Big Blue River at Surprise
Critical Stages
6' - Action
7' - Flood
10' - Moderate
12' - Major
Latest Observation
Updated: 2:45 AM CST 12/16/25
Status: No Flooding
Stage: 3.29 ft
Flow: 0.32 kcfs
Forecast
Forecast not available for this location.
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 2:45 AM 12/16 | 3.29 | 0.32 |
| 2:30 AM 12/16 | 3.44 | 0.363 |
| 2:15 AM 12/16 | 3.51 | 0.384 |
| 2:00 AM 12/16 | 3.66 | 0.426 |
| 1:45 AM 12/16 | 3.79 | 0.461 |
| 1:30 AM 12/16 | 3.97 | 0.51 |
| 1:15 AM 12/16 | 4.12 | 0.551 |
| 1:00 AM 12/16 | 4.31 | 0.603 |
| 12:45 AM 12/16 | 4.48 | 0.648 |
| 12:30 AM 12/16 | 4.72 | 0.714 |
| 12:15 AM 12/16 | 4.94 | 0.776 |
| 12:00 AM 12/16 | 5.17 | 0.835 |
| 11:45 PM 12/15 | 5.51 | 0.919 |
| 11:30 PM 12/15 | 5.81 | 0.994 |
| 11:15 PM 12/15 | 4.38 | 0.621 |
| 11:00 PM 12/15 | 3.67 | 0.429 |
| 10:45 PM 12/15 | 2.13 | 0.0489 |
| 10:30 PM 12/15 | 1.84 | 0.0175 |
| 10:15 PM 12/15 | 1.85 | 0.0182 |
| 10:00 PM 12/15 | 1.6 | 0.002 |
| 9:45 PM 12/15 | 1.97 | 0.0293 |
| 9:30 PM 12/15 | 2.69 | 0.153 |
| 9:15 PM 12/15 | 4.39 | 0.623 |
| 9:00 PM 12/15 | 5.51 | 0.919 |
| 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 |
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.
