In brief: Watch for areas of flash flooding over the next few hours as Bertha’s downpours press through the Houston region. Stage 1 or low-end 2 type flooding is expected in the impacted areas.
A flash flood warning is posted for portions of southwest Harris and Fort Bend County until 9 PM, as some bands of torrential downpours have pushed through the area. They are very slowly drifting north and west, but have dumped as much as 4 inches of rain over Missouri City in the last couple hours.
I would expect the flood advisory to eventually be expanded north and west as heavy downpours impact other parts of Harris and Fort Bend Counties, and another flash flood warning can’t be ruled out either. Watch for areas of street flooding over the next few hours, especially west of I-45. We should see storms and downpours peak over the next 2 to 3 hours and settle back down after 9 to 10 PM or so. Again, the core of the heaviest rain may slowly lift north and west, which should hopefully keep flooding from going beyond Stage 1 or perhaps low-end 2 in those areas.
Bertha itself has made landfall east of Houston and will continue off to the west or west southwest through the night and tomorrow.
