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 17/12/2018 (Monday):

Astro. Info				Tide
Sunrise	:	06:56		03:26	1.7 m
Sunset	:	17:43		10:34	1.0 m
Moonrise	:	13:42		18:36	1.9 m
Moonset	:	01:19		23:43	1.4 m

Dec 22, 06:22 HKT: Winter Solstice

Dec 23, 01:49 HKT: Full Moon

Dec 23, 05:00 HKT: Ursid Shower: ZHR = 10

Dec 23, 19:48 HKT: Moon North Dec.: 21.6° N

Dec 24, 17:52 HKT: Moon Perigee: 361100 km

Dec 24, 19:54 HKT: Moon Ascending Node

Weather at a Glance [Details] [HKO link]

Data as of 20:50 on 17/12/2018

• In Brief
• Detailed

18.0 C	58 %	1023.3 hPa
All measurements taken at Hong Kong Observatory

HKO	Temp.:	18.0 C
	RH.:	58 %
	Apparent Temp.:	18.0 C
	Dew Point:	9.6 C
	Temp. of today:	21.0 / 15.6 C (Range 5.4 C)
	Mean SLP.:	1023.3 hPa
King's Park	Wind:	3 km/h (NE)
	UV:	N/A
	Rain:	0.0 mm (past 15 min)

Upper-Level Weather Information [Details]

Data as of 08:00 HKT on 17/12/2018 - Level of instability:

Delta P Values

At 2018/12/17 17 HKT: [Explanation] [Values for the past 10 days]

Delta p(972) = 4.6
Delta p(S) = 3.7

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

Data as of 19:45 HKT 17/Dec/2018

General Situation: A dry northeast monsoon will continue to bring generally fine weather to southern China tomorrow. It will be cool in the morning over the coastal areas. The temperature difference between day and night will be relatively large. A relatively warm and humid easterly airstream will affect the coast of Guangdong in the middle and latter parts of this week. It will be cloudier and temperatures will rise gradually over the region. Another northeast monsoon is expected to affect the south China coastal areas early next week.

Date	18/12 (Tue)	19/12(Wed)	20/12(Thu)
Weather	Mainly fine and dry. Cool in the morning.	Mainly cloudy with a few light rain patches.	Sunny periods. A few light rain patches in the morning.
Wind	NE force 4, becoming E force 4 to 5 later.	E force 4, force 5 at first.	E force 3 to 4.
Temp.	16 - 22 °C	19 - 22 °C	20 - 23 °C
R.H.	50 - 80 %	75 - 90 %	80 - 90 %

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 20:30 HKT on 17 Dec 18

Original code: METAR VHHH 171230Z 09004KT 030V140 CAVOK 18/09 Q1023 NOSIG=

Wind	Visibility	Weather	Cloud Base	Temperature	Dew Point	Pressure (QNH)
4 knots from 090 degrees (E), variability: 030-140 degrees	10 km or above	No significant weather	No cloud below 5000 feet, no cumulonimbus.	18 oC	9 oC	1023 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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