National Weather Service United States Department of Commerce
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Last Map Update: Tue, Jan. 16, 2018 at 5:39:24 am CST

National Weather Service Shreveport, LANational Weather Service Jackson, MississippiNational Weather Service NWS Birmingham, Alabama
National Weather Service Lake Charles, LAZoom
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National Weather Service Mobile/Pensacola

The winter weather advisory has been expanded in area to include locations as far southeast as Houma, metro New Orleans and the Mississippi Gulf coast. A light wintry mix of sleet, snow and freezing rain is possible, starting in areas of east central Louisiana to the north of Baton Rouge into southwest Mississippi around midday or early this afternoon. The chance for this mix of frozen and freezing precipitation will then reach areas just north and west of Lake Pontchartrain late this afternoon, and areas along the Mississippi Gulf coast and just south and southwest of Lake Pontchartrain this evening. Accumulations of sleet and snow of a trace to just under an inch is possible along with some glazing from light freezing rain in the advisory area. All precipitation is expected to end by midnight tonight, however very cold temperatures well below freezing means any moisture from precipitation will turn to ice, especially on bridges and overpasses.
Another Arctic airmass is on the way and this will bring frigid temperatures to the area once again. The Arctic cold front is expected to move through the area during the morning hours and should be in the Gulf by early afternoon. Once the cold front moves through look for temperatures to drop quickly. Portions of southwest MS will drop below freezing before noon and likely remain below freezing for over 24 hours. Lows Wednesday morning will range from the mid teens in southwest MS to around 20 along the 10/12 corridor, to the lower to mid 20s south of I-10, except for upper 20s to lower 30s along the immediate southeast Louisiana coast. With brisk north winds expected, wind chill values will fall into the single digits to around 10 degrees by late tonight into Wednesday morning. People, pets, pipes and plants will need to be protected.
Another strong Arctic cold front will move through the central Gulf region this morning, and this could bring a light winter mix of precipitation to the northern and western portions of the area this afternoon and some more southeastern areas near Lake Pontchartrain and the Mississippi Gulf coast this evening. Temperatures will quickly fall behind the front and some locations across southwest MS and east central Louisiana will likely be below freezing before noon today. A continued drop in temperature is expected to bring the freezing and below line as far south and east as areas just north and west of Lake Pontchartrain by late afternoon and most of the remainder of the area in the evening. Minor accumulations of snow and sleet of a trace to just under an inch will be possible across areas north of a line from Houma to metro New Orleans to the Mississippi Gulf coast, and some icing could also occur from any light freezing rain that falls. Another couple nights of hard freeze and freeze conditions expected tonight and Wednesday night, and brisk winds tonight will create very cold wind chill readings as low as the single digits to around 10 degrees late tonight and Wednesday morning.
Climate data for January 16th.


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