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Bulletin updated at 12:45 HKT 03/Jun/2018

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

An easterly airstream is affecting the coast of Guangdong.

At noon, the tropical depression over the southern part of the South China Sea was centred about 350 kilometres south-southwest of Xisha. It is forecast to move north-northwest at about 12 kilometres per hour across the central part of the South China Sea.

Weather forecast for this afternoon and tonight

Hot with sunny periods in the afternoon. Mainly cloudy with one or two showers tonight. Moderate easterly winds, occasionally fresh offshore.

Outlook : Sunny intervals and a few showers tomorrow. There will be squally showers and thunderstorms in the following couple of days.

(The above forecast period is valid up to 23:59 HKT today, 03/06/2018; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

South China Coastal Waters

Weather Forecast for Local Aviation

I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS. 
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE COAST OF
     GUANGDONG.
     AT NOON., TROPICAL DEPRESSION OVER THE SOUTHERN
     PART OF SOUTH CHINA SEA WAS LOCATED NEAR 13.8 N
     111.4 E AND IS FORECAST TO MOVE NORTH-NORTHWEST
     AT ABOUT 6 KNOTS ACROSS THE CENTRAL PART OF THE
     SOUTH CHINA SEA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1300 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/10-15
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  080/15-20, OCNL 25                   33-28
   B.   2000 FT:  120/15-20                            23
   C.   5000 FT:  180/10                               19
   D.  10000 FT:  170/5                                12
   E.  18000 FT:  130/5                                MS2
   F.  24000 FT:  360/5                                MS13
   G.  30000 FT:  240/10                               MS24
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2900-3400 FT
   I. WEATHER       : 
      SUNNY PERIODS, MAINLY CLOUDY TONIGHT.  ISOLATED
      SHOWERS AND THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT. TEMPO FEW CB 800 FT  SCT 1500 FT
      BKN 4000 FT.
   K. VISIBILITY    : 10 KM. TEMPO 4000 M IN SHOWERS. TEMPO 2500 M IN TS.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 11000 FT
   M. TURBULENCE    : MOD TO SEV
   N. SEA STATE     : 2.0-3.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY WINDS, FRESH OFFSHORE.  MAINLY
     CLOUDY. A FEW SHOWERS AND ISOLATED THUNDERSTORMS.=

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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
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Aviation Weather Observation and Forecast Information for Hong Kong International Airport

To know more about clouds, please see Commonly observed clouds in Hong Kong.