Temps have already plummeted across Southeast Texas, but the main story will be the chance of significant snow and ice later this week.

HOUSTON – Thousands of runners and walkers take to the streets of Houston this Sunday. Temperatures at the starting line will be in the mid-30s but it will feel like the upper-20s with the wind chill. Temperatures will warm to the lower-40s through the morning under sunny skies. It was actually colder last year.

Southeast Texas' outlook for next week's winter storm continues to worsen, with a growing likelihood of a deep freeze and substantial wintry precipitation, snow and sleet in the Houston area. Space City Weather's Eric Berger published an atypical afternoon report on Friday warning of an "increasingly likely" and drastic mix of hard freeze and snowy conditions expected in Southeast Texas early next week.

The watch is in effect from Monday evening through Tuesday afternoon. Heavy accumulations of sleet and snow are possible.

A winter storm that is expected to begin in Texas next week could end up bringing snow and ice to parts of Florida, but the forecast is far from a lock.

A blast of cold air is expected to move into Houston on Sunday, and we could see snow and ice early next week. Here's our forecast.

A rare winter storm is expected to bring heavy snow, sleet and freezing rain to Florida, Texas and other parts of the South next week. While some uncertainty remains over exactly how much snow will fall,