四月的藍天 Azure Sky in April

四月的藍天
　
四月，春天，潮濕，霧氣繚繞的季節。不是應該如此的嗎?

四月中旬，氣溫已長時間徘徊在26-28℃之間，正準備接受夏日已提早降臨之際，一道冷鋒昨晚忽然又殺到，兩股冷暖氣流互撞，氣溫在一小時內驟降6℃，從28℃急跌至22℃。濕暖空氣急上升形成雲雨，更帶來雷暴，風雲突然變色，一陣狂風暴雨之下，中環出現風速80公里、如3號風球的陣風，大嶼山沙螺灣的陣風更一度逾時速100公里，如打8號風球。

今早醒來，明顯地涼了，吹起了清勁北風，天朗氣清，陽光普照，現出了不常見的藍天。今天要外出工作，路上見到頭上一片藍天，忍不住拿出照相機來拍了幾張。天氣報告顯示下午的相對濕度只有百分之26，並發出了「火災危險性極高」的紅色訊號，是自有紀錄以來第二最乾燥的四月。

我的天，想不到秋天又回來了。


Azure Sky in April

Spring time, humid and misty…Shouldn't that be normal in April?

We have had a long warm period of 26-28°C in mid-April this year. Just thinking that we have an early arriving summer, a northern cold front suddenly appeared last night. The collision between the warm and cold air flows caused not only a rapid drop of 6°C within an hour (from 28 to 22°C), but a thunder storm due to the huge mass of cloud formed by the rapid ascent of the warm and humid air. Strong wind of 80lm / hr appeared in the Central district, which was usually recorded only when the Typhoon Signal no. 3 was hoisted. The wind was even stronger in Sha Lo Wan of Lantau Island, 100km / hr, equivalent to the situation under Typhoon Signal no. 8.

The air was obviously much cooler when I woke up this morning. It was sunny, and the sky was unusually clear and blue under the influence of the northern wind. The sky was so blue that I could not help taking out my digital camera and take pictures. The weather report indicated that the relative humidity was at a recorded low of 26% in April, so dry that a Hill Fire Hazard Warning Signal of "Extremely High" was issued.

Good Heaven, I didn't expect that Autumn had come back again so soon.