JEDDAH —The National Center for Meteorology (NCM) issued a red alert for dense fog in Asir alongside orange alerts for moderate rainfall in Qassim and fog in Jazan and Riyadh on Monday. The red alert in Asir covers Abha, Ahad Rufaydah, Al Namas, Balqarn, Tanomah and Khamis Mushait, warning of dense fog and visibility dropping to one kilometer or less. The alert was in effect from 1 a.m. to 8 a.m. In Qassim, an orange alert was issued for moderate rainfall from 10 a.m. to 10 p.m., covering Abanat, Al Khabra, Al Rass, Al Fawwarah, Al Nabhaniyah, Riyadh Al Khabra, Dariyah and Uqlat Al Suqur. The NCM warned that the rainfall could be accompanied by strong winds, near-zero visibility, hail, flash floods and thunderstorms. Meanwhile, an orange alert for fog was issued in Jazan, covering Al Harth, Al Dair, Al Reeth, Al Aridah, Al Eidabi, Fayfa and Harub, from 1 a.m. to 8 a.m., with visibility expected to drop to between one and three kilometers. In Riyadh region, an orange alert for continued fog covered Al Zulfi, Al Ghat, Al Majmaah and Shaqra from 1 a.m. to 10 a.m., with visibility also expected to fall to between one and three kilometers. In its daily weather forecast, the NCM predicted moderate to heavy thunderstorms accompanied by hail and active winds across parts of Jazan, Asir and Al Baha, potentially causing flash floods. Light to moderate rainfall was also forecast for parts of Makkah and Riyadh regions, while active winds could raise dust and sand, reducing visibility in several areas. The center also warned of possible fog formation in parts of the affected regions.