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Nassau River near Tisonia (in MHHW)

Highest listed crest 4.52 ftFlood stage 1.3 ft61 crests since 1985

The Nassau River near Tisonia (in MHHW) crested at major flood stage 2 times among the 61 crests the National Weather Service lists from 1985 to 2026. The highest, 4.52 ft on September 11, 2017, was major flooding, 3.22 feet above flood stage.

The gauge

Highest listed crest
4.52 ft
September 11, 2017
Flood stage
1.3 ft
Major flooding from 3.3 ft
Crests at major
2
83rd of 237 gauges in Florida
Most recent flood crest
October 9, 2026
1.61 ft, minor flooding
Location
Duval County
Near Fernandina Beach (11.2 mi), St. Marys (14.3 mi)

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Nassau River near Tisonia (in MHHW)
Action stage0.820Oct 6, 2015The level at which the NWS or its partners begin to take action
Flood stage (minor)1.336Oct 9, 2026Minimal or no property damage, but possibly some public threat
Moderate flood stage2.33Sep 29, 2022Some inundation of structures and roads near the stream
Major flood stage3.32Nov 10, 2022Extensive inundation of structures and roads

Every listed crest

61 crests from 1985 to 2026. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Nassau River near Tisonia (in MHHW), 1985 to 2026 12345ft Flood stage 1.3 ftMajor 3.3 ft Aug 4, 1985: 1.36 ft, minor floodingAug 28, 1985: 1.10 ft, action stageSep 1, 1985: 1.43 ft, minor floodingSep 13, 1985: 1.99 ft, minor floodingSep 17, 1985: 1.72 ft, minor floodingSep 21, 1985: 1.14 ft, action stageOct 29, 1985: 1.26 ft, action stageNov 27, 1985: 1.79 ft, minor floodingDec 1, 1986: 1.03 ft, action stageMar 10, 1989: 1.03 ft, action stageSep 28, 1989: 1.01 ft, action stageSep 29, 1991: 1.08 ft, action stageOct 9, 1991: 1.04 ft, action stageOct 29, 1991: 1.21 ft, action stageNov 9, 1991: 1.11 ft, action stageSep 25, 1992: 1.70 ft, minor floodingSep 30, 1992: 1.25 ft, action stageOct 6, 1992: 1.18 ft, action stageJan 26, 1993: 1.07 ft, action stageFeb 7, 1993: 1.18 ft, action stageNov 26, 1993: 1.09 ft, action stageJul 4, 1995: 2.71 ft, moderate floodingOct 15, 2013: 1.20 ft, action stageNov 5, 2013: 1.22 ft, action stageFeb 12, 2014: 1.02 ft, action stageDec 8, 2014: 1.38 ft, minor floodingMar 24, 2015: 1.01 ft, action stageSep 23, 2015: 1.40 ft, minor floodingSep 27, 2015: 1.33 ft, minor floodingOct 2, 2015: 1.39 ft, minor floodingOct 6, 2015: 1.16 ft, action stageOct 27, 2015: 1.39 ft, minor floodingOct 7, 2016: 2.33 ft, moderate floodingNov 13, 2016: 1.44 ft, minor floodingSep 11, 2017: 4.52 ft, major floodingOct 1, 2017: 1.52 ft, minor floodingOct 17, 2017: 1.36 ft, minor floodingNov 23, 2018: 1.40 ft, minor floodingSep 4, 2019: 1.85 ft, minor floodingNov 9, 2019: 1.39 ft, minor floodingNov 17, 2019: 1.46 ft, minor floodingSep 15, 2020: 1.46 ft, minor floodingSep 21, 2020: 2.20 ft, minor floodingOct 19, 2020: 1.39 ft, minor floodingNov 6, 2021: 2.04 ft, minor floodingSep 29, 2022: 3.02 ft, moderate floodingNov 10, 2022: 3.43 ft, major floodingDec 21, 2022: 1.38 ft, minor floodingApr 10, 2023: 2.02 ft, minor floodingJun 5, 2023: 1.76 ft, minor floodingSep 29, 2023: 1.53 ft, minor floodingDec 17, 2023: 1.32 ft, minor floodingSep 15, 2024: 1.59 ft, minor floodingSep 21, 2024: 1.37 ft, minor floodingOct 10, 2024: 2.04 ft, minor floodingNov 16, 2024: 1.40 ft, minor floodingSep 9, 2025: 1.59 ft, minor floodingSep 13, 2025: 1.40 ft, minor floodingOct 2, 2025: 1.47 ft, minor floodingOct 10, 2025: 2.10 ft, minor floodingOct 9, 2026: 1.61 ft, minor flooding Highest, 4.52 ft, Sep 11, 2017 1990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Nassau River near Tisonia (in MHHW) 1980s: 5 1990s: 2 2000s: 0 2010s: 14 2020s: 20 20 1980s1990s2000s2010s2020s
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

The 50 highest of 61 listed crests.

Highest listed crests, Nassau River near Tisonia (in MHHW)
1Sep 11, 20174.52+3.22Major—
2Nov 10, 20223.43+2.13Major—
3Sep 29, 20223.02+1.72Moderate—
4Jul 4, 19952.71+1.41Moderate—
5Oct 7, 20162.33+1.03Moderate—
6Sep 21, 20202.20+0.90Minor—
7Oct 10, 20252.10+0.80Minor—
8Nov 6, 20212.04+0.74Minor—
9Oct 10, 20242.04+0.74Minor—
10Apr 10, 20232.02+0.72Minor—
11Sep 13, 19851.99+0.69Minor—
12Sep 4, 20191.85+0.55Minor—
13Nov 27, 19851.79+0.49Minor—
14Jun 5, 20231.76+0.46Minor—
15Sep 17, 19851.72+0.42Minor—
16Sep 25, 19921.70+0.40Minor—
17Oct 9, 20261.61+0.31Minor—
18Sep 15, 20241.59+0.29Minor—
19Sep 9, 20251.59+0.29Minor—
20Sep 29, 20231.53+0.23Minor—
21Oct 1, 20171.52+0.22Minor—
22Oct 2, 20251.47+0.17Minor—
23Nov 17, 20191.46+0.16Minor—
24Sep 15, 20201.46+0.16Minor—
25Nov 13, 20161.44+0.14Minor—
26Sep 1, 19851.43+0.13Minor—
27Sep 23, 20151.40+0.10Minor—
28Nov 23, 20181.40+0.10Minor—
29Nov 16, 20241.40+0.10Minor—
30Sep 13, 20251.40+0.10Minor—
31Oct 2, 20151.39+0.09Minor—
32Oct 27, 20151.39+0.09Minor—
33Nov 9, 20191.39+0.09Minor—
34Oct 19, 20201.39+0.09Minor—
35Dec 8, 20141.38+0.08Minor—
36Dec 21, 20221.38+0.08Minor—
37Sep 21, 20241.37+0.07Minor—
38Aug 4, 19851.36+0.06Minor—
39Oct 17, 20171.36+0.06Minor—
40Sep 27, 20151.33+0.03Minor—
41Dec 17, 20231.32+0.02Minor—
42Oct 29, 19851.26−0.04Action—
43Sep 30, 19921.25−0.05Action—
44Nov 5, 20131.22−0.08Action—
45Oct 29, 19911.21−0.09Action—
46Oct 15, 20131.20−0.10Action—
47Oct 6, 19921.18−0.12Action—
48Feb 7, 19931.18−0.12Action—
49Oct 6, 20151.16−0.14Action—
50Sep 21, 19851.14−0.16Action—

Gauges on the Nassau River

Flood gauges sharing the river's name, linked within 80 miles of one another.

Flood gauges on the Nassau River
US-17 (in MHHW)FL1.31.49 ft, Oct 10, 20260
Tisonia (in MHHW) this gaugeFL1.34.52 ft, Sep 11, 20172

Other gauges in Duval County

Flood gauges in Duval County
Atlantic Tide Station at Jacksonville Beach Pier (in MHHW)2.02.25 ft, Sep 24, 20260
Cedar Heights (in MHHW)1.72.29 ft, Oct 7, 20260
Biscayne Boulevard (in MHHW)1.76.89 ft, Sep 11, 20173
San Juan Ave Jacksonville (in MHHW)1.55.66 ft, Sep 11, 20174
Sheffield Road (in MHHW)1.53.47 ft, Sep 11, 20172
Dunn Creek Road (in MHHW)1.54.77 ft, Sep 11, 20172
Fort George State Park (in MHHW)2.02.86 ft, Oct 10, 20250
Fulton Mariners Point (in MHHW)1.62.64 ft, Oct 10, 20250
Old Saint Augustine Road (in MHHW)1.25.35 ft, Sep 11, 20173
St. Johns River Entrance (in MHHW)1.52.35 ft, Oct 11, 20250
Argyle Forest Boulevard (in NAVD88)10.012.99 ft, Sep 11, 20172
Beach Boulevard (US 90) (in MHHW)1.74.76 ft, Sep 11, 20171
Jacksonville (in NAVD88)6.010.04 ft, Sep 11, 20171
Mill Cove (in MHHW)1.62.45 ft, Oct 10, 20250
Buckman Bridge (I-295) (in MHHW)1.55.20 ft, Sep 11, 20175
Dames Point Bridge (I-295) (in MHHW)1.63.67 ft, Sep 11, 20172
Dames Point Bridge (I-295) (in MHHW)1.63.67 ft, Sep 11, 20172
Jacksonville (in MHHW)1.56.00 ft, Oct 12, 18467
Main Street Bridge (in MHHW)1.56.00 ft, Oct 12, 18467
Mayport (in MHHW)1.83.41 ft, Nov 10, 20221
SR 115 near Callahan (in NAVD88)7.07.70 ft, Oct 11, 20260
Tiger Point (in MHHW)2.02.32 ft, Oct 10, 20250
Lem Turner Road (in MHHW)1.84.50 ft, Sep 11, 20172
Sherwood Forest (in MHHW)1.82.59 ft, Oct 11, 20250

Duval County: every hazard · River floods across the country · Florida

NOAA National Water Prediction Service, gauge NATF1, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.