE N2206 E11730 - N1918 E11142 TOP FL380 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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Last revision date: <18 Apr 2017> 

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 21/Apr/2017
HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     27.5 C
Minimum Air Temperature                     25.1 C
Grass Minimum Temperature                   24.8 C
Relative Humidity                        78 - 93 Percent
Rainfall                                     3.1 mm 
Total rainfall since 1st January           101.4 mm
Against an average of                      277.4 mm

Other Stations                Min                  Max
King's Park                  24.6 C               27.7 C
Wong Chuk Hang               23.6 C               25.7 C
Ta Kwu Ling                  23.8 C               29.4 C
Lau Fau Shan                 23.7 C               28.8 C
Tai Po                       23.8 C               28.3 C
Sha Tin                      24.8 C               28.3 C
Tuen Mun                     24.0 C               28.0 C
Tseung Kwan O                23.5 C               27.3 C
Sai Kung                     24.3 C               26.8 C
Cheung Chau                  23.5 C               26.2 C
Chek Lap Kok                 24.5 C               29.0 C
Tsing Yi                     24.3 C               27.7 C
Shek Kong                    24.1 C               29.4 C
Tsuen Wan Ho Koon            23.5 C               25.3 C
Tsuen Wan Shing Mun Valley   24.4 C               27.4 C
Hong Kong Park               24.4 C               27.0 C
Shau Kei Wan                 23.4 C               26.8 C
Kowloon City                 24.1 C               27.5 C
Happy Valley                 24.8 C               27.5 C
Wong Tai Sin                 24.7 C               27.8 C
Stanley                      23.7 C               26.2 C
Kwun Tong                    24.4 C               27.4 C
Sham Shui Po                 24.6 C               28.4 C
Kai Tak Runway Park          24.6 C               27.0 C
Yuen Long Park               24.0 C               29.2 C
Tai Mei Tuk               23.6 C               28.3 C

Duration of sunshine (King's Park):              1.2 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 5.
 

Yesterday's (20 Apr 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                               0.09
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 20 Apr
Last revision date: <21 Apr 2017> 

From Weather Underground