An "Alberta clipper" gets its name from 19th century ships, and originates in Canada east of the Canadian Rockies.

Nice start to the week but we need to watch a few systems Tuesday through Thanksgiving Day and Friday. Monday will bring partly sunny skies and pleasant weather with temperatures near 50. Tuesday will start dry but end wet with some rain in the afternoon and evening.

The KHOU 11 Weather Team issues a Weather Impact Alert for Monday due to potential isolated tornadoes and damaging winds affecting holiday travel.

Our next weather system will bring mountain snow along with valley snow or rain/snow Sunday night into Monday. Cooler and active weather sticks around next week.

Three weather systems – including the newly-formed Tropical Depression Verbena – are affecting the country and will bring cloudy skies and rains, as well as rains with gusty winds on Monday, the state weather bureau said.