41. Some high clouds spread into Idaho and Montana. 42. A few high clouds will dim the sun Monday afternoon over the northwestern Great Lakes. 43. From there they watched the half-mile high clouds of dust the detonations created. 44. The southern Plains will remain quite mild with a mixture of sunshine and high clouds . 45. The rest of the Northeast will be cool with sun shining through variable high clouds . 46. Some high clouds will dim the sun over northern New England and upstate New York. 47. Winds blowing offshore over northwest Washington will allow some weak sun through gathering high clouds . 48. A stream of high clouds will block the sun in the Southwest and central Rockies. 49. A high clouds structure above the Queens Sports Ground as play began also threatened rain. 50. Meanwhile, sunshine will give way to high clouds across the southern Appalachians and Southeast coast.