Rio Grande Valley:
South winds throughout the day today brought warm temperatures up to the lower-to-mid 80s. Tonight, watch out for patchy fog in areas, late night, with lows in the lower 50s.
(12/17): Expect a change in winds, temperature and cloud cover for Friday as a cold front is scheduled to pass through the Valley early Friday morning. Though this front will bring cloud cover, there is not enough moisture in the upper levels of the atmosphere to spark any rain. If anything does precipitate, it will most likely be a light rain or a mist. Overall, don’t expect any significant amount of rain. Highs will be in the mid 60s with winds out of the north northeast at 10-15 mph.
(12/18): Saturday looks to be like a beautiful day. Clouds will clear for the most part, leaving mostly sunny skies for much of the day. Afternoon highs will be in the mid 60s with winds out of the north northeast at around 10-15 mph, with minimal humidity. Saturday night will be on the chilly side with clear skies and lows ranging from mid 40s in the lower Valley to upper 30s in the upper Valley.
(12/19): Sunday, a slight warm up is expected with afternoon highs in the lower-to-mid 70s throughout the Valley. Clear skies, along with light east southeast winds are also in the forecast for Sunday. Because of the wind shift, Sunday night won’t be as chilly as Saturday night, with temperatures staying in the mid 50s.
Rest of the Nation:
The area of low pressure that is associated with the cold front moving through the Valley is currently over the Appalachian Mountains, along the border of North Carolina and Tennessee. This low is responsible for snow and ice accumulations throughout the Tennessee Valley. The system will continue to push out of the states by later tonight.
A shortwave trough that is located around the 4-corners of the United States will generate snow for the panhandle of Texas as well as western and northwestern Oklahoma for tomorrow. 2-3 inches of snow is expected to fall in the panhandle of Texas, early morning. Central Oklahoma is also expecting some snow tomorrow, anywhere from half an inch to an inch.