According to the National Center for Meteorology, gusty winds will blow and moderate to heavy rain accompanied by hail may fall in parts of Jazan, Najran, and Aseer. Thunderclouds may form in parts of Al-Baha and Makkah regions, as well as the southern parts of Riyadh and Eastern regions (Empty Quarter Desert). Fog may form during the night and early morning in the Eastern Region and Aseer. Winds over the Red Sea will be northerly to northwesterly, at speeds of 15-40 km/h in the northern and central parts, and westerly to northwesterly, at speeds of 10-50 km/h in the southern part. Waves may reach from one to two meters, and the sea will be relatively calm to choppy. In the Arabian Gulf, winds will be southeasterly to northwesterly, reaching 12-38 km/h in the northern part, and northwesterly, reaching 8-30 km/h in the southern part. Waves may range from one to one and a half meters, and the sea will be relatively calm Source: Saudi Press Agency