With a band of precipitation moving in at around 2pm, we are getting reports of light sleet across the southshore. Reports have been coming in from Norco, Kenner, Metairie and right here outside WWL studios in the French Quarter.

Sleet is a form of frozen precipitation. It can occur two ways. Today it looks as though rain in the middle levels of the atmosphere may have changed over to sleet through evaporational cooling as it fell through a dry layer of air in the lower atmosphere.
Sleet can also form if there is really, really cold (below freezing) air in the upper levels of the atmosphere, but a warm layer of air in the middle of the atmosphere. The precipitation falls as snow, then it partially melts as it falls through a layer of air that is above freezing, then it refreezes in a layer of subfreezing air before it reaches the surface.

For tonight, we could have problems on overpasses on the northshore. With temperatures below freezing in some areas, precipitation falling in the overnight could provide light rain mixed with sleet on the northshore. Also, we may have icing on overpasses.

Northshore parishes near the Mississippi State line could see temperatures below freezing for several hours overnight... you want to protect tender vegetation if you haven't already done so.

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