A Cold front just to the NW will move through south Mississippi by midday with cooling temperatures this afternoon. We will actually see two periods of precipitation with this event. Showers associated with the cold frontal this morning and early afternoon, followed by another surge overnight. Precipitation is expected to linger through at least Wednesday morning before pushing south of the Interstate 10 corridor.
Another disturbance will move rapidly across the country on Thursday, and will return the threat of rain to the area by Thursday afternoon/night.
Frontal passage today at any location will be followed by a 10-15 degree drop, so calendar day highs near and northwest of McComb and Baton Rouge could actually occur prior to sunrise today. Cold air advection blowing across Lake Pontchartrain will produce gusty winds behind the front, but the forecast at this time is for conditions to remain just below Wind Advisory criteria. Beyond Friday morning, forecast confidence diminishes rapidly as medium range models significantly disagree on timing of another disturbance.