Established on August 15, 2007, Hong Kong Weather Watch (HKWW) is a non-governmental meteorological interest site which integrates information from many official sources and presents it in an easily interpreted way for users' reference. As of November 2018, the site can be divided into five parts:
Our site mainly covers weather information about Hong Kong, with the exception of 1) Tropical Cyclone Watch in which related information is provided whenever there are tropical cyclones in the Northwest Pacific Ocean (The part of Pacific Ocean west of 180 degrees longitude, North of the equator), and 2) Part of Astronomical Information which is provided globally. Part D focuses on activities held by HKWW or those that HKWW participates in, and Part E contains other useful meteorological weblinks and information about HKWW.
Most of the contents in Hong Kong Weather Watch are updated automatically, while tropical cyclone reports are normally updated once per day manually except at times when the tropical cyclone(s) concerned is/are posing a direct threat to Hong Kong.
Our official Facebook page can be accessed via the link https://www.facebook.com/hkww.org/. Posts there are normally written in Chinese.
Should you have any enquiries, comments or suggestions, please email them to email@example.com or leave us a message via Facebook. Your valuable comments are vital to our successful development.
|About the Webmaster|
|Interests:||Meteorology, programming, watching soccer games, math/statistics and related disciplines|
The trial version of statistical model-based 6-hourly tropical cyclone signal issuance, cancellation and in force probabilities is added to tropical cyclone bulletins for storms that may affect Hong Kong.
Created our Facebook page.
A "9-day weather forecast sticker" is added.
More maps are added to "South China Weather Plots".
"South China Weather Plots" (Beta version) is now launched.
"TC Finder" is now launched.
The 128-km-range radar image is added.
Added a page on "Air Pollution Levels".
Added a page on "Official TC Track Info".
Reviews in Chinese are now available in "Selected TC Review".
Added pages on "Eclipse Q&A", "Eclipse Glossary", "Solar/Lunar Eclipse Dates and Numbers" and "Eclipse Calculator".
Rainfall nowcast images and more isohyet charts are added in the "Rainfall" page.
"Rainfall distribution & RADAR image" is added in "Warning(s) in Force" column on the mainpage, which will be activated whenever the thunderstorm warning / rainstorm warning signal / Special Announcement on Flooding in the Northern New Territories is/are in force.
"Air Pollution Index" column is added on the main page.
"Earthquake Information" column is added on the main page. This column shows information on significant seismic activities in the past 24 hours.
Added a page on TC names.
"Typhoon mode" system is implemented to reduce the load of the main server during passage of tropical cyclones.
A page on "QuikSCAT images" is added.
A page on "Tropical Cyclone Strike Probability" is added.
A map on "Weather Conditions in South China Sea" is added.
Added a new section on "Selected TC Review".
|2008/04/12||New layout for HKWW|
|2008/03/23||Added "Solar Information for Major Cities".|
|2008/03/06||A "Moon Phase Diagram" is added in "Astronomical / Tidal Information" column.|
|2008/01/30||A list of very cold/cold/very hot areas is provided at "Warning(s) in Force" section.|
|2008/01/19||Added a page on "World Clock".|
|2007/10/14||Added a tracking map that shows all non-governmental agencies' forecasts.|
|2007/10/08||Added a page on "Past Weather".|
|2007/10/01||Hong Kong Weather Watch adopts a new TC report policy.|
|2007/08/27||The Hong Kong Weather Watch Forum is now officially open to the public.|
|2007/08/21||The Chinese version of Hong Kong Weather Watch is completed.|
|2007/08/15||Hong Kong Weather Watch is now officially open to the public.|
|2007/08/14||Permission is granted by the Hong Kong Observatory for the reproduction of weather information in this site.|
|2007/06/17||Site construction begins|
|2019 - Now|
The preliminary review report for tropical cyclone LUPIT is now available on this page.
The preliminary review report for tropical cyclone CEMPAKA is now available on this page.
The preliminary review report for tropical cyclones 07W and 08W, which affected southern China earlier this month, is now available on this page.
早前影響華南的熱帶氣旋 07W 及 08W，其回顧報告初版已上載至此頁，歡迎瀏覽。
Our site's hosting provider updated its servers earlier today. After the update, our site was briefly inaccessible; we have now resolved the problem. However, because of the upgrade, some of our scripts written using the PHP language may not function normally. If that happens, please let us know by sending an email to firstname.lastname@example.org. We apologize for any inconvenience caused.
本網的網頁寄存公司於今天凌晨更新伺服器，更新後本網曾經無法進入，現時服務已經恢復正常。由於伺服器軟件有所更新，本網部分使用 PHP 語言編寫的檔案或未能正常運作。如發現此等情況，請發送電郵至 email@example.com。不便之處，敬請原諒。
The preliminary version of the review report for tropical cyclone KOGUMA, which affected Hong Kong several days ago, is now available.
A total lunar eclipse will take place tonight. The partial phase of the eclipse begins at 17:44 HKT, but it will only be visible in Hong Kong after moonrise at 18:56. For more details on the eclipse and links to live webcast sites, please visit our page on the Total Lunar Eclipse of May 26th, 2021. An eclipse animation is also available.
The "Astronomical, Geographic and Meteorological Events of 2020" election has concluded. Thank you for your support. A total of 141 votes were received this year, and the top three events are listed below:
「2020 年天文、地理及氣象大事選舉」已圓滿結束，多謝各位支持。是次投票人數為 141，結果首三位如下：
The preliminary version of the review report for tropical cyclone SAUDEL is now available on this page.
The preliminary version of the review report for tropical cyclone NANGKA is now available on this page.
The "Astronomical, Geographic and Meteorological Events of the 2010s" Election" has concluded - thank you for your support. The results are now available on this page.
The initial version of the tropical cyclone review reports for SINLAKU and HIGOS are now available here.
The review report for tropical cyclone NURI has been uploaded to this page.
An annular solar eclipse will take place in the afternoon of the coming Sunday (June 21), Hong Kong Time. The eclipse will be partial in Hong Kong with a large magnitude of 0.89, the highest among all visible eclipses in the next 50 years. For more details on this eclipse and links to live webcast sites, please visit our page on "Annular Solar Eclipse of June 21st, 2020". An eclipse animation is available here.
Our TC Finder page now includes information on tropical cyclones up to 2018.
本站之「熱帶氣旋尋找工具」頁資料已更新至涵蓋 2018 年影響本港之熱帶氣旋。
The "Astronomical, Geographic and Meteorological Events of 2019" has concluded. Thank you for your support. A total of 80 votes were received this year, and the top three events are listed below:
「2019 年天文、地理及氣象大事選舉」已圓滿結束，多謝各位支持。是次投票人數為 80，結果首三位如下：
An annular solar eclipse will take place in the afternoon of December 26 this year (Thursday), Hong Kong Time. The eclipse will be partial in Hong Kong, during which a maximum of around 35% of the solar surface will be obscured. The times of this eclipse as seen in Hong Kong are as follows: [link] For more details on this eclipse and links to live webcast sites, please visit our page on "Annular Solar Eclipse of December 26th, 2019". An eclipse animation is available here.
The HKO webpage was revamped today. Some of our links to pages on that site and features that rely on those pages may cease functioning. We are updating these pages and features gradually. Sorry for the inconvenience caused.
The review reports for tropical cyclones BAILU, PODUL and KAJIKI, which affected Hong Kong earlier, are now available on this page.
The preliminary version of the review report for tropical cyclone WIPHA, which affected Hong Kong earlier, is now available on this page.
A partial lunar eclipse will take place in the small hours tonight, and is visible in Hong Kong. More information on this eclipse and links to webcast sites can be found on our page on the "Partial Lunar Eclipse of July 17th, 2019".
本港將於今晚凌晨時份出現一次月偏食，有關月食詳情及直播站點連結，可參閱本站的 "2019 年 7 月 17 日之月偏食" 專頁。
The preliminary version of the review report for tropical cyclone MUN which affected Hong Kong earlier is now available here.
Our "Lunar Eclipse Dates and Numbers" page has been updated. This update includes information on lunar eclipses observable in Hong Kong between 2021 and 2050. Please visit the page here.
本網 "月食日期和數字" 頁已更新，新加入 2021 至 2050 年香港可見月食的資料，各位可到此查閱。
The "Astronomical, Geographic and Meteorological Events of 2018" has concluded. Thank you for your support. A total of 112 votes were received this year, and the top three events are listed below:
「2018 年天文、地理及氣象大事選舉」圓滿結束，多謝各位支持。是次投票人數為 112，結果首三位如下：
Following HKO's release of the tropical cyclone report for MANGKHUT, HKWW has updated our review report accordingly. Please click here to view. Some noticeable changes include the revision of the wind speeds at Cheung Chau and Sai Kung, with the latter revised to hurricane force level.
|2016 - 2018|
The preliminary version of the review report for tropical cyclone YUTU is now available here.
The preliminary version of the review reports for tropical cyclones MANGKHUT and BARIJAT are now available on this page.
The "Astronomical, Geographic and Meteorological Events of 2017" election has concluded and the first three places are as follows:
「2017 年天文、地理及氣象大事選舉」已圓滿結束，多謝大家支持。投票總人數為 121，結果首三位如下：
A total lunar eclipse will occur in the night of January 31 (Wed), and is visible in Hong Kong. Please visit our page on the eclipse for more information. A preview animation of the eclipse is available here.
The review reports for tropical cyclones HATO, PAKHAR, MAWAR and 22W have been uploaded to this page.
熱帶氣旋天鴿、帕卡、瑪娃及 22W 的回顧報告已經上載至此頁，歡迎瀏覽。
The review report of tropical cyclone MERBOK is now available in this page.
The page "Northwest Pacific - ASCAT Image" has now been updated to reduce image loading time.
本網 「西北太平洋: ASCAT 風場圖」頁面已經更新，用家現能較快讀取相關風場掃描影像。
Information for tropical cyclones that have affected Hong Kong up to the year 2015 is now available at our "TC Finder".
本站「熱帶氣旋尋找工具」已更新至 2015 年影響香港的熱帶氣旋資料，歡迎瀏覽。
Review reports for tropical cyclones that affected Hong Kong during the year 2016 have been uploaded to this page. Due to limited resources and as information about historical tropical cyclones becomes more widely available on the internet, we will not be providing review reports for tropical cyclones that attained category 5 strength starting from 2016. The format of the reports for tropical cyclones that affected Hong Kong has also been modified. We apologize for the inconvenience caused.
2016 年曾影響香港熱帶氣旋之回顧報告已上載於此頁，歡迎瀏覽。鑒於現時網上有關歷史熱帶氣旋的資訊已較豐富，加上本站資源所限，自 2016 年起我們不再為曾達五級超級颱風強度之熱帶氣旋編寫回顧，而影響香港熱帶氣旋之回顧報告格式亦有所改變。不便之處，敬請原諒。
We are now accepting applications as forecast issuing agency of our "Tracks from All Agencies". Please visit this page for more details. The tentative application deadline is March 14, 2017.
本站「各站預測路徑圖」現正接受加入申請，詳情請參閱此頁。暫定截止申請日期為 2017 年 3 月 14 日。
The "Astronomical, Geographic and Meteorological Events of 2016" Election has concluded. Thank you for your support! A total of 116 votes were received; the top three events are as follows:
2016 年天文、地理及氣象大事選舉已圓滿結束，多謝大家支持。投票總人數為 116，結果首三位如下：
The review reports for tropical cyclone MIRINAE and NIDA have been uploaded to this page.
Starting from today, we will provide statistical model-based 6-hourly tropical cyclone signal issuance, cancellation and in force probabilities together with our tropical cyclone reports. This experimental feature allows users to estimate intervals in which tropical cyclone signal changes are more probable.
The review report of tropical cyclone 01W is now available here.
熱帶氣旋 01W 的回顧報告已經上載至此頁，歡迎瀏覽。
The "Astronomical, Geographic and Meteorological Events of 2015" Election has concluded. Thank you for your support! Some results are as follows:
|2013 - 2015|
The review report for tropical cyclone KUJIRA has been uploaded to this page.
The review reports of the first three category 5 super typhoons this year (MAYSAK, NOUL and DOLPHIN) have been uploaded to this page.
本年首三個五級超級颱風 (美莎克、紅霞及白海豚) 的回顧報告已上載於此頁。
The "Astronomical, Geographic and Meteorological Events of 2014" Election has concluded. Thanks for your support. The results are now available at this page, with the top three events as follows:
"2014 年天文、地理及氣象大事選舉" 已結束，多謝支持！投票結果已上載至此頁，首三位如下：
All tropical cyclone review reports for this year have been completed and are available at this page.
A total lunar eclipse will take place on October 8, and is visible in Hong Kong. For more information, please visit our page on Total Lunar Eclipse of October 8th, 2014.
10 月 8 日將出現一次月全食，於本港可見。有關是次月食的資料，請到2014 年 10 月 8 日之月全食專頁。
The review report of tropical cyclone RAMMASUN is now available here.
We have created a page on facebook; our latest development can be found there. Please support!
本站現已設立 Facebook 專頁，大家可由該處得知本站最新動態，請多多支持！
The review of tropical cyclone HAGIBIS is now available here.
The Observatory has started to provide 9-day weather forecasts. Our website has thus been updated, together with the introduction of a 9-day weather forecast sticker available at this page.
The "Astronomical, Geographic and Meteorological Events of 2013" Election has concluded. Thanks for your support. The results are now available at this page, with the top three events as follows:
"2013 年天文、地理及氣象大事選舉" 已結束，多謝支持！投票結果已上載至此頁，首三位如下：
The review reports for tropical cyclones USAGI, FRANCISCO, LEKIMA, KROSA and HAIYAN have been uploaded and can be viewed through this page.
The reviews for tropical cyclones BEBINCA, RUMBIA and CIMARON are now available at this page.
The tropical cyclone game jointly organized by Hong Kong Wild Weather and Storm Information Centre and our site is now available at this page (in Chinese only).
As the Observatory replaced the Wetland Park reference wind station by Lau Fau Shan station, our page on "Wind Speed Data for TCs that Have Affected Hong Kong" has been modified accordingly. Changes in the percentile ranks are given here.
A partial lunar eclipse will be visible in Hong Kong during the small hours of April 26. For more details, please read our page on Partial Lunar Eclipse of April 26, 2013 and Animation of the eclipse.
The "Astronomical, Geographic and Meteorological Events of 2012" Election has concluded. Thanks for your support. The results are now available at this page, with the top three events as follows:
"2012 年天文、地理及氣象大事選舉" 已結束，多謝支持！投票結果已上載至此頁，首三位如下：
The review reports of tropical cyclones KAI-TAK (complete version), TEMBIN, JELAWAT and BOPHA are now available at this page.
|2010 - 2012|
Important: Our web address will formally change to http://david.samsiu.hk/weather on January 1 next year, and the old domain name will cease to work. Please update your links. Thank you!
重要：本站網址將由明年 1 月 1 日起正式改為 http://david.samsiu.hk/weather，而舊域名將會失效，請即更新你的連結，謝謝！
Manual updates of the site are resumed.
Due to severe malfunction of the webmaster's computer, it may not be possible to update bulletins on the next couple of days. Sorry for any inconvenience caused.
Manual updates will resume gradually upon the formation of the next tropical cyclone.
Manual updates of this site (e.g. tropical cyclone bulletins) will be temporarily suspended early next week for a couple of days as the Webmaster leaves Hong Kong. Sorry for any inconvenience caused. For the latest tropical cyclone information, please visit the following webpages:
由於網主即將出國，本網人手更新部分 (如熱帶氣旋發佈) 將於下周初暫停數天。不便之處，敬請原諒。如欲查詢最新熱帶氣旋資料，請瀏覽下列網頁：
The review report of tropical cyclone VICENTE is now available here.
熱帶氣旋 韋森特 的 回顧報告 已經上載，歡迎瀏覽。
The frequency of manual updates of this site (e.g. tropical cyclone bulletins) may be reduced from the middle to the end of this month. Sorry for any inconvenience caused.
由本月中至月底，本網人手更新部分 (如熱帶氣旋發佈) 頻率或會減低。不便之處，敬請原諒。
HKO's press release on Severe Typhoon VICENTE: here
Transit of Venus is now taking place, and our site is providing links to live webcast sites. For more information about the transit, please visit our page on Transit of Venus on June 6th, 2012 and transit animation.
A partial eclipse of the Moon will take place on June 4 this year, and is visible in Hong Kong just after sunset. For more details, please visit our page on Partial Lunar Eclipse of June 4th, 2012 and an eclipse simulation.
The annular solar eclipse today has come to a conclusion, and thank you for watching. Although the thick cloud cover has masked the sun during annularity, there are still other astronomical events observable in Hong Kong in the next two weeks. Stay tuned!
An annular solar eclipse will be visible in Hong Kong this morning, and HKWW is providing links to live webcast pages in our page on "Annular Solar Eclipse of May 21st, 2012". A solar eclipse animation is also available. Useful links:
An earthquake occurred at Heyuan City, Guangdong at 02:34 HKT, and the tremor was felt in Hong Kong. For more information on this earthquake, please visit the following sites.
Wish you all the best in the Year of the Dragon!
Announcement of the results for "Astronomical, Geographic and Meteorological Events of 2011" Election. The top three events are:
"2011 年天文、地理及氣象大事選舉" 結果公佈，首三位如下：
The tropical cyclone reviews of NESAT and NALGAE are available now. Starting from NESAT, review reports on cyclones that necessitated TC Signal Number 3 or above will include percentile rank data for reference after the Observatory releases relevant wind speed information.
The result of "Astronomical, Geographic and Meteorological Events of 2010" Election has been released (click here). Thank you for your support in this election. The top three events are:
"2010 年天文、地理及氣象大事選舉" 結果已於此頁公佈，多謝各位參與。首三項事件分別為：
The 42nd Typhoon Committee annual meeting was held earlier this year. It was decided that three of the tropical cyclone names currently on the list, including MORAKOT, KETSANA and PARMA, will be retired as a result of the intensive damages that they have caused. The replacement names will be determined in next year's meeting. Please click here to take a look at the revised list.
The 128-km-range radar image is added.
A page on "Air Pollution Levels" is added. This page shows the concentration of various pollutants over Hong Kong with their respective sub-indices, and can also be accessed through the "Details" hyperlink in the "Air Pollution Index" section on the main page.
The JTWC has recently issued best track and intensity data for tropical cyclones in 2009. These revised intensities are now available in our "TC Archive" page, and the best track data can be retrieved at this site. Also, as Typhoon Lupit was not a category 5 typhoon in real-time data, we will not provide review on this tropical cyclone.
HKO's temperature data for automatic weather stations at Wong Tai Sin, Happy Valley and Kwun Tong are added in our "Regional Weather" section/page.
The results of "Astronomical, Geographic and Meteorological Events of 2009" Election is announced. We thank all for your participation. The top three events are:
"2009 年天文、地理及氣象大事選舉" 結果公佈，謝謝各位的參與。首三位事件為 :
Happy New Year! As a result of poor weather conditions, the lunar eclipse that occurred earlier today was not visible in Hong Kong. However, a partial solar eclipse will be visible in the territory on January 15 and two visible partial lunar eclipses will occur on June 26 and December 21 respectively. Click here for our page on "Annular Solar Eclipse of January 15th, 2010".
|2007 - 2009|
A new look for our "Delta P Values" column.
The page "Official TC Track Info" is added. It shows all named tropical cyclones in NW Pacific and the South China Sea and includes track and intensity forecasts from major official agencies.
For the news article on the waterspout spotted in Hong Kong waters on Aug 19, please refer to the following web page : http://www.info.gov.hk/gia/general/200908/19/P200908190213.htm.
A penumbral lunar eclipse will occur on Aug 6 but is not visible in Hong Kong. For more information, please refer to NASA's PDF document on this eclipse: http://eclipse.gsfc.nasa.gov/LEplot/LEplot2001/LE2009Aug06N.pdf.
The finalized reviews of tropical cyclones LINFA, NANGKA and the preliminary reports of tropical cyclones SOUDELOR and MOLAVE are now available in this page.
Hong Kong can witness a large-scale partial solar eclipse on July 22nd if weather permits, and live webcast will be available at that time. For more information, please refer to our special page "Total Solar Eclipse of July 22nd, 2009" and animation of the eclipse. Furthermore, we have added pages on "Eclipse Q&A", "Eclipse Glossary", "Solar Eclipse Dates and Numbers" and "Solar Eclipse Calculator" for your reference.
We have added "Rainfall distribution & RADAR image" in "Warning(s) in Force" column on the mainpage, which will be activated whenever the thunderstorm warning and/or rainstorm warning signal are/is in force.
Dr. Lee Boon-ying was appointed the (acting) Director of the Hong Kong Observatory, replacing Mr. Lam Chiu-ying who is about to retire. [Organizational Chart] [Director's Blog]
The Observatory announced earlier that two more categories, "severe typhoon" and "super typhoon", are to be introduced to the tropical cyclone classification system from this year (Details). We will stay with our current system, but a conversion chart will be provided later for reference. Click here for our current tropical cyclone classification system.
A "share" functionality ( ) is added for you to share the page via other websites (e.g. Facebook), and you can bookmark that page via that button.
A penumbral lunar eclipse will be visible in Hong Kong from 8 to 12 tonight (9th Feb) if the weather permits (View it LIVE on web!). Please refer to HKO's press release for more details.
"Air Pollution Index" column is added on the main page.
"Earthquake Information" column is added on the main page. This column shows information on significant seismic activities in the past 24 hours.
As the beta test result of "Tropical Cyclone Strike Probability" is unsatisfactory, this product will be temporarily removed from our site from now on.
Our site resumes normal service on 1st September. From now on, we will turn to the typhoon mode when bandwidth usage surges so as to reduce the load of the main server.
An earthquake of mangitude 7.8 occurred in Sichuan Province at 2:28 p.m. local time today. The Observatory has received reports from local residents and this tremor was also recorded by the Observatory. See here for more.
HKWW presents to you a new look of our website! All frames that appeared in the previous version have been combined into one and you can now navigate through pages using the navigation bar near the top of each page. If you have any suggestions about this theme (or if you find any bugs), please email to me at firstname.lastname@example.org. I hope you enjoy this new theme!
A list of very cold/cold/very hot places in Hong Kong is provided in "Warning(s) in Force" section, which will be activated when the cold/very hot weather warning is in force. Click on the link to view the list.
1) An upgrade of PHP version was made to this site's server earlier today. However it is found that some important libraries and methods are missing. Therefore, you may see warning messages when some of our programs are run, which is due to the problem stated above. My apologies for the inconvenience, and I may switch to another server if problem persists. Please stay tuned for the latest information.
2) The permanent link for the "multi-agency tracking map" has been changed from http://www.hkww.org/weather/agencytc/ to http://220.127.116.11/~hkmccnete4/david/agencytc/. I have discontinued updates to the former address, with immediate effect.
1) 較早前本網的伺服器更新了 PHP 版本，但沒有提供一些重要的程序庫。因此，當一些程式運行時，可能會出現警告語句，網主在此為這帶來的不便致歉。如情況持續，網主不排除會轉用另一個伺服器以解決這個問題。請留意本網以獲取最新消息。
|2007/10/14 23:05||Added a tracking map that shows all agencies' forecasts. Please click here for the page. If you would like to add your site's forecast track into our map, please contact me.
|2007/09/27 22:30||Hong Kong Weather Watch will adopt a new TC report policy on 1st Oct., 2007. Please refer to here for details.
|2007/09/27 22:35||A color-coded TC figure is released. Available at here (also in this page when there is/are active TC(s)).
|2007/08/28 22:03|| The moon leaves the penumbra and the "Live Webcast of the Lunar Eclipse on 28/8/2007" is now finished. Thank you for your support. (Auto-refreshing of this page has now been resumed)
隨著月球離開地球的半影，"28/8/2007 月全食直播" 經已播放完畢。謝謝各位的支持。(本頁面每300秒自動更新的功能經已恢復)
|2007/08/28 15:00||To prevent obstruction when watching the live webcast, auto-refreshing of this page has been temporarily disabled. Please use the "Refresh" button to manually refresh this page.
為了避免妨礙觀看 "月全食直播" ，本頁面將暫停每300秒自動更新的功能，直至直播完畢為止。請使用本頁的 "更新" 連結來手動更新頁面。
|2007/08/27 23:39||The Hong Kong Weather Watch Forum is now available. Please register at here!
|2007/08/18 13:15|| The Chinese version of HKWW is being constructed now and will be available soon.
Last Accessed: Wed Oct 20 2021 02:43:12 HKT
Last Modified: Thu Aug 19 2021