Big Blue River at Surprise
Critical Stages
6' - Action
7' - Flood
10' - Moderate
12' - Major
Latest Observation
Updated: 8:45 PM CST 12/15/25
Status: Minor
Stage: 7.41 ft
Flow: 1.43 kcfs
Forecast
Forecast not available for this location.
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 8:45 PM 12/15 | 7.41 | 1.43 |
| 8:30 PM 12/15 | 1.81 | 0.0156 |
| 8:15 PM 12/15 | 1.56 | 0.0015 |
| 8:00 PM 12/15 | 1.49 | 0.0003 |
| 7:45 PM 12/15 | 1.44 | 0 |
| 7:30 PM 12/15 | 1.41 | 0 |
| 7:15 PM 12/15 | 1.38 | 0 |
| 7:00 PM 12/15 | 1.36 | 0 |
| 6:45 PM 12/15 | 1.36 | 0 |
| 6:30 PM 12/15 | 1.35 | 0 |
| 6:15 PM 12/15 | 1.34 | 0 |
| 6:00 PM 12/15 | 1.35 | 0 |
| 5:45 PM 12/15 | 1.35 | 0 |
| 5:30 PM 12/15 | 1.34 | 0 |
| 5:15 PM 12/15 | 1.35 | 0 |
| 5:00 PM 12/15 | 1.35 | 0 |
| 4:45 PM 12/15 | 1.38 | 0 |
| 4:30 PM 12/15 | 1.4 | 0 |
| 4:15 PM 12/15 | 1.45 | 0 |
| 4:00 PM 12/15 | 1.49 | 0.0003 |
| 3:45 PM 12/15 | 1.44 | 0 |
| 3:30 PM 12/15 | 1.39 | 0 |
| 3:15 PM 12/15 | 1.4 | 0 |
| 3:00 PM 12/15 | 1.43 | 0 |
| 2:45 PM 12/15 | 1.47 | 0 |
| 2:30 PM 12/15 | 1.48 | 0.0001 |
| 2:15 PM 12/15 | 1.56 | 0.0015 |
| 2:00 PM 12/15 | 1.65 | 0.004 |
| 1:45 PM 12/15 | 1.63 | 0.0031 |
| 1:30 PM 12/15 | 1.64 | 0.0035 |
16' -
Widespread flooding commences with the 100 year flood being affected at a stage height of 15.8 feet.
13.5' -
Water begins to flow over the bridge at the gage site.
11' -
Flooding will be occurring in the town of Surprise. This level is similar to the flood experienced in 2008.
10' -
Water reaches the bottom of the bridge near the gage. The resulting backwater will eventually close Miller Street, also known as County Road D going south of town.
7' -
County road 24 1/2 will begin to flood downstream of Surprise. In addition, the city park near the gage site begins to flood.
| Date | Stage (ft) |
|---|---|
| Jul 19, 1965 | 11.52 |
| Jun 6, 2008 | 11.25 |
| Jun 30, 1986 | 10.64 |
| Jun 15, 1967 | 10.17 |
| Jul 12, 1972 | 10.17 |
| Mar 14, 2019 | 9.86 |
| Jun 4, 1991 | 9.58 |
| Mar 10, 1993 | 9.57 |
| Aug 9, 2007 | 9.45 |
| Sep 4, 1977 | 9.25 |
| Mar 13, 1971 | 9.14 |
| Jun 10, 1967 | 9.09 |
| Mar 20, 1969 | 9.08 |
| May 14, 2016 | 9.01 |
| Jul 20, 1985 | 8.91 |
| Jul 29, 1990 | 8.6 |
| Sep 9, 1989 | 8.21 |
| Aug 18, 2017 | 8.18 |
| May 12, 2011 | 8.14 |
| May 28, 1973 | 8.12 |
Data provided by the National Weather Service.
