Clear Skies and Another Cool Night

Posted: Updated:

Tuesday, December 18

12:30pm

Overview
Cold front continues to push over the Atlantic Ocean and has left a Ridge of High Pressure in its wake. This High Pressure is not strong and quick moving. There is a Low Pressure System moving over the Midwest and Great Lakes Region with a cold front stretched through the Central Plains. This front will move toward Cenla and cross over our area Wednesday night.

Discussion
High pressure is currently over Mississippi, Louisiana and the North Gulf of Mexico and headed Eastward. The ridge will continue to move East, and return flow will begin this afternoon. Temperatures will warm nicely throughout the day and into the lower to mid 70-s, from a chilly start. Wednesday, even warmer temps are possible. Those highs on Wed are expected to be in the upper 70-s and near record breaking (around 80 degrees for most of the area.
Moisture will also increase during Wed as an upper-level system crosses the Rockies and a surface low continues to develop along the Lee side of this mountain range.
Enough lift will be present for there to be a slight chance for severe weather Wednesday night and Thursday morning as the front quickly moves through Central Louisiana. The biggest threat will be with strong Straight-line Winds. The front will quickly race out of the area on Thursday morning with strong Cold Air Advection occurring through the day.
The high temperature on Thursday will most likely be a Midnight High. This means that the high temperature will be at midnight on Thursday. As the sun comes up, Cold Air Advection will usher a much cooler and more dense air mass into our area. This will make the temperature continue to drop even though the sun is up and attempting to warm the surface.
Return Flow will begin again Saturday as the second ridge of the month moves East. Rain chances will again increase on Sunday. This could lead to scattered rain for Christmas as a Low Pressure may begin to develop over our region.

For the rest of the day,
There is a weak ridge of high pressure anchored over the Lower Mississippi River Valley. This is allowing for clear skies and a light wind. So, expect plenty of sunshine with dry air, aloft. Today will be nice weather with mild temperatures that will be well above average for this time of the year. Overnight, expect cool conditions with some light cloud cover.

For the rest of the 7day planner
We will see a significant cold front push through the area Wednesday night, bringing a likely chance for rain and much colder air into the area. High pressure will anchor its self over the area for a few days and begin to move out as we get closer to Christmas.

TODAY...Sunny skies and a pleasant feel. Highs 68-75. South wind 2-12 mph.

TUESDAY NIGHT...Fair skies early followed by some in and out cloud cover and not as cool. Lows 45-51. S/SE wind 2-10 mph.

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~DEW