oke U. S. Army Corps of Engineers, Jacksonville District Lake Okeechobee and Vicinity Report ** Preliminary Data - Subject to Revision ** Data Ending 2400 hours 25 JUL 2021 _____________________________________________________________________________ Okeechobee Lake Regulation Elevation Last Year 2YRS Ago (ft-NGVD) (ft-NGVD) (ft-NGVD) *Okeechobee Lake Elevation 13.53 12.91 11.51 (Official Elv) Bottom of High Lake Mngmt= 16.25 Top of Water Short Mngmt= 11.62 Currently in Operational Management Band Simulated Average LORS2008 [1965-2000] 12.61 Difference from Average LORS2008 0.92 25JUL (1965-2007) Period of Record Average 13.71 Difference from POR Average -0.18 Today Lake Okeechobee elevation is determined from the 4 Int & 4 Edge stations ++Navigation Depth (Based on 2007 Channel Condition Survey) Route 1 ÷ 7.47' ++Navigation Depth (Based on 2008 Channel Condition Survey) Route 2 ÷ 5.67' Bridge Clearance = 49.46' ______________________________________________________________________________ 4 Interior and 4 Edge Okeechobee Lake Average (Avg-Daily values): L001 L005 L006 LZ40 S4 S352 S308 S133 13.52 13.60 13.46 13.50 13.54 13.63 13.52 13.48 *Combination Okeechobee Avg-Daily Lake Average = 13.53 (*See Note) ______________________________________________________________________________ Okeechobee Inflows (cfs): S65E 1346 S65EX1 0 Fisheating Cr 192 S154 33 S191 0 S135 Pumps 164 S84 736 S133 Pumps 34 S2 Pumps 0 S84X 297 S127 Pumps 36 S3 Pumps 0 S71 662 S129 Pumps 0 S4 Pumps 0 S72 203 S131 Pumps 23 C5 0 Total Inflows: 3725 Okeechobee Outflows (cfs): S135 Culverts 0 S354 0 S77 5 S127 Culverts 0 S351 0 S308 -81 S129 Culverts 0 S352 0 S131 Culverts 0 L8 Canal Pt -NR- Total Outflows: -76 ****S77 structure flow is being used to compute Total Outflow. ****S308 structure flow 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 4235 cfs or 8400 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: 13.29 13.67 34 0 0 0 0 0 (cfs) S193: ______ S191: 18.28 13.68 0 0.0 0.0 0.0 S135 Pumps: 13.39 13.58 164 -NR- -NR- -NR- -NR- (cfs) S135 Culverts: 0 0.0 0.0 North West Shore S65E: 21.11 13.70 1346 1.1 0.4 0.5 0.5 1.0 -0.0 S65EX1: 21.11 13.70 0 S127 Pumps: 13.41 13.59 36 0 36 0 0 0 (cfs) S127 Culvert: 0 0.0 S129 Pumps: 13.00 13.56 0 0 0 0 (cfs) S129 Culvert: 0 0.0 S131 Pumps: 12.85 13.62 23 25 0 (cfs) S131 Culvert: 0 Fisheating Creek nr Palmdale 31.64 192 nr Lakeport ______ C5: ______ -NR- 0 -NR- -NR- -NR- South Shore S4 Pumps: 11.23 13.38 0 0 0 0 (cfs) S169: ______ -NR- -NR- -NR- -NR- -NR- S310: 13.41 -16 S3 Pumps: 9.71 13.39 0 0 0 0 (cfs) S354: 13.39 9.71 0 0.0 0.0 S2 Pumps: 10.07 -NR- 0 -NR- -NR- -NR- -NR- (cfs) S351: -NR- 10.07 0 0.0 0.0 0.0 S352: 13.64 10.53 0 0.0 0.0 C10A: -NR- 13.46 8.0 8.0 8.0 0.0 0.0 L8 Canal PT ______ -NR- _________________________________________________________________________ S351 and S352 Temporary Pumps/S354 Spillway S351: 10.07 -NR- 0 -NR--NR--NR--NR--NR--NR- S352: 10.53 13.64 0 -NR--NR--NR--NR- S354: 9.71 13.39 0 -NR--NR--NR--NR- _________________________________________________________________________ Caloosahatchee River (S77, S78, S79) S47B: 13.22 12.01 1.0 1.5 S47D: 12.06 11.21 0 0.0 S77: Spillway and Sector Preferred Flow: 13.37 11.09 0 0.0 0.0 0.0 0.0 Flow Due to Lockages+: 5 S78: Spillway and Sector Flow: 11.12 3.07 485 0.0 0.0 0.0 1.0 Flow Due to Lockages+: 14 S79: Spillway and Sector Flow: 3.28 1.26 1676 1.0 1.0 1.0 0.0 0.0 0.0 0.0 0.0 Flow Due to Lockages+: 6 Percent of flow from S77 0% Chloride (ppm) 0 St. Lucie Canal (S308, S80) S308: Spillway and Sector Preferred Flow: 13.56 14.04 -80 0.0 0.0 0.0 0.0 Flow Due to Lockages+: -1 S153: 19.07 13.69 0 0.0 0.0 S80: Spillway and Sector Flow: 13.94 1.94 0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Flow Due to Lockages+: 20 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: 0.00 1.68 2.57 155 6 S78: 0.00 1.94 2.80 171 1 S79: 0.17 0.62 0.64 338 5 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: 0.00 0.77 1.12 146 4 S80: 0.00 0.93 1.01 161 2 Okeechobee Average 0.00 0.19 0.28 (Sites S78, S79 and S80 not included) ----------------------------------------------------------------- Oke Nexrad Basin Avg -NR- 0.00 0.00 ----------------------------------------------------------------- ______________________________________________________________________________ Okeechobee Lake Elevations 25 JUL 2021 13.53 Difference from 25JUL21 25JUL21 -1 Day = 24 JUL 2021 13.51 -0.02 25JUL21 -2 Days = 23 JUL 2021 13.50 -0.03 25JUL21 -3 Days = 22 JUL 2021 13.49 -0.04 25JUL21 -4 Days = 21 JUL 2021 13.48 -0.05 25JUL21 -5 Days = 20 JUL 2021 13.48 -0.05 25JUL21 -6 Days = 19 JUL 2021 13.47 -0.06 25JUL21 -7 Days = 18 JUL 2021 13.47 -0.06 25JUL21 -30 Days = 25 JUN 2021 12.65 -0.88 25JUL21 -1 Year = 25 JUL 2020 12.91 -0.62 25JUL21 -2 Year = 25 JUL 2019 11.51 -2.02 ______________________________________________________________________________ Long Term Mean 30day Avearge ET for Lake Alfred (Inches) = -NR- ______________________________________________________________________________ Lake Okeechobee Net Inflow (LONIN) Average Flow over the previous 14 days | Avg-Daily Flow 25JUL21 Today = 25 JUL 2021 3626 MON | 4235 25JUL21 -1 Day = 24 JUL 2021 3777 SUN | 2362 25JUL21 -2 Days = 23 JUL 2021 4213 SAT | 2395 25JUL21 -3 Days = 22 JUL 2021 4353 FRI | 2245 25JUL21 -4 Days = 21 JUL 2021 4995 THU | 149 25JUL21 -5 Days = 20 JUL 2021 5798 WED | 2700 25JUL21 -6 Days = 19 JUL 2021 7812 TUE | 250 25JUL21 -7 Days = 18 JUL 2021 8992 MON | 4377 25JUL21 -8 Days = 17 JUL 2021 8957 SUN | 2310 25JUL21 -9 Days = 16 JUL 2021 8953 SAT | 54 25JUL21 -10 Days = 15 JUL 2021 9244 FRI | 4134 25JUL21 -11 Days = 14 JUL 2021 9674 THU | 10487 25JUL21 -12 Days = 13 JUL 2021 9934 WED | 10588 25JUL21 -13 Days = 12 JUL 2021 9629 TUE | 4473 ______________________________________________________________________________ ______________________________________________________________________________ S65E Average Flow over previous 14 days | Avg-Daily Flow 25JUL21 Today= 25 JUL 2021 1383 MON | 1509 25JUL21 -1 Day = 24 JUL 2021 1368 SUN | 1510 25JUL21 -2 Days = 23 JUL 2021 1353 SAT | 1508 25JUL21 -3 Days = 22 JUL 2021 1326 FRI | 1542 25JUL21 -4 Days = 21 JUL 2021 1315 THU | 1631 25JUL21 -5 Days = 20 JUL 2021 1286 WED | 1593 25JUL21 -6 Days = 19 JUL 2021 1256 TUE | 1334 25JUL21 -7 Days = 18 JUL 2021 1235 MON | 1312 25JUL21 -8 Days = 17 JUL 2021 1223 SUN | 1330 25JUL21 -9 Days = 16 JUL 2021 1200 SAT | 1319 25JUL21 -10 Days = 15 JUL 2021 1185 FRI | 1354 25JUL21 -11 Days = 14 JUL 2021 1156 THU | 1386 25JUL21 -12 Days = 13 JUL 2021 1124 WED | 788 25JUL21 -13 Days = 12 JUL 2021 1130 TUE | 1242 ______________________________________________________________________________ ______________________________________________________________________________ S65EX1 Average Flow over previous 14 days | Avg-Daily Flow 25JUL21 Today= 25 JUL 2021 51 MON | 0 25JUL21 -1 Day = 24 JUL 2021 51 SUN | 0 25JUL21 -2 Days = 23 JUL 2021 51 SAT | 0 25JUL21 -3 Days = 22 JUL 2021 51 FRI | 0 25JUL21 -4 Days = 21 JUL 2021 51 THU | 0 25JUL21 -5 Days = 20 JUL 2021 51 WED | 0 25JUL21 -6 Days = 19 JUL 2021 51 TUE | 0 25JUL21 -7 Days = 18 JUL 2021 51 MON | 0 25JUL21 -8 Days = 17 JUL 2021 51 SUN | 0 25JUL21 -9 Days = 16 JUL 2021 51 SAT | 0 25JUL21 -10 Days = 15 JUL 2021 51 FRI | 0 25JUL21 -11 Days = 14 JUL 2021 51 THU | 0 25JUL21 -12 Days = 13 JUL 2021 51 WED | 621 25JUL21 -13 Days = 12 JUL 2021 7 TUE | 95 ______________________________________________________________________________ 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) 25 JUL 2021 9 174 970 3196 24 JUL 2021 7 225 907 3994 23 JUL 2021 4 90 468 2664 22 JUL 2021 7 376 1066 4292 21 JUL 2021 5 485 1283 4341 20 JUL 2021 4 234 1378 5174 19 JUL 2021 390 780 1739 4364 18 JUL 2021 342 501 1881 5261 17 JUL 2021 344 842 2547 6308 16 JUL 2021 4 632 3661 7531 15 JUL 2021 4 750 3788 8686 14 JUL 2021 5 690 3145 7468 13 JUL 2021 -NR- 619 2371 5388 12 JUL 2021 343 1026 1897 4283 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) 25 JUL 2021 -31 0 0 0 -NR- 24 JUL 2021 -50 0 484 0 -NR- 23 JUL 2021 1 89 560 0 -NR- 22 JUL 2021 -62 90 264 0 -NR- 21 JUL 2021 -26 295 0 0 -NR- 20 JUL 2021 17 754 362 0 -NR- 19 JUL 2021 15 0 0 0 -NR- 18 JUL 2021 -99 0 0 0 -NR- 17 JUL 2021 -115 0 0 0 -NR- 16 JUL 2021 -189 0 0 0 -NR- 15 JUL 2021 -191 0 0 0 -NR- 14 JUL 2021 -218 0 0 0 -NR- 13 JUL 2021 -108 0 0 0 -NR- 12 JUL 2021 -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) 25 JUL 2021 -158 -139 40 24 JUL 2021 -0 32 40 23 JUL 2021 1 -238 37 22 JUL 2021 -0 -27 34 21 JUL 2021 -0 -166 15 20 JUL 2021 -1 -229 34 19 JUL 2021 -214 -351 65 18 JUL 2021 -372 -391 15 17 JUL 2021 -524 -731 34 16 JUL 2021 -1 220 -NR- 15 JUL 2021 -279 -134 55 14 JUL 2021 -504 -437 19 13 JUL 2021 -1046 -1440 27 12 JUL 2021 -577 -690 31 *** 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 26JUL2021 @ 13:15 ** Preliminary Data - Subject to Revision **