Winter Makes a Comeback
After temperatures in the upper 60s and 50s this week it's hard to believe we will see such a chilly weekend with the chances for yes, some wintry precipitation.
We've had our eye on this system all week but it has been a bit of a tricky one. The system has become "cut-off" over southern Plains so timing has been difficult to nail down. Needless to say our forecasting models have also been in a big disagreement with the system. Then there was also the possibility of another cold air damming setup for the Valley. That's when Canadian high pressure brings in chilly northerly winds, coupled with a low pressure system pumping in a north easterly winds and the cold air gets trapped in the Valley.
So what are we actually looking at now? Well things have started to come together a bit more. We're now looking at some rain developing late Saturday afternoon and into the evening.
Here's the problem, when you have temperatures dropping into the 30s well a degree or two can make a huge difference! And that's the problem we are looking at.
We are all confident that there will be a change from rain to snow, and that would take place overnight Saturday into early Sunday morning.
How long it stays as snow will of course depend on temperatures. It really looks like we could see the cold air damming (CAD) setup for Sunday which would likely hold temperatures down, and many areas would struggle to make it into the upper 30s, especially for the Northern Valley, meaning more wintry weather.
The southern Valley has a better chance of everything remaining mostly rain with less of a snowy mix.
Because temperatures have been so warm lately we're hard pressed to see much accumulation on roads, especially with a changeover from some rain showers. But it is likely to accumulate especially on grassy surfaces. Right now accumulations would be minor but this system is likely to change at the last minute unfortunately. Right now we are thinking a couple inches is likely for higher elevations as well as the northern Valley. But at least an inch is possible in the majority of the Valley but those numbers could go up quickly. So keep an eye on the weather this weekend, and Sunday is just a good day to stay inside and watch the Superbowl! Another concern, black ice and slick roads for Sunday night and early Monday morning.