Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest
An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >
| NWS Forecast for: Lake Pontchartrain (GMZ531) Issued by: National Weather Service New Orleans/Baton Rouge, LA Last Update: 535 AM CDT Thu Jun 18 2026 | |
Today: Southwest winds 15 to 20 knots with gusts up to 30 knots. Seas 3 to 4 feet, occasionally to 5 feet. Showers and thunderstorms likely early this morning, then a chance of showers and thunderstorms late this morning and afternoon. Tonight: Southwest winds 10 to 15 knots. Gusts up to 25 knots in the evening. Seas 2 to 3 feet. A chance of showers and thunderstorms in the evening. Friday: Southwest winds 5 to 10 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms in the afternoon. Friday Night: South winds 5 to 10 knots. Seas around 2 feet in the evening, then 1 foot or less. A chance of showers and thunderstorms. Saturday: South winds 5 to 10 knots. Seas 1 foot or less. A chance of showers and thunderstorms. Saturday Night: South winds 5 to 10 knots. Seas around 2 feet. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Sunday: Southwest winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Sunday Night: South winds 10 to 15 knots. Seas 2 to 3 feet. Monday: Southwest winds 5 to 10 knots. Seas around 2 feet. Monday Night: Southwest winds 5 to 10 knots. Seas around 2 feet. winds and seas higher in and near thunderstorms. | |
| Zone Forecast: Lake Pontchartrain (GMZ531) | |
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