WEATHER FORECAST FOR LOCAL AVIATION

Weather Forecast for Local Aviation

Bulletin issued at 01:30 HKT 18/SEP/2020
(Next update at 9:00-9:30 HKT 18/SEP/2020)
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 :
     AN EASTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS. BESIDES, PRESSURE OVER THE
     NORTHERN PART OF SOUTHERN CHINA IS RISING, THE
     NORTHEAST MONSOON IS EXPECTED TO AFFECT THE
     SOUTH CHINA COASTAL AREAS THIS MORNING.
     
     AT 11 P.M. LAST NIGHT, SEVERE TROPICAL STORM
     NOUL WAS LOCATED AT 16.1 DEGREES NORTH, 111.6
     DEGREES EAST. IT IS FORECAST TO MOVE
     WEST-NORTHWEST AT ABOUT 14 KT ACROSS THE CENTRAL
     PART OF THE SOUTH CHINA SEA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  100/15-20
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  100/20-25                            26-30
   B.   2000 FT:  100/25-30                            24
   C.   5000 FT:  090/30                               20
   D.  10000 FT:  120/30                               13
   E.  18000 FT:  130/25                               0
   F.  24000 FT:  130/20                               MS10
   G.  30000 FT:  110/20                               MS22
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY WITH OCCASIONAL SHOWERS AND A FEW
      SQUALLY THUNDERSTORMS. SHOWERS WILL BE HEAVY AT
      TIMES LATER.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 3000 FT
      TEMPO FEW CB 1000 FT SCT 2500 FT BKN 4000 FT
   K. VISIBILITY    : 10 KM, TEMPO 3000 M IN SHOWERS. TEMPO 1500 M IN TS
   L. 0 DEG. C LEVEL: 18000 FT      10 DEG. C LEVEL(S) : 11600 FT
   M. TURBULENCE    : MOD TO SEV
   N. SEA STATE     : 3.0-4.0 M     SEA TEMPERATURE    : 29 DEG
IV.  FURTHER OUTLOOK: 
     FRESH EAST TO SOUTHEASTERLY WINDS, OCCASIONALLY
     STRONG OFFSHORE AND ON HIGH GROUND. MAINLY
     CLOUDY WITH OCCASIONAL HEAVY RAIN AND A FEW
     SQUALLY 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.


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