Arctic cold front coming for New Year's Eve

Grab your thickest coat!

SAN ANTONIO - The end of 2017 plans to be a cold and blustery one. There's a chance of frozen precipitation New Year’s Day on top of the big chill.
 
Saturday will be a fairly pleasant day. After some morning patchy fog, we can expect partly cloudy skies, and high temperatures finally close to normal in the upper 50s and lower 60s. The wind could become a bit breezy in the afternoon ahead of a cold front. That cold front will slide through south-central Texas late Saturday afternoon into Saturday night.
 
On Sunday, behind the cold front, the wind will switch from the south to the north and northeast and will become gusty. The colder temperatures will lag behind the front by about 12 to 18 hours. Temperatures Sunday will start out in the 40s for the Hill Country, and the upper 40s and lower 50s for San Antonio and points south. Temperatures will fall through the 40s during the day, ending up around freezing for the Hill Country by nightfall and in the upper 30s for the rest of the area. The wind Sunday could gust as high as 25 to 30 mph. A few showers could develop behind the front Sunday, but moisture will remain somewhat limited during the daytime.


 
During the overnight Sunday night, which is New Year’s Eve, temperatures will drop into the middle and upper 20s for the Hill Country, and the upper 20s to around 30 degrees for the rest of South Texas. Some moisture is expected to move back into the area, likely after midnight. Because temperatures aloft will be above freezing, and temperatures at the ground will be slightly below or around freezing, any rain or drizzle that falls will likely start off as plain rain or drizzle higher up from the ground, then some could freeze upon reaching the surface as freezing rain or freezing drizzle.

The highest likelihood for any frozen precipitation will be in the Hill Country, with bridges and overpasses being the primary concern. Towards San Antonio the chance of frozen precipitation will be lower due to lack of moisture, however, it is not out of the question.
 
Some computer models keep that moisture around through New Year’s Day, with temperatures struggling to rise through the 30s for highs.

For the Hill Country, temperatures may remain below freezing the entire day on Monday.

For San Antonio and points south, we should see temperatures topping out in the middle to upper 30s Monday afternoon. It will also remain windy, with wind chills well down into the 20s throughout the day.
 
Tuesday will see the moisture move out, but it will remain cold with highs again in the 30s. Temperatures will moderate as we head into the middle of next week.
 
This forecast is a tricky one and quite fluid, so keep checking back here on KENS5.com, and on each of our newscasts for updates.

© 2018 KENS-TV


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