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 **