Invest 90-L: Heavy Rain and Flood Threat Looms Over Louisiana and Mississippi

Invest 90-L is an area of disturbed weather with a medium, 60% chance of developing into a Depression or Tropical Storm Arthur.

Regardless of tropical storm formation, the system, combined with a slow-moving June front, poses a significant flash flood threat across Louisiana and Mississippi.

Rainfall totals are expected to range from 3 to 6 inches over the next five days in most areas, but isolated hot spots could see over a foot of rain if the system moves closer.

A Flood Watch is currently active for the Northshore, River Parishes, portions of the Bayou Parishes, and the metro area through 7 AM Friday.

Why this matters: These heavy rainfall amounts can quickly lead to dangerous flash flooding, impacting transportation, property, and daily life. Residents in flood-prone areas must take proactive measures to protect themselves and their belongings.

Tuesday (June 16): Scattered downpours throughout the day, becoming heavier on the Northshore after 3 p.m. Isolated downpours overnight.

Wednesday: Lighter morning showers, turning to hit-or-miss conditions throughout the day, then becoming heavier in the evening and overnight as Invest 90-L approaches.

Thursday: The heaviest rain is anticipated in the morning, with more heavy downpours possible throughout the afternoon.

Northshore and South Mississippi: Expected to receive 5-10 inches of rain, with locally higher amounts.

River Parishes and Metro Area: Forecasted for 3-5 inches of rain.

Bayou and Coast: Predicted to see 1-3 inches of rain.

Stay Informed: Monitor local weather advisories from trusted sources.

Secure Property: Bring in or tie down outdoor furniture and other items that could float away.

Clear Drains: Ensure gutters and storm drains around your property are clear of debris to allow water to flow freely.

Emergency Kit: Have an emergency kit ready with essential supplies, including water, non-perishable food, flashlights, and a first-aid kit.

Evacuation Plan: Know your evacuation route and have a designated meeting place if you need to leave your home.

Never Drive Through Floodwaters: "Turn around, don't drown" is a critical safety message. Even shallow water can hide hazards or stall a vehicle.

Q: What is Invest 90-L?

A: Invest 90-L is an area of disturbed weather in the Gulf of Mexico that the National Hurricane Center is monitoring for potential tropical development. "Invest" is short for investigation area.

Q: What is the likelihood of it becoming a tropical storm?

A: There is a medium, 60% chance of Invest 90-L developing into a tropical depression or Tropical Storm Arthur.

Q: What does a Flood Watch mean for me?

A: A Flood Watch means that conditions are favorable for flooding to occur in your area. It is a time to prepare and be ready to take action if a Flood Warning (meaning flooding is happening or imminent) is issued.

Q: Which areas are expected to get the most rain?

A: The Northshore and south Mississippi are projected to receive the highest rainfall totals, potentially 5-10 inches, with isolated areas possibly exceeding a foot.

Be Prepared: Heavy rainfall and flash flooding are imminent across much of Louisiana and Mississippi this week.

Stay Updated: Continuously check local weather forecasts and advisories for the latest information and any changes in the storm's path or intensity.

Safety First: Prioritize your safety and the safety of your family. Do not attempt to drive or walk through floodwaters.

Community Impact: Understand that widespread flooding can impact infrastructure, utility services, and transportation. Plan for potential disruptions.

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