oke U. S. Army Corps of Engineers, Jacksonville District Lake Okeechobee and Vicinity Report ** Preliminary Data - Subject to Revision ** LOSOM24 Reg ZoneA = 17.00 LOSOM24 Reg ZoneBC = 16.60 LOSOM24 Reg ZoneD = 12.59 Data Ending 2400 hours 10 SEP 2026 _____________________________________________________________________________ Okeechobee Lake Regulation Elevation Last Year 2YRS Ago (ft-NGVD) (ft-NGVD) (ft-NGVD) *Okeechobee Lake Elevation 11.26 12.88 14.58 (Official Elv) 10SEP (1965-2007) Period of Record Average 14.47 Difference from POR Average -3.21 Today Lake Okeechobee elevation is determined from the 4 Int & 4 Edge stations ++Navigation Depth (Based on 2007 Channel Condition Survey) Route 1 ÷ 5.20' ++Navigation Depth (Based on 2008 Channel Condition Survey) Route 2 ÷ 3.40' Bridge Clearance = 49.49' ______________________________________________________________________________ 4 Interior and 4 Edge Okeechobee Lake Average (Avg-Daily values): L001 L005 L006 LZ40 S4 S352 S308 S133 11.31 11.33 11.25 11.19 9.77 11.35 11.19 11.17 *Combination Okeechobee Avg-Daily Lake Average = 11.26 (*See Note) ______________________________________________________________________________ Okeechobee Inflows (cfs): S65E 490 S65EX1 0 Fisheating Cr 884 S154 0 S191 115 S135 Pumps 0 S84 214 S133 Pumps 42 S2 Pumps 0 S84X 92 S127 Pumps 0 S3 Pumps 0 S71 118 S129 Pumps 24 S4 Pumps 0 S72 106 S131 Pumps 0 C5 0 Total Inflows: 2085 Okeechobee Outflows (cfs): S135 Culverts 368 S354 0 S77 0 S127 Culverts 89 S351 0 S308 -360 S129 Culverts 0 S352 0 S131 Culverts 13 L8 Canal Pt -434 Total Outflows: -324 ****S77 structure flow is being used to compute Total Outflow. ****S308 below flow meter is being used to compute Total Outflow. Okeechobee Pan Evaporation (inches): S77 0.30 S308 0.30 Average Pan Evap x 0.75 Pan Coefficient = 0.23" = 0.02' Lake Average Precipitation using NEXRAD: = -NR-" = -NR-' Evaporation - Precipitation: = -NR-" = -NR-' Evaporation - Precipitation using Lake Area of 730 square miles is equal to -NR- Lake Okeechobee (Change in Storage) Flow is 9075 cfs or 18000 AC-FT ______________________________________________________________________________ ______________________________________________________________________________ Headwater Tailwater ----------- Gate Positions ------------ Elevation Elevation Disch #1 #2 #3 #4 #5 #6 #7 #8 (ft-msl) (ft-msl) (cfs) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (I) see note at bottom North East Shore S133 Pumps: 13.30 11.14 42 0 0 0 -NR- -NR- (cfs) S193: ______ S191: 18.94 11.12 115 0.0 0.0 0.5 S135 Pumps: 13.53 11.40 0 0 0 0 0 (cfs) S135 Culverts: 368 5.0 5.0 North West Shore S65E: 20.95 11.00 490 0.2 0.2 0.1 0.2 0.2 0.2 S65EX1: 20.95 11.00 0 S127 Pumps: 13.31 11.87 0 0 0 0 0 0 (cfs) S127 Culvert: 89 2.5 S129 Pumps: 12.90 12.65 24 31 0 0 (cfs) S129 Culvert: 0 0.0 S131 Pumps: 12.94 12.16 0 0 0 (cfs) S131 Culvert: 13 Fisheating Creek nr Palmdale 32.79 884 nr Lakeport ______ S282 11.26 11.34 0.0 0.0 0.0 South Shore S4 Pumps: 11.88 11.30 0 0 0 0 (cfs) S169: ______ -NR- -NR- -NR- -NR- -NR- S310: ______ -NR- S3 Pumps: 11.31 11.36 0 0 0 0 (cfs) S354: 11.36 11.31 0 0.0 0.0 S2 Pumps: 10.52 11.37 0 0 0 0 0 (cfs) S351: 11.37 10.52 0 0.0 0.0 0.0 S352: 11.44 10.70 0 0.0 0.0 S271: 11.50 11.66 9.2 9.6 9.8 8.5 L8 Canal PT ______ -434 _________________________________________________________________________ S351 and S352 Temporary Pumps/S354 Spillway S351: 10.52 11.37 0 -NR--NR--NR--NR--NR--NR- S352: 10.70 11.44 0 -NR--NR--NR--NR- S354: 11.31 11.36 0 -NR--NR--NR--NR- _________________________________________________________________________ Caloosahatchee River (S77, S78, S79) S47B: 13.01 11.03 0.5 0.5 S47D: 11.02 11.01 101 5.0 S77: Spillway and Sector Preferred Flow: 11.25 10.85 0 0.0 0.0 0.0 0.0 Flow Due to Lockages+: 0 S78: Spillway and Sector Flow: 11.06 3.52 1128 1.5 0.0 0.0 2.0 Flow Due to Lockages+: 10 S79: Spillway and Sector Flow: 3.67 1.13 3445 0.0 2.0 3.0 1.0 3.0 3.0 3.0 0.0 Flow Due to Lockages+: 3 Percent of flow from S77 0% Chloride (ppm) 0 St. Lucie Canal (S308, S80) S308: Spillway and Sector Preferred Flow: 11.22 14.01 -356 0.0 0.0 3.0 0.0 Flow Due to Lockages+: -4 S153: 18.70 13.84 69 0.0 0.0 S80: Spillway and Sector Flow: 14.16 2.15 0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Flow Due to Lockages+: 8 Percent of flow from S308 NA % Steele Point Top Salinity (mg/ml) **** Steele Point Bottom Salinity (mg/ml) **** Speedy Point Top Salinity (mg/ml) **** Speedy Point Bottom Salinity (mg/ml) **** + Flow Due to lockages is computed utilizing average daily headwater and tailwater along with total number of lockages for the day to calculate a volume which is then converted to an average discharge in cfs. ++ Preferred flow is determined from either the spillway discharge or the below flow meter daily ______________________________________________________________________________ ----- Wind ---- Daily Precipitation Totals 1-Day 3-Day 7-Day Direction Speed (inches) (inches) (inches) (Degų) (mph) S133 Pump Station: -NR- 0.00 0.00 S193: -NR- 0.00 0.00 -NR- -NR- Okeechobee Field Station: -NR- 0.00 0.00 S135 Pump Station: -NR- 0.00 0.00 S127 Pump Station: -NR- 0.00 0.00 S129 Pump Station: -NR- 0.00 0.00 S131 Pump Station: -NR- 0.00 0.00 S77: -NR- 0.00 0.00 33 -NR- S78: -NR- 0.00 0.00 -NR- -NR- S79: -NR- 0.00 0.00 108 1 S4 Pump Station: -NR- 0.00 0.00 Clewiston Field Station: -NR- 0.00 0.00 S3 Pump Station: -NR- 0.00 0.00 S2 Pump Station: -NR- 0.00 0.00 S308: -NR- 0.00 0.00 326 6 S80: -NR- 0.00 0.00 352 1 Okeechobee Average -NR- 0.00 0.00 (Sites S78, S79 and S80 not included) ----------------------------------------------------------------- Oke Nexrad Basin Avg -NR- 0.00 0.00 ----------------------------------------------------------------- ______________________________________________________________________________ Okeechobee Lake Elevations 10 SEP 2026 11.26 Difference from 10SEP26 10SEP26 -1 Day = 09 SEP 2026 11.21 -0.05 10SEP26 -2 Days = 08 SEP 2026 11.20 -0.06 10SEP26 -3 Days = 07 SEP 2026 11.18 -0.08 10SEP26 -4 Days = 06 SEP 2026 11.18 -0.08 10SEP26 -5 Days = 05 SEP 2026 11.10 -0.16 10SEP26 -6 Days = 04 SEP 2026 11.05 -0.21 10SEP26 -7 Days = 03 SEP 2026 11.03 -0.23 10SEP26 -30 Days = 11 AUG 2026 11.04 -0.22 10SEP26 -1 Year = 10 SEP 2025 12.88 1.62 10SEP26 -2 Year = 10 SEP 2024 14.58 3.32 ______________________________________________________________________________ ______________________________________________________________________________ Lake Okeechobee Net Inflow (LONIN) Average Flow over the previous 14 days | Avg-Daily Flow 10SEP26 Today = 10 SEP 2026 4646 FRI | 9075 10SEP26 -1 Day = 09 SEP 2026 4232 THU | 1815 10SEP26 -2 Days = 08 SEP 2026 4120 WED | 3529 10SEP26 -3 Days = 07 SEP 2026 3895 TUE | 0 10SEP26 -4 Days = 06 SEP 2026 3926 MON | 14117 10SEP26 -5 Days = 05 SEP 2026 2716 SUN | 9075 10SEP26 -6 Days = 04 SEP 2026 2093 SAT | 3630 10SEP26 -7 Days = 03 SEP 2026 1873 FRI | 7109 10SEP26 -8 Days = 02 SEP 2026 948 THU | 1664 10SEP26 -9 Days = 01 SEP 2026 685 WED | 4991 10SEP26 -10 Days = 31 AUG 2026 108 TUE | 8319 10SEP26 -11 Days = 30 AUG 2026 -593 MON | 3261 10SEP26 -12 Days = 29 AUG 2026 -1055 SUN | 38 10SEP26 -13 Days = 28 AUG 2026 -1184 SAT | -1577 ______________________________________________________________________________ ______________________________________________________________________________ S65E Average Flow over previous 14 days | Avg-Daily Flow 10SEP26 Today= 10 SEP 2026 521 FRI | 569 10SEP26 -1 Day = 09 SEP 2026 505 THU | 631 10SEP26 -2 Days = 08 SEP 2026 483 WED | 652 10SEP26 -3 Days = 07 SEP 2026 448 TUE | 647 10SEP26 -4 Days = 06 SEP 2026 412 MON | 787 10SEP26 -5 Days = 05 SEP 2026 367 SUN | 688 10SEP26 -6 Days = 04 SEP 2026 329 SAT | 509 10SEP26 -7 Days = 03 SEP 2026 309 FRI | 443 10SEP26 -8 Days = 02 SEP 2026 292 THU | 521 10SEP26 -9 Days = 01 SEP 2026 272 WED | 581 10SEP26 -10 Days = 31 AUG 2026 256 TUE | 468 10SEP26 -11 Days = 30 AUG 2026 250 MON | 276 10SEP26 -12 Days = 29 AUG 2026 258 SUN | 275 10SEP26 -13 Days = 28 AUG 2026 263 SAT | 248 ______________________________________________________________________________ ______________________________________________________________________________ S65EX1 Average Flow over previous 14 days | Avg-Daily Flow 10SEP26 Today= 10 SEP 2026 22 FRI | 0 10SEP26 -1 Day = 09 SEP 2026 22 THU | 0 10SEP26 -2 Days = 08 SEP 2026 22 WED | 9 10SEP26 -3 Days = 07 SEP 2026 21 TUE | 34 10SEP26 -4 Days = 06 SEP 2026 19 MON | 19 10SEP26 -5 Days = 05 SEP 2026 17 SUN | 24 10SEP26 -6 Days = 04 SEP 2026 16 SAT | 26 10SEP26 -7 Days = 03 SEP 2026 14 FRI | 24 10SEP26 -8 Days = 02 SEP 2026 12 THU | 27 10SEP26 -9 Days = 01 SEP 2026 10 WED | 27 10SEP26 -10 Days = 31 AUG 2026 8 TUE | 40 10SEP26 -11 Days = 30 AUG 2026 5 MON | 41 10SEP26 -12 Days = 29 AUG 2026 2 SUN | 32 10SEP26 -13 Days = 28 AUG 2026 0 SAT | 0 ______________________________________________________________________________ Lake Okeechobee Outlets Last 14 Days S-77 Below S-77 S-78 S-79 Discharge Discharge Discharge Discharge (ALL DAY) (ALL-DAY) (ALL DAY) (ALL DAY) DATE (AC-FT) (AC-FT) (AC-FT) (AC-FT) 10 SEP 2026 0 -49 2255 6908 09 SEP 2026 0 221 2081 5456 08 SEP 2026 0 -37 2196 5851 07 SEP 2026 -0 -41 2129 5787 06 SEP 2026 -0 49 1408 4698 05 SEP 2026 0 259 1036 3810 04 SEP 2026 0 82 1042 3425 03 SEP 2026 0 86 1026 3248 02 SEP 2026 0 41 1049 2616 01 SEP 2026 0 -7 918 3851 31 AUG 2026 0 131 1009 4109 30 AUG 2026 -0 -4 1428 3598 29 AUG 2026 -0 23 1614 3588 28 AUG 2026 -304 -372 1032 1979 S-310 S-351 S-352 S-354 L8 Canal Pt Discharge Discharge Discharge Discharge Discharge (ALL DAY) (ALL DAY) (ALL DAY) (ALL DAY) (ALL DAY) DATE (AC-FT) (AC-FT) (AC-FT) (AC-FT) (AC-FT) 10 SEP 2026 -NR- 0 0 0 -NR- 09 SEP 2026 -NR- 0 0 0 -NR- 08 SEP 2026 -NR- 0 0 0 -NR- 07 SEP 2026 -NR- 0 0 0 -NR- 06 SEP 2026 -NR- 0 0 0 -NR- 05 SEP 2026 -NR- 0 0 0 -NR- 04 SEP 2026 -NR- 0 0 0 -NR- 03 SEP 2026 -NR- 0 0 0 -NR- 02 SEP 2026 -NR- 0 0 0 -NR- 01 SEP 2026 -NR- 0 0 0 -NR- 31 AUG 2026 -NR- 0 0 0 -NR- 30 AUG 2026 -NR- 0 0 0 -NR- 29 AUG 2026 -NR- 0 0 0 -NR- 28 AUG 2026 -NR- 0 0 0 -NR- S-308 Below S-308 S-80 Discharge Discharge Discharge (ALL DAY) (ALL-DAY) (ALL-DAY) DATE (AC-FT) (AC-FT) (AC-FT) 10 SEP 2026 -2863 -NR- 15 09 SEP 2026 -3027 8 -NR- 08 SEP 2026 -2036 0 15 07 SEP 2026 -4103 9 19 06 SEP 2026 -3828 8 15 05 SEP 2026 -4510 19 11 04 SEP 2026 -9212 36 12 03 SEP 2026 -4670 14 4 02 SEP 2026 -9635 42 0 01 SEP 2026 -9029 34 16 31 AUG 2026 -5137 15 12 30 AUG 2026 -5334 17 4 29 AUG 2026 -4 -6 8 28 AUG 2026 -8 -3 27 *** NOTE: Discharge (ALL DAY) is computed using Spillway, Sector Gate and Lockages Discharges from 0015 hrs to 2400 hrs. ______________________________________________________________________________ (I) - Flows preceeded by "I" signify an instantaneous flow computed from the single value reported for the day ______________________________________________________________________________ * On 11 May 1999, Lake Okeechobee Elevation was switched from Instantaneous 2400 value to an average-daily lake average. On 14 Mar 2001, due to the isolation of various gages within the standard 10 stations, the average of the interior 4 station gages was used as the Lake Okeechobee Elevation. On 05 November 2010, Lake Okeechobee Elevation was switched to a 9 gage mix of interior and edge gages to obtain a more reliable representation of the lake level. On 09 May 2011, Lake Okeechobee Elevation was switched to a 8 gage mix of interior and edge gages to obtain a more reliable representation of the lake level due to isolation of S135 from low lake levels. Today Lake Okechobee elevation is determined from the 4 Int & 4 Edge stations ++ For more information see the Jacksonville District Navigation website at http://www.saj.usace.army.mil/ $ For information regarding Lake Okeechobee Service Area water restrictions please refer to www.sfwmd.gov ______________________________________________________________________________ Report Generated 11SEP2026 @ 15:15 ** Preliminary Data - Subject to Revision **