Search
Menu

Explore

Hazards

Analysis

Rankings

Reference

Mississippi River at Herculaneum

Highest listed crest 29.79 ftFlood stage 26.0 ft8 crests since 2021

The Mississippi River at Herculaneum crested above flood stage 8 times among the 8 crests the National Weather Service lists from 2021 to 2026. The highest, 29.79 ft on July 10, 2024, was minor flooding, 3.79 feet above flood stage. 26 other gauges on the Mississippi River crested above flood stage within a week of it.

The gauge

Highest listed crest
29.79 ft
July 10, 2024
Flood stage
26.0 ft
Major flooding from 37.0 ft
Crests at major
0
8 above flood stage
Most recent flood crest
May 1, 2026
27.12 ft, minor flooding
Location
Jefferson County
Near Festus (3.8 mi), Arnold (11.1 mi), Waterloo (13.0 mi)
Identifiers
NWS HRCM7
No USGS station

Flood stages

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

Flood categories, Mississippi River at Herculaneum
Action stage24.00—The level at which the NWS or its partners begin to take action
Flood stage (minor)26.08May 1, 2026Minimal or no property damage, but possibly some public threat
Moderate flood stage32.00—Some inundation of structures and roads near the stream
Major flood stage37.00—Extensive inundation of structures and roads

Every listed crest

8 crests from 2021 to 2026. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Mississippi River at Herculaneum, 2021 to 2026 26283032343638ft Flood stage 26.0 ftMajor 37.0 ft Mar 21, 2021: 29.31 ft, minor floodingJun 29, 2021: 27.41 ft, minor floodingMay 8, 2022: 27.90 ft, minor floodingMay 2, 2024: 27.10 ft, minor floodingMay 11, 2024: 26.39 ft, minor floodingJul 10, 2024: 29.79 ft, minor floodingJul 17, 2024: 26.02 ft, minor floodingMay 1, 2026: 27.12 ft, minor flooding Highest, 29.79 ft, Jul 10, 2024 20252030
  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

Highest listed crests, Mississippi River at Herculaneum
1Jul 10, 202429.79+3.79Minor—
2Mar 21, 202129.31+3.31Minor—
3May 8, 202227.90+1.90Minor—
4Jun 29, 202127.41+1.41Minor—
5May 1, 202627.12+1.12Minor—
6May 2, 202427.10+1.10Minor—
7May 11, 202426.39+0.39Minor—
8Jul 17, 202426.02+0.02Minor—

The worst floods along the Mississippi River

For this gauge's highest crests, the other gauges on the Mississippi River that crested above flood stage within a week.

July 10, 2024: 29.79 ft here, minor flooding

March 21, 2021: 29.31 ft here, minor flooding

May 8, 2022: 27.90 ft here, minor flooding

  • ChesterIL · May 8, 2022 · 32.28 ft · Minor
  • GraftonIL · May 7, 2022 · 21.28 ft · Minor
  • HannibalMO · May 7, 2022 · 17.03 ft · Minor
  • St. CloudMN · May 14, 2022 · 9.68 ft · Minor

Gauges on the Mississippi River

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

Flood gauges on the Mississippi River
TiptonvilleMO37.048.35 ft, May 5, 20112
Alma - Pool 5MN672.0672.13 ft, Apr 16, 20010
AltonIL21.039.55 ft, Aug 1, 19937
Baton RougeLA35.047.28 ft, May 15, 192731
BellevueIL17.023.51 ft, Apr 26, 196511
BrainerdMN16.017.61 ft, Jun 28, 20120
BrownsvilleMN635.0640.20 ft, Apr 22, 19650
BurlingtonIL15.025.73 ft, Jun 17, 200836
CamancheIA17.024.65 ft, Apr 28, 196520
Canton Lock and Dam 20MO15.027.88 ft, Jul 9, 19933
Cape GirardeauMO32.048.86 ft, Jan 2, 201615
CaruthersvilleMO32.047.61 ft, May 7, 20112
ChesterIL27.049.74 ft, Aug 7, 19939
Clarksville Lock and Dam 24MO25.037.73 ft, Jul 29, 199310
ClaytonIA620.0627.28 ft, Apr 24, 19650
DakotaMN644.0649.08 ft, Apr 21, 19650
DonaldsonvilleLA27.036.01 ft, May 15, 19273
Dubuque (LD11)IA16.025.69 ft, Apr 26, 196513
Dubuque (Railroad Bridge)IA17.026.81 ft, Apr 26, 196518
Fort RipleyMN10.514.15 ft, Apr 8, 19970
Fridley abv 37th Ave NEMN16.020.00 ft, Apr 17, 19656
FultonIL16.024.75 ft, Apr 28, 196513
GladstoneIL10.022.46 ft, Jun 17, 200824
GraftonIL20.038.17 ft, Aug 1, 199315
Gregory LandingMO15.028.49 ft, Jul 9, 19934
HannibalMO17.031.80 ft, Jul 15, 199310
HelenaAR44.060.21 ft, Feb 12, 19374
Herculaneum this gaugeMO26.029.79 ft, Jul 10, 20240
HickmanKY34.054.29 ft, May 2, 20113
Hwy 169 at ChamplinMN12.017.96 ft, Apr 12, 19653
Hwy 610 in Brooklyn ParkMN12.019.53 ft, Apr 17, 19654
Illinois CityIA15.024.10 ft, Jul 9, 199321
KeithsburgIA14.024.49 ft, Jun 17, 200822
KeokukIA16.027.58 ft, Jul 10, 199324
La Crosse - Pool 8WI12.017.89 ft, Apr 22, 19654
LaGrangeMO17.030.00 ft, Jul 13, 19934
Lake CityWI16.022.18 ft, Apr 19, 19653
Lansing - Pool 9IA17.022.50 ft, Apr 24, 19651
LeClaireIA11.017.75 ft, Apr 28, 196516
LouisianaMO15.028.40 ft, Jul 28, 19934
McGregorIA16.025.38 ft, Apr 24, 19653
Mel Price (Alton) Lock and DamIL21.042.72 ft, Aug 1, 19938
MemphisTN34.048.70 ft, Feb 10, 19372
MuscatineIA16.025.61 ft, Jul 9, 199321
NatchezMS48.061.95 ft, May 19, 20116
New BostonIL15.025.90 ft, Jul 9, 199322
New MadridMO34.048.35 ft, May 6, 20114
New OrleansLA17.021.27 ft, Apr 25, 19225
OsceolaAR28.050.90 ft, Feb 7, 193742
QuincyIL19.032.13 ft, Jul 13, 19937
Quincy Lock and Dam 21IL18.031.30 ft, Jul 13, 19937
Red River LandingLA48.063.39 ft, May 18, 20110
Red WingMN14.020.70 ft, Apr 18, 19659
ReserveLA22.026.00 ft, Jun 11, 19291
Rock IslandIL15.022.70 ft, May 2, 201920
Saverton Lock and Dam 22MO16.029.58 ft, Jul 25, 19939
St. CloudMN9.011.44 ft, Apr 8, 19971
St. LouisMO30.049.58 ft, Aug 1, 19939
St. PaulMN14.026.01 ft, Apr 16, 196516
ThebesIL33.047.74 ft, Jan 2, 201612
Tunica Mhoon LandingMS30.053.20 ft, Feb 10, 19375
VicksburgLA43.057.10 ft, May 19, 201112
Wabasha - Pool 4MN12.020.05 ft, Apr 19, 19657
Winfield Lock and Dam 25MO26.039.62 ft, Aug 1, 19939
Winona - Pool 6MN13.020.77 ft, Apr 19, 19655
Lock and Dam 10 - GuttenbergIA15.023.65 ft, Apr 24, 19652
Lock and Dam 2 - HastingsMN15.025.90 ft, Apr 17, 196512
Lock and Dam 3 - Red WingMN680.5687.77 ft, Apr 19, 19658
Lock and Dam 4 - AlmaWI16.019.78 ft, Apr 19, 19652
Lock and Dam 5 - Minnesota CityMN660.0667.85 ft, Apr 19, 19654
Lock and Dam 5a - WinonaMN655.0663.35 ft, Apr 19, 19654
Lock and Dam 6 - TrempealeauMN647.0653.02 ft, Apr 21, 19654
Lock and Dam 7 - La CrescentMN641.0647.38 ft, Apr 21, 19652
Lock and Dam 8 - GenoaWI631.0638.40 ft, Apr 22, 19653
Lock and Dam 9 - LynxvilleWI625.0633.16 ft, Apr 24, 19653
AitkinMN13.022.49 ft, May 20, 195011
Arkansas CityAR37.059.20 ft, Apr 21, 192715
GreenvilleAR48.065.40 ft, Apr 21, 192718

Other gauges in Jefferson County

Flood gauges in Jefferson County
Byrnesville16.030.20 ft, Aug 21, 19153
DeSoto10.014.30 ft, Apr 13, 20131
Arnold24.047.26 ft, Dec 31, 201512
Pacific15.033.42 ft, Dec 30, 20155

Jefferson County: every hazard · River floods across the country · Missouri

NOAA National Water Prediction Service, gauge HRCM7, 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.