Some areas of Texas are going to get some serious temperature drops on Sat. Houston for example is going to set a record high of 80F on Saturday but by Sunday morning will be at 32F or less.

Most places are going from Summer weather to winter within a few hours...infact forecasters are saying within 20 minutes the temp will drop 50F. Would love to see that happening!

Yeah the swings are incredible sometimes. This one is certainly drastic even for them, but still a tropical gulf coast city will be below freezing both Sunday and Monday nights. Us meanwhile? Above.

Snow has set in across southern Ontario this evening associated with our second Colorado low of the week. Likely snowfall amounts south of Toronto in the 5-10cm range but double that up towards areas around Georgian Bay. Briefly turning to rain on Saturday as a warm front skirts across but another sharp Arctic blast on Sunday with temps falling away to overnight -15 to -20.

Meanwhile the Maritimes have had blizzards and face more followed by a switch to plus 10C on Sunday.

It not nice when to get snow then turning to rain then get colder which can be frustrating if you want to see snow direct from start to end and leaving a beautiful snowy landscape and sunny skies afterward.  

Houston isn't a tropical city - and its record low is -15C. 32F isn't particularly uncommon.

I know someone who lives in Philadelphia, and he absolutely hates the wild temperature swings. He says Europe is lucky in that regard, and he thinks it's great that so many places in England can grow subtropical plants that would probably be killed in the gulf states.

26C in Corsicana, about 50 miles SW of Dallas at 15:55 local time, and -1C in Decatur about 50 WNW of Dallas at the same time - the extreme temp swings down there certainly in evidence!

This sums up the temp change:

https://twitter.com/KHOUBlake11/status/810234798476263425

306 miles seperates 27C and -13C.

I don't begrudge the Americans their cold weather and snowy Christmases.

But I do consider it unfair that, instead of exporting some cold air to this side of the Atlantic, all they do is use the temperature gradient to fire up the jet stream and condemn us to weeks of wind and rain from the west.

54% of North America had snow cover as of yesterday compared to 36% last year. Temps are set to rise as the week goes on and most states will be enjoying a green Christmas by the looks of it.

Chicago was in single digits on Sunday and a low of -15F. By Saturday night, temps are projected to be 46F with potential for storms and rain. A big contrast on the last 3 weekends of snow for sure.

Of course let us hope that improves our chance of cold weather.

Blimey! Had to dig deep for this thread.

Heavy rain & snow-melt in California leads to evacuation of area downstream of a damn that's in trouble due to the volume of water flowing over it.

http://www.bbc.co.uk/news/world-us-canada-38952847

I guess it's a case of trying to store as much water as possible for the water authorities in the California region, but does this mean that the Californian drought, which had been becoming increasingly serious, is now relaxed?

To add, Mammoth, in Central Cali, has had the most snow in a January since records began - a gargantuan 246" (20 feet).

Overall 430" for the season; not a record, but there's still over a month & half to go. The record was 668" set in 2010/11, but since then, each year has had below average - the worst being 2014/15, where only 176" fell, the second lowest on record, behind only 1976/7, where just 94" fell. Course, everything's relative!