The Hong Kong Observatory Thursday announced the launch of its
Ultraviolet (UV) Index forecast service.
The new service will enable people to adopt appropriate
protective measures against possible harm from UV radiation when
planning outdoor activities.
At 5:00 PM everyday, starting from Thursday, a forecast of
the maximum UV Index for the following day will be provided. When
the UV index is expected to be 11 (corresponding to an extreme UV
level) or above, people will be reminded of the need to take
protective measures, such as avoiding prolonged exposure under the
In a press conference, Assistant Director of the Observatory Lee
Boon-ying explained that UV radiation from the sun to reach the
earth after passing through the atmosphere may be modified by a
number of weather factors.
By forecasting the weather situation for the next day, the
Observatory calculates the corresponding UV index. The purpose of
issuing the forecast UV index is to assist people, especially those
frequently engaged in outdoor activities, to take necessary
protections against exposure to UV, said he.
Also at the press conference was Principal Medical and Health
Officer of the Department of Health Dr Ng Chi-cheung. He said that
moderate exposure to the sun was good to people's health, but
overexposure to UV could induce skin and eye injury, cataract and
"On days when the UV Index is on the high side, one should wear
a hat, use an umbrella, wear suitable clothing and apply sunscreen
lotion to protect the body. The Observatory's forecast UV Index
enables people to make the necessary precautions against changes in
UV," Dr Ng said.
The UV forecast information can be obtained through radio,
television, Dial-a-Weather service, the Observatory's website and
Personal Digital Assistant (PDA) website.
(Xinhua News Agency May 12, 2006)