Warning(s) in Force [Details] [Def]

Weather Details around Hong Kong [Details] [HKO link]

Tropical Cyclone Information [Details] [HKO link]

Astronomical / Tidal Information [Details] [HKO link]

Info for 21/07/2017 (Friday):

Astro. Info				Tide
Sunrise	:	05:51		07:11	2.3 m
Sunset	:	19:09		14:04	0.4 m
Moonrise	:	03:24		20:58	1.4 m
Moonset	:	17:00

Weather at a Glance [Details] [HKO link]

Data as of 04:10 on 21/7/2017

• In Brief
• Detailed

27.9 C	88 %	1008.2 hPa
All measurements taken at Hong Kong Observatory

HKO	Temp.:	27.9 C
	RH.:	88 %
	Apparent Temp.:	33.1 C (EXTREME CAUTION)
	Dew Point:	25.7 C
	Temp. of today:	28.1 / 27.9 C (Range 0.2 C)
	Mean SLP.:	1008.2 hPa
King's Park	Wind:	9 km/h (SE)
	UV:	N/A
	Rain:	0.0 mm (past 15 min)

Upper-Level Weather Information [Details]

Data as of 20:00 HKT on 20/7/2017 - Level of instability:

3-day Weather Forecast [Click for 9-day] [HKO link]

Data as of 00:00 HKT 21/Jul/2017

General Situation: The subtropical ridge will bring generally fine weather to southeastern China today. It is expected that an area of low pressure will develop over the northern part of the South China Sea today and tomorrow, and bring unsettled weather to the south China coastal areas during the weekend. With the subtropical ridge strengthening again, the weather over southern China will improve gradually early next week.

Date	21/7 (Fri)	22/7(Sat)	23/7(Sun)
Weather	Sunny periods and a few showers.	Mainly cloudy with occasional showers and a few thunderstorms.	Mainly cloudy with occasional showers. Sunny intervals in the afternoon.
Wind	E to SE force 3 to 4, occasionally force 5 offshore later.	E to SE force 4 to 5, occasionally force 6 offshore.	E to SE force 4, occasionally force 5 offshore.
Temp.	27 - 32 °C	26 - 29 °C	26 - 30 °C
R.H.	70 - 95 %	80 - 95 %	80 - 95 %

Weather Conditions in South China Sea [Details] [HKO link]

Real-time Weather Photos [Details] [HKO link]

The following photo shows the real-time view of Victoria Harbour (active from 5am to 9pm), as viewed from Central towards the east.

Satellite / Radar Images [Details]

Radar: 256 km range	Radar: 128 km range	Radar: 64 km range	Satellite: IR imagery*

* The Satellite imagery above is taken by Himawari-8 operated by the Japan Meteorological Agency (JMA).

Aviation Weather Observation Report [HKO link]

Data as of 04:00 HKT on 21 Jul 17

Original code: METAR VHHH 202000Z 03004KT 9999 FEW022 SCT040 28/25 Q1008 NOSIG=

Wind	Visibility	Weather	Cloud Amount	Cloud Base	Temperature	Dew Point	Pressure (QNH)
4 knots from 030 degrees (NNE)	10 km or above	No significant weather	1 to 2 oktas 3 to 4 oktas	2200 feet 4000 feet	28 oC	25 oC	1008 hPa

Next Two Hours Change

No Significant Change

Meteorological Calculation

A. Conversion between units Please select unit --------- Temperature --------- C     Celsius F     Fahrenheit K     Kelvin R     Rankine --------- Length --------- km     Kilometre mi     Statute Mile NM     Nautical Mile --     Degree of Latitude m     Metre ft     Foot --------- Speed --------- km/h     Kilometre per Hour m/s     Metre per Second mph     Statute Mile per Hour kt     Knot (Nautical Mile per Hour) --------- Direction --------- Degree(s) => Direction --------- Pressure --------- hPa/mb     Hectopascal/Millibar inHg     Inch of Mercury atm     Atmosphere mmHg     Torr

B. Calculation of distance between places on Earth Place 1:     Lat :   Long : Place 2:     Lat :   Long :

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