91.   By Monday, this disturbance will ignite a low pressure system as it pivots into the Southeastern states.

92.   By Saturday morning, the arriving jet stream disturbance will foster a deep low pressure system over the Gulf of Maine.

93.   Chilly Canadian gales will buffet parts of the Great Lakes on Saturday in the wake of a formidable but weakening low pressure system over Ontario.

94.   Clouds circulating around a low pressure system stalled over the Canadian Maritimes will cover parts of northern New England as far south as Boston.

95.   Clusters of thunderstorms will flare over parts of the western Gulf States as an upper-level low pressure system stalls over Louisiana.

96.   Cold air will continue to be driven south into the central and eastern United States by the circulation around an expansive low pressure system over southeastern Canada.

97.   Cold air will drain into the Northeast from a high pressure system in eastern Canada, providing an unseasonable, low-level chill.

98.   Clipper is the nickname for fast-moving low pressure systems that dart across southern Canada and the northern United States in winter.

99.   Cool air will press southward into the northern Great Lakes and the upper Mississippi Valley as a Canadian high pressure system builds into the region.

100.   December will get a fast start on rain as a moist Pacific low pressure system presses slowly inland Friday.