oke U. S. Army Corps of Engineers, Jacksonville District Lake Okeechobee and Vicinity Report ** Preliminary Data - Subject to Revision ** Data Ending 2400 hours 11 MAY 2021 _____________________________________________________________________________ Okeechobee Lake Regulation Elevation Last Year 2YRS Ago (ft-NGVD) (ft-NGVD) (ft-NGVD) *Okeechobee Lake Elevation 13.68 11.17 11.29 (Official Elv) Bottom of High Lake Mngmt= 16.43 Top of Water Short Mngmt= 10.79 Currently in Operational Management Band Simulated Average LORS2008 [1965-2000] 12.16 Difference from Average LORS2008 1.52 11MAY (1965-2007) Period of Record Average 13.36 Difference from POR Average 0.32 Today Lake Okeechobee elevation is determined from the 4 Int & 4 Edge stations ++Navigation Depth (Based on 2007 Channel Condition Survey) Route 1 ÷ 7.62' ++Navigation Depth (Based on 2008 Channel Condition Survey) Route 2 ÷ 5.82' Bridge Clearance = 50.06' ______________________________________________________________________________ 4 Interior and 4 Edge Okeechobee Lake Average (Avg-Daily values): L001 L005 L006 LZ40 S4 S352 S308 S133 13.67 13.75 13.66 13.65 13.62 13.80 13.66 13.61 *Combination Okeechobee Avg-Daily Lake Average = 13.68 (*See Note) ______________________________________________________________________________ Okeechobee Inflows (cfs): S65E 546 S65EX1 0 Fisheating Cr 13 S154 0 S191 0 S135 Pumps 0 S84 0 S133 Pumps 0 S2 Pumps 0 S84X 0 S127 Pumps 0 S3 Pumps 0 S71 0 S129 Pumps 0 S4 Pumps 0 S72 0 S131 Pumps 0 C5 0 Total Inflows: 559 Okeechobee Outflows (cfs): S135 Culverts 0 S354 924 S77 1832 S127 Culverts 0 S351 1188 S308 195 S129 Culverts 0 S352 434 S131 Culverts 0 L8 Canal Pt -NR- Total Outflows: 4573 ****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 0.29 S308 0.34 Average Pan Evap x 0.75 Pan Coefficient = 0.24" = 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 -6353 cfs or -12600 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: 13.43 13.75 0 0 0 0 0 0 (cfs) S193: ______ S191: 18.25 13.74 0 0.0 0.0 0.0 S135 Pumps: 12.78 13.58 0 0 0 0 0 (cfs) S135 Culverts: 0 0.0 0.0 North West Shore S65E: 20.86 13.97 546 0.5 0.4 0.0 0.0 0.0 0.4 S65EX1: 20.86 13.97 0 S127 Pumps: 13.31 13.78 0 0 0 0 0 0 (cfs) S127 Culvert: 0 0.0 S129 Pumps: 12.86 13.70 0 0 0 0 (cfs) S129 Culvert: 0 0.0 S131 Pumps: 13.13 13.67 0 0 0 (cfs) S131 Culvert: 0 Fisheating Creek nr Palmdale 28.56 13 nr Lakeport ______ C5: ______ -NR- 0 -NR- -NR- -NR- South Shore S4 Pumps: 11.54 13.58 0 0 0 0 (cfs) S169: 13.53 11.59 -NR- 1.3 -NR- 0.8 S310: 13.58 148 S3 Pumps: 10.12 13.54 0 0 0 0 (cfs) S354: 13.54 10.12 924 2.5 2.5 S2 Pumps: 10.28 -NR- 0 0 0 0 0 (cfs) S351: -NR- 10.28 1188 1.8 1.7 1.8 S352: 13.76 10.45 434 0.8 0.8 C10A: -NR- 13.53 8.0 8.0 8.0 0.0 0.0 L8 Canal PT ______ -NR- _________________________________________________________________________ S351 and S352 Temporary Pumps/S354 Spillway S351: 10.28 -NR- 1188 -NR--NR--NR--NR--NR--NR- S352: 10.45 13.76 434 -NR--NR--NR--NR- S354: 10.12 13.54 924 -NR--NR--NR--NR- _________________________________________________________________________ Caloosahatchee River (S77, S78, S79) S47B: 13.19 12.56 1.1 1.6 S47D: 12.53 11.31 12 0.0 S77: Spillway and Sector Preferred Flow: 13.44 11.22 1830 2.5 2.5 2.5 2.5 Flow Due to Lockages+: 2 S78: Spillway and Sector Flow: 11.21 3.11 1551 1.0 0.0 2.5 1.0 Flow Due to Lockages+: 11 S79: Spillway and Sector Flow: 3.27 0.47 1986 0.5 1.0 1.0 1.0 0.0 1.0 1.0 1.0 Flow Due to Lockages+: 6 Percent of flow from S77 92% Chloride (ppm) 0 St. Lucie Canal (S308, S80) S308: Spillway and Sector Preferred Flow: 13.57 13.44 194 0.0 0.0 0.0 0.0 Flow Due to Lockages+: 1 S153: 19.00 12.99 0 0.0 0.0 S80: Spillway and Sector Flow: 13.28 0.98 0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Flow Due to Lockages+: 25 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 0.02 0.02 342 2 S78: 0.19 0.19 1.06 16 1 S79: 0.00 0.44 0.44 349 3 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 0.00 0.92 115 4 S80: 0.30 0.56 1.01 105 0 Okeechobee Average 0.00 0.00 0.07 (Sites S78, S79 and S80 not included) ----------------------------------------------------------------- Oke Nexrad Basin Avg -NR- 0.00 0.00 ----------------------------------------------------------------- ______________________________________________________________________________ Okeechobee Lake Elevations 11 MAY 2021 13.68 Difference from 11MAY21 11MAY21 -1 Day = 10 MAY 2021 13.71 0.03 11MAY21 -2 Days = 09 MAY 2021 13.74 0.06 11MAY21 -3 Days = 08 MAY 2021 13.79 0.11 11MAY21 -4 Days = 07 MAY 2021 13.84 0.16 11MAY21 -5 Days = 06 MAY 2021 13.87 0.19 11MAY21 -6 Days = 05 MAY 2021 13.88 0.20 11MAY21 -7 Days = 04 MAY 2021 13.92 0.24 11MAY21 -30 Days = 11 APR 2021 14.16 0.48 11MAY21 -1 Year = 11 MAY 2020 11.17 -2.51 11MAY21 -2 Year = 11 MAY 2019 11.29 -2.39 ______________________________________________________________________________ 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 11MAY21 Today = 11 MAY 2021 -1196 WED | -1782 11MAY21 -1 Day = 10 MAY 2021 -1453 TUE | -1564 11MAY21 -2 Days = 09 MAY 2021 -1814 MON | -6175 11MAY21 -3 Days = 08 MAY 2021 -1282 SUN | -6520 11MAY21 -4 Days = 07 MAY 2021 -736 SAT | -2872 11MAY21 -5 Days = 06 MAY 2021 -616 FRI | 1378 11MAY21 -6 Days = 05 MAY 2021 -1265 THU | -3513 11MAY21 -7 Days = 04 MAY 2021 -1153 WED | -1019 11MAY21 -8 Days = 03 MAY 2021 -5 TUE | 615 11MAY21 -9 Days = 02 MAY 2021 352 MON | 442 11MAY21 -10 Days = 01 MAY 2021 166 SUN | -3588 11MAY21 -11 Days = 30 APR 2021 405 SAT | 9983 11MAY21 -12 Days = 29 APR 2021 -332 FRI | 1446 11MAY21 -13 Days = 28 APR 2021 -418 THU | -3577 ______________________________________________________________________________ ______________________________________________________________________________ S65E Average Flow over previous 14 days | Avg-Daily Flow 11MAY21 Today= 11 MAY 2021 717 WED | 636 11MAY21 -1 Day = 10 MAY 2021 745 TUE | 718 11MAY21 -2 Days = 09 MAY 2021 769 MON | 662 11MAY21 -3 Days = 08 MAY 2021 797 SUN | 707 11MAY21 -4 Days = 07 MAY 2021 823 SAT | 758 11MAY21 -5 Days = 06 MAY 2021 844 FRI | 419 11MAY21 -6 Days = 05 MAY 2021 894 THU | 0 11MAY21 -7 Days = 04 MAY 2021 976 WED | 325 11MAY21 -8 Days = 03 MAY 2021 1026 TUE | 1003 11MAY21 -9 Days = 02 MAY 2021 1028 MON | 948 11MAY21 -10 Days = 01 MAY 2021 1023 SUN | 812 11MAY21 -11 Days = 30 APR 2021 1040 SAT | 1032 11MAY21 -12 Days = 29 APR 2021 1029 FRI | 1003 11MAY21 -13 Days = 28 APR 2021 1014 THU | 1012 ______________________________________________________________________________ ______________________________________________________________________________ S65EX1 Average Flow over previous 14 days | Avg-Daily Flow 11MAY21 Today= 11 MAY 2021 137 WED | 0 11MAY21 -1 Day = 10 MAY 2021 137 TUE | 0 11MAY21 -2 Days = 09 MAY 2021 137 MON | 0 11MAY21 -3 Days = 08 MAY 2021 137 SUN | 0 11MAY21 -4 Days = 07 MAY 2021 137 SAT | 0 11MAY21 -5 Days = 06 MAY 2021 137 FRI | 357 11MAY21 -6 Days = 05 MAY 2021 111 THU | 911 11MAY21 -7 Days = 04 MAY 2021 46 WED | 646 11MAY21 -8 Days = 03 MAY 2021 16 TUE | 0 11MAY21 -9 Days = 02 MAY 2021 44 MON | 0 11MAY21 -10 Days = 01 MAY 2021 44 SUN | 0 11MAY21 -11 Days = 30 APR 2021 44 SAT | 0 11MAY21 -12 Days = 29 APR 2021 44 FRI | 0 11MAY21 -13 Days = 28 APR 2021 44 THU | 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) 11 MAY 2021 3636 4300 3096 3882 10 MAY 2021 4586 5019 3224 6074 09 MAY 2021 5021 5018 3816 3996 08 MAY 2021 4392 4193 3419 4416 07 MAY 2021 3881 4071 2944 4216 06 MAY 2021 3938 4189 2913 4388 05 MAY 2021 4097 4207 2876 4235 04 MAY 2021 3743 3827 2855 4103 03 MAY 2021 3303 3503 2897 4021 02 MAY 2021 3374 3877 2950 3514 01 MAY 2021 3544 3998 2975 3911 30 APR 2021 4618 4896 3158 4121 29 APR 2021 4981 4953 3541 3899 28 APR 2021 3715 3738 3155 4063 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) 11 MAY 2021 293 2356 861 1833 -NR- 10 MAY 2021 259 1827 870 1701 -NR- 09 MAY 2021 247 1498 730 1423 -NR- 08 MAY 2021 137 1754 671 1240 -NR- 07 MAY 2021 350 974 657 1022 -NR- 06 MAY 2021 280 1086 624 746 -NR- 05 MAY 2021 295 2363 1575 1142 -NR- 04 MAY 2021 367 2313 1580 2226 -NR- 03 MAY 2021 242 2211 1362 2456 -NR- 02 MAY 2021 120 2213 1279 2207 -NR- 01 MAY 2021 135 2335 1262 2201 -NR- 30 APR 2021 169 2640 1094 2185 -NR- 29 APR 2021 285 2657 1061 2065 -NR- 28 APR 2021 352 2528 970 1955 -NR- S-308 Below S-308 S-80 Discharge Discharge Discharge (ALL DAY) (ALL-DAY) (ALL-DAY) DATE (AC-FT) (AC-FT) (AC-FT) 11 MAY 2021 382 306 49 10 MAY 2021 401 367 53 09 MAY 2021 1 289 40 08 MAY 2021 1 70 54 07 MAY 2021 287 97 47 06 MAY 2021 346 236 56 05 MAY 2021 431 -NR- 53 04 MAY 2021 484 445 41 03 MAY 2021 116 -26 40 02 MAY 2021 2 -61 55 01 MAY 2021 162 28 56 30 APR 2021 765 442 59 29 APR 2021 349 169 57 28 APR 2021 416 651 61 *** 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 12MAY2021 @ 07:45 ** Preliminary Data - Subject to Revision **