Tropical Storm Chances Increasing
6/16/2026 (updated throughout day) – At 10AM EDT today, the National Hurricane Center (NHC) issued Potential Tropical Cyclone Advisory #1 for the 2026 hurricane season. At 4PM, NHC predicted the center of a tropical storm would pass Galveston around mid-day on Wednesday, 6/17/26.

Infrared satellite images show a wide band of deep tropical moisture building parallel to the coast.

According to Jeff Lindner, Harris County’s meteorologist, while the chances of tropical storm formation are increasing, if one does form it will likely be weak and short lived.
However, the potential for very heavy rainfall and flash flooding remains. The National Weather Service predicts a moderate risk of excessive rainfall and flash flooding today and Wednesday.
Guidance for the track of of any tropical storm that may develop remains uncertain due to the weak and broad structure of the system.
Today
Models predict thunderstorms will produce heavy rainfall near the coast and spread inland through the midday hours. How far inland remains in question, but areas south of I-10 look to have the best chances for heavy rainfall and flash flooding through the morning hours. Activity will likely decrease into the mid to late afternoon hours similar to yesterday.

Wednesday-Thursday
According to NHC, a tropical system will move ENE/NE parallel to the coast. And according to Lindner, a track near the coast or just offshore would focus the heavier rainfall south of I-10 on Wednesday and Thursday. Meanwhile, a track further inland would bring the threat for heavy rainfall into at least the I-10 corridor.
Rainfall Predictions
Lindner forecasts widespread rainfall amounts of 2-5 inches along and south of I-10 with isolated totals of 6-10 inches through early Wednesday.
Hourly rainfall rates of 2-5 inches will remain likely with the heavier storms. He believes this will lead to rapid onset flash flooding.
North of I-10 rainfall amounts of 1-3 inches are most likely through today. However, grounds are saturated and any rainfall will convert to runoff quickly.

River and Stream Forecast
Recent rains have caused rises on rivers. Lindner says that additional rainfall during the next 48 hours will potentially bring some watersheds to flood stage by late week. Most creeks and bayous across Harris County are doing well as of this evening with the exception of areas in NW Harris County up to the Woodlands. But intense rainfall rates tomorrow could result in significant and rapid rises.

At 6 PM Lake Houston was at 42.68 feet and releasing water near maximum capacity.
Lake Conroe is still at 201.23 feet and releasing only about 500 CFS.
Tides
Vacationers should watch coastal tides and rip currents. They will increase today into Wednesday as the tropical system moves into the Houston area. Current forecasts keep water levels 1-2 feet above normal (3-4 feet above barnacle level). Minor coastal flooding remains possible during high tide into Wednesday.
Winds
Winds will increase across the coastal waters and coastal counties today into Wednesday. Expect widespread 20-30 mph and gusts to 40 mph as seas build. Marine conditions will become hazardous as the coastal tropical system moves across the region.
Stay Weather Alert
For the latest information in fast changing situations such as this, consult the National Weather Service, National Hurricane Center and Harris County Flood Warning System. Stay alert and be prepared.
Posted by Bob Rehak on 6/16/2026
3213 Days since Harvey

































