Flood watch, including in parts of the capital region, ahead of several showers

The National Weather Service has issued a ***FLOOD WATCH*** for the parishes of Ascension, Assumption, Livingston, St. James and Tangipahoa. It goes into effect at 6 a.m. Monday and lasts until noon Tuesday. A flood watch means conditions that could lead to flash flooding may develop. Flash floods are a very dangerous situation. Be on the lookout for threatening weather conditions and watch for subsequent announcements and possible warnings. Further information on flood protection can be found HERE.

A slow-moving storm system will produce several waves of showers and thunderstorms across the state through Tuesday. In general, 1 to 3 inches of precipitation is expected, with higher amounts in some locations. While not everyone will have problems, those who see the heaviest rain may see rainfall rates of 1 to 2 inches per hour. If this occurs, urban areas could experience flooding of streets and poor drainage.

Tonight and tomorrow: Occasional showers will continue to occur in the evening hours, and isolated to numerous activities are possible during the night hours. In response to the increasing instability as a warm front passes through, some rumblings of thunder cannot be ruled out after dark. Temperatures will slowly rise from mid to over 60 degrees on Sunday evening after the passage.

Rain showers are expected at times on Monday. While the exact location is still unclear, a strong axis of rain will form somewhere in southeast Louisiana. It’s not out of the realm of possibility for this to happen in areas east of Baton Rouge, such as Ascension, Livingston and Tangipahoa. In this region, excessive runoff can lead to nuisance standing water in common trouble spots, as well as flooding with poor drainage in urban areas. To take this into account, a flood warning is in effect from Monday 6 a.m. to Tuesday 12 p.m. (see above). Problems do not occur in all areas of the watch. Rather, the heavy rain axis is likely to form somewhere within the observation area. The risk of heavy rain appears to be low near and northwest of the capital. Look for a high in the low to mid 70s on Monday.

Next: There will be further showers and thunderstorms on Monday and Tuesday night. This time it could be closer to Baton Rouge. The rain will ease on Tuesday night, leaving sunshine for the middle of the week. However, the sunshine is accompanied by another chill. Thursday morning overnight lows will be in the frost/freeze range for many.

– Meteorologist Malcolm Byron

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