Onion Creek at Twin Creeks Rd near Manchaca water level

What this means

Onion Creek at Twin Creeks Rd near Manchaca is well above normal at 6.58 ft.

The median for mid-October is 4.28 ft, based on 22 years of readings, so the river stage is 2.31 ft above typical. On the same day last year the reading was 2.43 ft, a difference of +4.15 ft.

It has risen 2.90 ft over the past 24 hours. If the rise continues, low-lying paths and riverside parking can go under water. In the last month it has stayed between 3.59 ft and 6.59 ft.

That stands out in fall, when many rivers are usually near their lowest.

Compared with 22 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date

4.28 ft2.31 ft above the median for this date

Normal for this date

3.51 ft – 4.96 ft8 years in 10 fall in this range (22 years of records)

Same day last year

2.43 ft+4.15 ft

Lowest and highest in 30 days

3.59 ft – 6.59 ft

Lowest and highest in 12 months

2.32 ft – 6.77 ft