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Bulletin updated at 03:45 HKT 03/Sep/2017

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

Weather forecast for today

Cloudy with squally showers and thunderstorms. Temperatures will range between 26 and 29 degrees. Moderate northwesterly winds, becoming fresh southwesterlies, strong offshore. There will be swells.

Outlook : There will still be squally showers on Monday. The weather will improve in the following couple of days.

(The above forecast period is valid up to 23:59 HKT today, 03/09/2017; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

Marine Forecast

South China Coastal Waters

Weather Forecast for Local Aviation

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 :
     AT 1 A.M., SEVERE TROPICAL STORM MAWAR WAS
     CENTRED NEAR 21.7 DEGREES NORTH 117.1 DEGREES
     EAST AND IS FORECAST TO MOVE NORTH-NORTHWEST
     SLOWLY IN THE GENERAL DIRECTION OF THE COAST OF
     EASTERN GUANGDONG AND STRENGTHEN GRADUALLY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  340/5-10
                  BEC 280/10-15
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  340/15-20
                  BEC 280/20-25                        26-31
   B.   2000 FT:  010/10-15
                  BEC 290/20-25, OCNL 30 IN E          24
   C.   5000 FT:  020/15
                  BEC 300/20-25, OCNL 30 IN E          20
   D.  10000 FT:  010/20-25, OCNL 30 IN E              10
   E.  18000 FT:  020/20-25                            MS2
   F.  24000 FT:  050/20                               MS12
   G.  30000 FT:  080/20
                  BEC 080/30                           MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      CLOUDY WITH SQUALLY SHOWERS AND THUNDERSTORMS.
      LOCALISED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT  SCT 4000 FT.  TEMPO FEW CB 1000 FT
      SCT 2000 FT  BKN 4000 FT.
   K. VISIBILITY    : 7 KM.  TEMPO 3000 M IN SHOWERS/MIST.  TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS, OFFSHORE AND  NEAR HILLS
   N. SEA STATE     : 2.0-4.0 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     FRESH TO STRONG SOUTHWESTERLY WINDS.  CLOUDY
     WITH SQUALLY SHOWERS AND THUNDERSTORMS.=

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

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.

Please click here for more about the SIGMET

The latest report on Tropical Cyclone Mawar broadcast by Dr WONG WING TAK , Senior Scientific Officer of the Hong Kong Observatory at 5:33 p.m. on 02 Sep 2017. Listen

Weather Information for Schools