NEW ORLEANS (WGNO) – After a lull in activity this afternoon throughout most of the area, another round of isolated rain and thunderstorm activity builds in for the evening and night. Some of these storm will have the capability to produce heavy rainfall. Impacts from today/tonight’s weather will not be the same across SE LA. Some locations will get little to nothing… others could get a few inches of rain.
Let’s break it down… Over the past 24 hours, rainfall totals have varied significantly across the area. Near Galliano has seen 3.5 inches so far today, the north shore has seen close to 1 inch, trace amounts on the south shore, and a whopping 7 inches just north of Baton Rouge. Although some of the rainfall totals may have been overdone for much of the area, the forecast for earlier this week did check out in some spots where heavy thunderstorm activity set up today.
Moving foreword… With more rainfall in the forecast for tonight, areas that have already received a good soaking so far today may be more prone to flash flooding due to pre-saturated grounds. There are currently several flash flood warnings issued near Lafayette and Baton Rouge. Locally no flash flood warnings, but rainfall is getting heavier on the north shore with a hefty thunderstorm passing though as of 5 p.m.
A flood advisory is issued for St. Charles and St. John The Baptist Parish indicating the risk for minor flooding in low lying areas, and locations with poor drainage. This is in effect until 7 p.m.
Towns and cities that should be on the lookout include: Laplace, Reserve, Hahnville, Montz, Killona, Taft, Edgard, Norco, New Sarpy, Destrehan, Garyville, St. Rose and Luling.
A flood watch (green) is issued for all of SE LA until tomorrow morning. This means there is the possibility that slow moving thunderstorms could drop several inches of rainfall in a short amount of time creating for excessive runoff in flood prone areas.
Around 2 a.m. we are expecting additional thunderstorm activity to move in from the gulf. Impacting our coastal communities early Sunday morning.
That drifts northward overnight and into the daylight hours.
Isolated shower activity may be seen up until about lunch time tomorrow. These will be low impact rain chances.
Although the afternoon isn’t a 0% chance of rain type of set-up… it is more than safe to say that we stay mostly dry, and any events should go about their schedule.
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