WHAT: MODERATE RISKof Excessive Rainfall/Flash Flooding
- The previous Flood Watch has been replaced by a Flash Flood Watch and expanded to include all of Southeast Louisiana and
WHEN: The heaviest rain is expected now through at least Saturday morning
WHERE: All of Southeast Louisiana and Southern Mississippi
- The area of greatest concern today will be generally along and south of the interstate 10/12 corridor.
- The area of greatest concern will gradually shift northwestward tonight and is expected to be generally be across areas northwest of the
I-12/I-55 junction by tomorrow (Friday)
CONFIDENCE: We are highly confident that heavy rain will impact the area, leading to at least an isolated flash flooding threat. We are less
confident in the exact locations of the highest rainfall and the upper bounds of the rainfall totals.
· Additional rainfall of 5 to 8 inches is expected for much of the area. Isolated higher amounts will be possible. This will bring storm total
rainfall (including yesterday) into the 7 to 10 inch range with locally higher amounts. Please note that this represents a slight upward
trend in the expected storm total rainfall from previous briefings.
· Locally heavy rainfall will likely lead to ponding of water in low lying areas and areas of poor drainage, and some flash flooding will be possible
in the areas that receive the most rainfall.
· Rises on area rivers can be expected and flood warnings will be necessary on several area rivers. Forecasts for specific rivers are available on
the Advanced Hydrologic Prediction Service web page. Please note that the river forecasts are still in the process of being updated for today and
some of the forecasts on this page may be outdated.