PM2.5 elevated islandwide, smoke haze may affect Singapore again on Saturday全岛PM2.5浓度升高，烟霾可能于周六再次影响新加坡。
If you are looking forward to outdoor activities over the weekend, after seeing better PM2.5 and PSI levels across Singapore on Friday (Oct 23) morning, you may have to adjust your plans.The Republic's "oxygen pass" expired at 1pm, with hourly PM2.5 entering the elevated band (56 to 150µg/m3) again in all five regions.Through the afternoon, prevailing winds continued to bring...
If you are looking forward to outdoor activities over the weekend, after seeing better PM2.5 and PSI levels across Singapore on Friday (Oct 23) morning , you may have to adjust your plans.
The Republic's "oxygen pass" expired at 1pm, with hourly PM2.5 entering the elevated band (56 to 150µg/m3) again in all five regions.
Through the afternoon, prevailing winds continued to bring smoke haze from Sumatra towards the city state.
At 6pm, concentration readings remained in the elevated band, ranging from 70µg/m3 to 98µg/m3 in the central region.
Meanwhile, 24-hour Pollutant Standards Index (PSI) was in the unhealthy range in western (108) and central (102) Singapore, while remaining in the moderate range in the northern (85), eastern (89) and southern (89) regions.
The National Environment Agency (NEA) said smoke haze from Sumatra was observed drifting towards Singapore.
Smoke haze was also observed over Kalimantan, it added.
Haze and weather outlook
In its daily haze situation updated issued on Friday evening, the agency said showers are forecast over Singapore and the surrounding region.
But it cautioned that smoke haze may still be transported towards Singapore from Sumatra under the prevailing south-southeasterly or south-southwesterly winds.
PSI is forecast to be between 90 to 140 — in the moderate to unhealthy range.
NEA added that winds are expected to turn to blow from the southwest or west from Sunday onwards, which, it said, may reduce the smoke haze transported to Singapore.
Members of the public should check the latest hourly PM2.5 readings before participating in outdoor activites.
如果您期待在周末进行户外活动，那么在看到周五（10 月 23 日）早上新加坡 PM2.5 和 PSI 水平有所改善后，您可能需要调整您的计划。
共和国的“氧气通行证”于下午 1 点到期，所有五个地区的每小时 PM2.5 浓度再次进入高位区间（56 至 150µg/m3）。
整个下午，盛行风继续将苏门答腊岛的烟雾吹向这个城市国家。
下午 6 点，浓度读数仍处于较高水平，中心区域的浓度范围为 70µg/m3 至 98µg/m3。
与此同时，新加坡西部（108）和中部（102）的 24 小时污染物标准指数 (PSI) 处于不健康范围，而北部（85）、东部（89）和南部（89）地区则处于中等范围。
国家环境局（NEA）表示，观测到来自苏门答腊的烟雾正向新加坡飘去。
报告还指出，加里曼丹岛上空也出现了烟雾。
雾霾和天气展望
该机构在周五晚间发布的每日雾霾情况更新报告中表示，预计新加坡及周边地区将有阵雨。
但该机构警告说，在盛行的东南偏南风或西南偏南风的影响下，烟雾仍有可能从苏门答腊岛吹向新加坡。
PSI 预计在 90 到 140 之间——属于中度至不健康范围。
新加坡国家环境局补充说，预计从周日开始，风向将转为西南风或西风，这或许可以减少输送到新加坡的烟霾。
公众在参加户外活动前，应查看最新的PM2.5每小时读数。