11.   I felt mildly disappointed as a formation of rain clouds sailed in and obscured the sun.

12.   However, during the late morning and afternoon clouds will occasionally obscure the sun.

13.   Patches of cumulus clouds will obscure the sun at times near the southern Appalachians as the uneven heating of the undulating terrain encourages ascending currents of moist air.

14.   Skies will be mainly sunny across the region, though filaments of clouds will obscure the sun at times near the Rockies.

15.   Stubborn low, gray clouds will obscure the sun throughout the Great Lakes and portions of the interior Northeast.

16.   They had a handy backup when the clouds obscured the sun while lighting the Olympic flame in Athens.

17.   A thick haze was hanging over Hong Kong early yesterday, cutting visibility and obscuring the sun.

18.   On Tuesday, as four helicopters flew high over Grozny, the sun was partly obscured by black smoke pouring out of fires raging in the city.

19.   A thick pall hung over Hong Kong on Tuesday, cutting down visibility and obscuring the sun.