Draft:Landslip Warning

Landslip Warning
Landslip Warning
	Icon of the Landslip Warning
Traditional Chinese	山泥傾瀉警告
Simplified Chinese	山泥倾泻警告
Hanyu Pinyin
Transcriptions
Standard Mandarin
Hanyu Pinyin	shānníqīngxiè jǐnggào
Yue: Cantonese
Yale Romanization	sāan nàih kīng se gíng gou
Jyutping	saan1 nai4 king1 se3 ging2 gou3

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Instructions · What links here · Landslip Warning (talk: + · bio) · (log) · Copyvios report · reFill · Citation Bot · (Search: Google, Wikipedia) · Submitted 35 hours ago by GhostJp (talk: D · +) · Last edited 11 hours ago by GhostJp

Landslip Warning, is a warning issued by the Hong Kong Observatory (HKO) in conjunction with Geotechnical Engineering Office (GEO) when there is a high risk of many landslides as a result of persistent heavy rainfall.

The warning is meant to alert the public to take precautionary measures; aid engineers, contractors and others who are likely to suffer losses from landslides; and alert relevant government departments and organisations to take appropriate actions, such as opening of temporary shelters, search and rescue operations, closure of individual schools and relief work.^[1]^[2]

History

In April 1977, the original two warning Amber and Red Landslip Warning introduced, however it was not public. In 1983, the warning was simplified into the current Landslip Warning and introduced to the public.^[3]

In May 2024, the Special Landslip Advisory was introduced for situations when heavy rains persist in some areas but the risk of landslides in the majority of Hong Kong does not reach the Landslip Warning level, the GEO and the HKO will issue it to list out areas with a higher risk of landslides, to alert the public to the danger of landslides in those specific areas. ^[4]

Landslide Potential Index

The Landslide Potential Index (LPI), is derived by estimating the potential number of landslides based on rainfall intensity, rainfall location and spatial distribution of slopes in Hong Kong.^[5]

The GEO will post the LPI of each intense rainstorm when the rainstorm ends (typically when the Landslip Warning is cancelled) to inform the public of its severity.^[5]


Landslide Potential Index	Description
> 100	Extremely High
51 - 100	Very High
10 - 50	High
< 10	Low

Issuance of Strong Monsoon Signal since 2000

Source:^[6]

Accurate as of 29 July 2026


Time of Issuence	Time of Cancellation	Duration
2000
03/04/2000 20:15	04/04/2000 02:15	6 hr
14/04/2000 06:40	15/04/2000 05:50	23 hr 10 min
23/04/2000 02:25	23/04/2000 10:40	8 hr 15 min
02/05/2000 20:15	03/05/2000 06:30	10 hr 15 min
18/06/2000 07:00	19/06/2000 06:30	23 hr 30 min
24/08/2000 16:30	24/08/2000 23:30	7 hr
2001
06/06/2001 06:00	06/06/2001 14:00	8 hr
08/06/2001 07:45	08/06/2001 17:00	9 hr 15 min
12/06/2001 14:15	12/06/2001 17:45	3 hr 30 min
27/06/2001 15:45	28/06/2001 07:25	15 hr 40 min
06/07/2001 18:00	07/07/2001 09:50	15 hr 50 min
30/08/2001 15:30	30/08/2001 23:15	7 hr 45 min
01/09/2001 22:45	02/09/2001 10:00	11 hr 15 min
08/09/2001 03:30	08/09/2001 08:45	5 hr 15 min
2002
10/08/2002 11:00	10/08/2002 15:00	4 hr
15/09/2002 03:45	15/09/2002 20:30	16 hr 45 min
17/09/2002 01:30	17/09/2002 12:45	11 hr 15 min
2003
05/05/2003 07:30	06/05/2003 07:00	23 hr 30 min
2004
17/07/2004 05:30	17/07/2004 11:00	5 hr 30 min
29/08/2004 15:30	30/08/2004 06:15	14 hr 45 min
2005
24/06/2005 10:15	25/06/2005 07:45	21 hr 30 min
19/08/2005 21:00	22/08/2005 06:15	57 hr 15 min
2006
03/05/2006 02:30	03/05/2006 13:00	10 hr 30 min
02/06/2006 14:00	02/06/2006 22:15	8 hr 15 min
09/06/2006 14:30	09/06/2006/ 17:20	2 hr 50 min
13/09/2006 11:45	14/09/2006 04:15	16 hr 30 min
2007
20/05/2007 09:00	20/05/2007 14:30	5 hr 30 min
2008
19/04/2008 19:10	20/04/2008 02:20	7 hr 10 min
07/06/2008 01:10	08/06/2008 12:00	34 hr 50 min
13/06/2008 23:00	14/06/2008 18:45	19 hr 45 min
25/06/2008 08:10	25/06/2008 21:45	13 hr 35 min
10/07/2008 09:05	10/07/2008 17:25	8 hr 20 min
2009
19/07/2009 03:00	19/07/2009 12:35	9 hr 35 min
15/09/2009 18:00	16/09/2009 00:30	6 hr 30 min
2010
22/07/2010 18:10	23/07/2010 04:35	10 hr 25 min
28/07/2010 16:30	28/07/2010 21:30	5 hr
21/09/2010 04:15	21/09/2010 09:00	4 hr 45 min
2011
None issued
2012
24/07/2012 01:10	24/07/2012 15:00	13 hr 50 min
2013
22/05/2013 05:10	22/05/2013 22:00	16 hr 50 min
2014
30/03/2014 23:50	31/03/2014 05:00	5 hr 10 min
31/03/2014 09:15	31/03/2014 15:30	6 hr 15 min
09/05/2014 13:15	09/05/2014 23:40	10 hr 25 min
11/05/2014 21:05	12/05/2014 06:50	9 hr 45 min
13/08/2014 11:40	13/08/2014 22:40	11 hr
2015
20/05/2015 21:45	21/05/2015 06:30	8 hr 45 min
22/07/2015 10:45	22/07/2015 17:00	6 hr 15 min
2016
02/08/2016 08:15	02/08/2016 12:40	4 hr 25 min
19/10/2016 09:20	19/10/2016 22:00	12 hr 40 min
2017
24/05/2017 11:15	24/05/2017 17:15	6 hr
13/06/2017 08:55	13/06/2017 21:00	15 hr 5 min
17/07/2017 21:00	19/07/2017 07:40	34 hr 40 min
27/08/2017 16:10	27/08/2017 23:15	7 hr 5 min
2018
07/06/2018 07:40	08/06/2018 15:50	32 hr 10 min
29/08/2018 18:00	30/08/2018 18:00	24 hr
16/09/2018 14:20	17/09/2018 11:20	21 hr
2019
31/07/2019 20:40	02/08/2019 09:15	36 hr 35 min
26/08/2019 02:50	26/08/2019 21:55	19 hr 5 min
2020
06/06/2020 04:45	07/06/2020 17:00	36 hr 15 min
19/08/2020 05:45	19/08/2020 15:45	10 hr
2021
28/06/2021 11:10	28/06/2021 17:30	6 hr 20 min
08/10/2021 09:50	10/10/2021 10:00	48 hr 10 min
2022
12/05/2022 21:15	13/05/2022 15:15	18 hr
2023
02/09/2023 05:50	02/09/2023 17:15	11 hr 25 min
07/09/2023 23:45	11/09/2023 20:15	92 hr 30 min
09/10/2023 02:00	10/10/2023 06:30	28 hr 30 min
2024
04/05/2024 10:30	05/05/2024 06:15	19 hr 45 min
2025
05/08/2025 02:15	06/08/2025 14:30	36 hr 15 min
14/08/2025 14:00	15/08/2025 00:25	10 hr 25 min
24/09/2025 09:15	25/09/2025 06:30	21 hr 15 min
2026
18/06/2026 13:30	19/06/2026 09:00	19 hr 30 min

Issuance and Effective Dates by year

Source:^[6]

Accurate as of 29 July 2026
Denotates most issued since 2000


Year	Times Issued	Effective Dates
2000	6	10
2001	8	11
2002	3	3
2003	1	2
2004	2	3
2005	2	6
2006	4	5
2007	1	1
2008	5	8
2009	2	3
2010	3	4
2011	0	0
2012	1	1
2013	1	1
2014	5	6
2015	2	3
2016	2	2
2017	4	6
2018	3	6
2019	2	4
2020	2	3
2021	2	4
2022	1	2
2023	3	8
2024	1	2
2025	3	6
2026	1	2
Total^[a]	70	112
Average^[a]	2.592	4.148

Notes

^ ^a ^b Since 1 January 2000

References

^ "Landslip Warning". hko.gov.hk. Retrieved 29 July 2026.
^ "Landslip Warning System". hkss.cedd.gov.hk. Retrieved 30 July 2026.
^ Pui-yin, Ho. Weathering The Storm (PDF). pp. 316 and 318.
^ Landslip Warning System (PDF). August 2025. p. 2.
^ ^a ^b "Landslide Potential Index". hkss.cedd.gov.hk. Retrieved 29 July 2026.
^ ^a ^b "Landslip Warning". hko.gov.hk. Retrieved 29 July 2026.

[fn1-7] Since 1 January 2000

[1] "Landslip Warning". hko.gov.hk. Retrieved 29 July 2026.

[2] "Landslip Warning System". hkss.cedd.gov.hk. Retrieved 30 July 2026.

[3] Pui-yin, Ho. Weathering The Storm (PDF). pp. 316 and 318.

[4] Landslip Warning System (PDF). August 2025. p. 2.

[:0-5] "Landslide Potential Index". hkss.cedd.gov.hk. Retrieved 29 July 2026.

[:1-6] "Landslip Warning". hko.gov.hk. Retrieved 29 July 2026.

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