11.   As a result, marked day-to-day temperature changes will occur across these regions through midweek.

12.   Behind the front, very cool, unsettled weather with patchy rain and mountain snow will occur across the northwestern states and the northern Rockies.

13.   A few gusty thunderstorms will occur across the northern Rockies as a cool front pushes through western Montana.

14.   A radio report said an explosion had occurred across the street from the federal building.

15.   A wave of construction of new courthouses, and repairs or expansions of existing ones is occurring across the country.

16.   But blood shortages, though they can occur across the country, rarely affect trauma units.

17.   But ornithologists and other bird specialists say the Chatham roost is just an extreme example of a crow trend occurring across the continent, from Massachusetts to British Columbia.

18.   But the losses occurred across the country as well.

19.   But the researchers said it was significant that they occurred across all three programs.