Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
quran:54:19

Indeed, We sent upon them a screaming wind on a day of continuous misfortune,  

Indeed We unleashed upon them a clamorous wind, intensely noisy, on a day of prolonged ill fortune, (nahsin mustamirr means) either one of continuous ill fortune, or one of severe ill fortune — and this was the last Wednesday of the month —
القرآن:٥٤:١٩

إِنَّا أَرْسَلْنَا عَلَيْهِمْ رِيحًا صَرْصَرًا فِي يَوْمِ نَحْسٍ مُسْتَمِرٍّ  

{إنا أرسلنا عليهم ريحا صرْصرا} أي شديدة الصوت {في يوم نحس} شؤم {مستمر} دائم الشؤم أو قويه وكان يوم الأربعاء آخر الشهر.