From NWS Lake Charles:
The National Weather Service in Lake Charles is monitoring Tropical Depression Harvey, which is expected to become a tropical storm today or tonight. Harvey will move northwest across the Gulf and make landfall on the central Texas coast late Friday night or Saturday morning as a strong tropical storm or weak category one hurricane. After landfall, it will meander in that region, which will result in heavy rains and floods for parts of Texas and even Louisiana.
For our region, we are forecasting 10 to 15 inches of rain for southeast Texas and southwest Louisiana Friday through this weekend into early next week. For central and south central Louisiana, we are forecasting 7 to 10 inches of rain. In the stronger rain bands, there could be isolated pockets of over 20 inches of rain. This will cause flooding across the region. Stay tuned for flash flood warnings or emergencies when they become necessary this weekend and/or early next week.
In addition, there will be 1 to 3 feet of storm surge above ground level in parts of southeast Texas and southwest Louisiana, and 1 to 2 feet in south central Louisiana. The timing of this surge will likely be tied in with the high tides Friday evening and Saturday morning.
High winds and/or isolated tornadoes are a smaller risk for this system.
Since Tropical Depression Harvey is still weak, forecaster confidence on the exact timing and location of the rain and surge is still on the low side. Stay tuned for updates as we continue to monitor this event.