The Observatory issued the first Red Rainstorm Warning Signal this year
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At around 9am today (April 20), a band of thundery showers developed at around 200 kilometres to the northwest of Hong Kong (Figure 1). While moving southeastwards, it became more organised. At 11.45am, when the band of thundery showers moved to the vicinity of Guangzhou (Figure 2), the Observatory issued a Special Weather Tip reminding the public that the thundery showers might affect Hong Kong in the afternoon and advised them to pay attention to weather changes. Then at 12.45pm, the Observatory issued the Thunderstorm Warning to alert the public of the occurrence of squally thunderstorms. The Amber Rainstorm Warning Signal was issued at 1.40pm.
As showers became heavier, the Observatory issued the Red Rainstorm Warning Signal at 2.20pm, the first for this year. The band of thundery showers moved across Hong Kong rapidly. The Observatory issued the Amber Rainstorm Warning Signal at 3.20pm to replace the Red Rainstorm Warning Signal, and cancelled all rainstorm warning signals at 4.45pm.
During the rainstorm episode, more than 40 millimetres of rainfall were generally recorded over the territory. Showers were heavier over the western and northern parts of the New Territories and Lantau Island where rainfall exceeded 60 millimetres (Figure 3). Heavy showers were also accompanied by squalls. Gusts exceeding 100 kilometres per hour were recorded at Green Island and North Point.
Ends/Saturday, April 20, 2019
Issued at HKT 19:46
Issued at HKT 19:46
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