Many Yemeni provinces are expected to see variably-heavy rains, the national meteorology center forecasted on Sunday, warning against spread of sand in six provinces in the next 24 hours.Heights of Sa'ada, Hajjah, Mahweet, Raymah, Dhamar, Ibb, Taiz, and Lahj governorates are expected to witness thunder rainfalls of variable heaviness, the center added in daily publication seen by Saba.Tehama Plain and coasts of Taiz, Hodeida, Hajjah, Lahj and Aden would also see rainfalls of variable heaviness, sometimes with thunder, according to the publication, as the heights of Sana'a, Amran, Baydha, Marib, Jawf, Hadhramout, Abyan and Shabwa governorates would likely be rained.The center warned against wide spread of sand in the governorates of Jawf, Amran, Hajjah, Sa'ada, Sana'a and Dhamar.Source: Yemen News Agency