Thunderstorm Warning

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Thunderstorms usually occur in spring and summer. In average, Hong Kong should have 5 days of records of thunderstorm occurrence in each month between April and September each year.

Thunderstorms are severe, dangerous and localized natural phenomenon. Generally speaking, thunderstorms should be associated with rain. But we cannot say this is a must. However, thunders usually lead to lightning, which may destroy electrical fittings, hence cause fire or electrocute people. Gusty winds brought by thunderstorms may also wave up rough seas. It will be a risk that many fishing boats would sink in the wake of the thunderstorms.

Sometimes, waterspouts would also occur at exposed places on the sea or along the coast. At the same time, hailstorms are not ruled out too. However, hailstorms and waterspouts are rare.

Thunderstorm warnings will be issued as an alert to people whenever thunderstorm is expected to affect the territory soon (in 4 hours or less). Whatever the thunderstorm is going to affect only some parts of the territory, the thunderstorm warning would still be issued. If the thunderstorm possibly continues to affect the parts or even other parts of the territory, the effective time of the warning would be lengthened.

Points to Note:

  • When the thunderstorm warning has been issued, listen to radio or television broadcast of latest weather bulletins and take appropriate measures.
  • Do not touch any metallic fittings like TV aerials, water supply tubes and iron nets under any condition.
  • Stay indoors. Do not linger in exposed areas or on high grounds. Evacuate from trees or signal-transmitting towers which are probably stroke by lightening.
  • Those who are swimming or undergoing water activities must immediately go on shore and find a temporary shelter.
  • Drivers using highways and flyovers should be particularly alert to strong gusts.
  • Boat owners should be aware of strong gusts and waterspouts.

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