U. S. Army Corps of Engineers, Jacksonville District
                       Lake Okeechobee and Vicinity Report
                   ** Preliminary Data - Subject to Revision **
 
Data Ending 2400 hours   25 APR 2017
_____________________________________________________________________________
 
Okeechobee Lake Regulation      Elevation   Last Year  2YRS Ago
                                (ft-NGVD)   (ft-NGVD)  (ft-NGVD)
  *Okeechobee Lake Elevation       11.77       14.42    13.76 (Official Elv)
  Bottom of High Lake Mngmt= 16.76  Top of Water Short Mngmt= 11.08
  Currently in Operational Management Band
 
  Simulated Average LORS2008 [1965-2000]    12.52
  Difference from Average LORS2008         -0.75
 
  25APR (1965-2007) Period of Record Average    13.74
  Difference from POR Average                  -1.97
 
  Today Lake Okeechobee elevation is determined from the 4 Int & 4 Edge stations
 
  ++Navigation Depth (Based on 2007 Channel Condition Survey) Route 1 ÷  5.71'
  ++Navigation Depth (Based on 2008 Channel Condition Survey) Route 2 ÷  3.91'
  Bridge Clearance = 51.97'
______________________________________________________________________________
 
4 Interior and 4 Edge Okeechobee Lake Average (Avg-Daily values):
 
  L001   L005   L006   LZ40   S4     S352   S308   S133
  11.65  11.65  11.85  11.76  11.66  12.01   11.88 11.70
 
 
 *Combination Okeechobee  Avg-Daily Lake Average =  11.77
                                                   (*See Note)
______________________________________________________________________________
 
Okeechobee Inflows (cfs):
  S65E              0      S65EX1          233      Fisheating Cr     0
  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:    233
 
Okeechobee Outflows (cfs):
  S135 Culverts     0      S354            790      S77             348
  S127 Culverts     0      S351             68      S77Below        270
  S129 Culverts     0      S352            249      S308            976
  S131 Culverts     0      L8 Canal Pt      35      S308Below       -99
Total Outflows:   2466
 
****S77 Structure outflow is being used to compute Total Outflow.
****S308 Structure outflow is being used to compute Total Outflow.
 
Okeechobee Pan Evaporation (inches):
  S77            0.18      S308           0.34
  Average Pan Evap x 0.75 Pan Coefficient =  0.19" =  0.02'
 
Lake Average Precipitation using NEXRAD: =  0.00" =  0.00'
 
Evaporation - Precipitation:             =  0.19" =  0.02'
Evaporation - Precipitation using Lake Area of 730 square miles
  is equal to   3828 cfs out of the lake.
Lake Okeechobee (Change in Storage) Flow is  -7210 cfs or -14300 AC-FT
______________________________________________________________________________
______________________________________________________________________________
 
 
 
Note: Headwater, tailwater, and stage values below are instantaneous values
      unless otherwise specified.
 
             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:  11.93     11.89       0      0    0    0    0    0  (cfs)
  S193:       ______
  S191:        17.18     11.73       0    0.0  0.0  0.0
  S135 Pumps:  11.30     11.69       0      0    0    0    0       (cfs)
  S135 Culverts:                     0    0.0  0.0
 
North West Shore
  S65E:        20.96     11.72       0    0.0  0.0  0.0  0.0  0.0  0.0
  S65EX1:      20.96     11.72     233
  S127 Pumps:  11.93     11.66       0      0    0    0    0    0  (cfs)
  S127 Culvert:                      0    0.0
 
  S129 Pumps: ______      -NR-       0      0    0    0            (cfs)
  S129 Culvert:                      0   -NR-
 
  S131 Pumps:  12.34     11.53       0      0    0                 (cfs)
  S131 Culvert:                      0
 
  Fisheating Creek
    nr Palmdale          27.60       0
    nr Lakeport         ______
  C5:          11.43    11.57        0      0.0  3.0  0.0
 
South Shore
  S4 Pumps:    11.37     11.56       0      0    0    0            (cfs)
  S169:        11.64     11.36       0    0.0  0.0  0.0
  S310:        11.59                37
  S3 Pumps:    11.15     11.68       0      0    0    0            (cfs)
  S354:        11.68     11.15     790    4.0  4.0
  S2 Pumps:    10.43     11.71       0      0    0    0    0       (cfs)
  S351:        11.71     10.43      68    1.0  1.0  0.8
  S352:        12.14     11.48     249    0.0  0.0
  C10A:         -NR-     12.13            0.0   8.0   8.0   8.0   8.0
  L8 Canal PT            11.92      35
 
  _________________________________________________________________________
                   S351 and S352 Temporary Pumps/S354 Spillway
 
  S351:        10.43     11.71      68  -NR--NR--NR--NR--NR--NR-
  S352:        11.48     12.14     249  -NR--NR--NR--NR-
  S354:        11.15     11.68     790  -NR--NR--NR--NR-
  _________________________________________________________________________
 
Caloosahatchee River (S77, S78, S79)
  S47B:        13.45     11.29            0.0  0.0
  S47D:        11.31     11.33      -2    6.0
  S77:
    Spillway and Sector Flow:
               11.44     11.36     347  2.5  0.0  2.5  0.5
    Flow Due to Lockages+:           1
 
  S77 Below USGS Flow Gage         270
 
  S78:
    Spillway and Sector Flow:
               11.19      2.88      57    0.0  0.0  0.0  0.0
    Flow Due to Lockages+:          19
 
  S79:
    Spillway and Sector Flow:
                3.00      0.72     622    0.0  0.0  0.0  0.7  0.0  0.0  0.0  0.0
    Flow Due to Lockages+:           7
    Percent of flow from S77        56%
    Chloride            (ppm)    103
 
 
St. Lucie Canal (S308, S80)
  S308:
    Spillway and Sector Flow:
               11.92     11.53     976  0.0  0.0  0.0  0.0
    Flow Due to Lockages+:           0
 
  S308 Below USGS Flow Gage        -99
  S153:        18.55     11.36       0    0.0  0.0
  S80:
    Spillway and Sector Flow:
               11.78      2.06       0    0.0  0.0  0.0  0.0  0.0  0.0  0.0
    Flow Due to Lockages+:          24
    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.
______________________________________________________________________________
                                                               ----- 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:                         0.20        1.01        1.01      287       0
  S78:                         0.00        0.36        0.36      291       2
  S79:                         0.00        0.73        0.76      270       0
  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        0.83        0.87      308      17
  S80:                         0.00        0.02        0.03      306       4
        Okeechobee Average     0.10        0.14        0.14
        (Sites S78, S79 and S80 not included)
  -----------------------------------------------------------------
  Oke Nexrad Basin Avg         0.00        1.00        1.49
  -----------------------------------------------------------------
 
 
______________________________________________________________________________
Okeechobee Lake Elevations  25 APR 2017           11.77 Difference from 25APR17
   25APR17  -1 Day  =       24 APR 2017           11.81             0.04
   25APR17  -2 Days =       23 APR 2017           11.78             0.01
   25APR17  -3 Days =       22 APR 2017           11.73            -0.04
   25APR17  -4 Days =       21 APR 2017           11.78             0.01
   25APR17  -5 Days =       20 APR 2017           11.82             0.05
   25APR17  -6 Days =       19 APR 2017           11.86             0.09
   25APR17  -7 Days =       18 APR 2017           11.90             0.13
   25APR17 -30 Days =       26 MAR 2017           12.68             0.91
   25APR17  -1 Year =       25 APR 2016           14.42             2.65
   25APR17  -2 Year =       25 APR 2015           13.76             1.99
______________________________________________________________________________
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
   25APR17    Today =       25 APR 2017     -1787  WED     |     -5720
   25APR17  -1 Day  =       24 APR 2017     -1485  TUE     |      5980
   25APR17  -2 Days =       23 APR 2017     -2169  MON     |     10738
   25APR17  -3 Days =       22 APR 2017     -3390  SUN     |     -5861
   25APR17  -4 Days =       21 APR 2017     -3579  SAT     |     -3356
   25APR17  -5 Days =       20 APR 2017     -4229  FRI     |     -3336
   25APR17  -6 Days =       19 APR 2017     -4129  THU     |     -3133
   25APR17  -7 Days =       18 APR 2017     -4015  WED     |     -1091
   25APR17  -8 Days =       17 APR 2017     -4051  TUE     |     -1225
   25APR17  -9 Days =       16 APR 2017     -3750  MON     |     -3679
   25APR17 -10 Days =       15 APR 2017     -3534  SUN     |     -4447
   25APR17 -11 Days =       14 APR 2017     -3585  SAT     |     -5093
   25APR17 -12 Days =       13 APR 2017     -3307  FRI     |      -695
   25APR17 -13 Days =       12 APR 2017     -3658  THU     |     -4106
______________________________________________________________________________
______________________________________________________________________________
                                 S65E
                       Average Flow over previous 14 days  |  Avg-Daily Flow
   25APR17     Today=       25 APR 2017         0  WED     |         0
   25APR17  -1 Day  =       24 APR 2017         8  TUE     |         0
   25APR17  -2 Days =       23 APR 2017         8  MON     |         0
   25APR17  -3 Days =       22 APR 2017         8  SUN     |         0
   25APR17  -4 Days =       21 APR 2017         8  SAT     |         0
   25APR17  -5 Days =       20 APR 2017         8  FRI     |         0
   25APR17  -6 Days =       19 APR 2017         8  THU     |         0
   25APR17  -7 Days =       18 APR 2017         8  WED     |         0
   25APR17  -8 Days =       17 APR 2017         8  TUE     |         0
   25APR17  -9 Days =       16 APR 2017         8  MON     |         0
   25APR17 -10 Days =       15 APR 2017         8  SUN     |         0
   25APR17 -11 Days =       14 APR 2017         8  SAT     |         0
   25APR17 -12 Days =       13 APR 2017         8  FRI     |         0
   25APR17 -13 Days =       12 APR 2017         8  THU     |         0
______________________________________________________________________________
______________________________________________________________________________
                                 S65EX1
                       Average Flow over previous 14 days  |  Avg-Daily Flow
   25APR17     Today=       25 APR 2017       269   WED     |       233
   25APR17  -1 Day  =       24 APR 2017       266   TUE     |       271
   25APR17  -2 Days =       23 APR 2017       267   MON     |       271
   25APR17  -3 Days =       22 APR 2017       266   SUN     |       252
   25APR17  -4 Days =       21 APR 2017       267   SAT     |       241
   25APR17  -5 Days =       20 APR 2017       271   FRI     |       270
   25APR17  -6 Days =       19 APR 2017       275   THU     |       269
   25APR17  -7 Days =       18 APR 2017       278   WED     |       270
   25APR17  -8 Days =       17 APR 2017       281   TUE     |       288
   25APR17  -9 Days =       16 APR 2017       282   MON     |       237
   25APR17 -10 Days =       15 APR 2017       287   SUN     |       286
   25APR17 -11 Days =       14 APR 2017       291   SAT     |       327
   25APR17 -12 Days =       13 APR 2017       289   FRI     |       271
   25APR17 -13 Days =       12 APR 2017       294   THU     |       273
______________________________________________________________________________
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 APR 2017    677        536         137       1188
24 APR 2017    624        844         663       1852
23 APR 2017   1882       1857        1380       1601
22 APR 2017   1916       1530        1008        247
21 APR 2017   1019        600          28        240
20 APR 2017    950        394          32         17
19 APR 2017   1163     ******         121        137
18 APR 2017   1827       1423         464        529
17 APR 2017   2145       1896         999        813
16 APR 2017   2382       2375        1733       1238
15 APR 2017   1783       1516        1049       1172
14 APR 2017   -NR-        846         215        277
13 APR 2017   -NR-       1058         209         95
12 APR 2017   -NR-       1233         342        298
 
             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 APR 2017     73         99       436        1479         69
24 APR 2017     20          0         0         494       -260
23 APR 2017      7        773       512          59       -230
22 APR 2017     86       1862      1327         591        -90
21 APR 2017     73       2419      1372        1616        -71
20 APR 2017     40       2477      1370        1674       -129
19 APR 2017     34       2699      1388        1816       -257
18 APR 2017     86       2737      1396        1666       -242
17 APR 2017    113       2407      1281        1354       -260
16 APR 2017    177       1997      1277         611       -284
15 APR 2017    151       2058      1297         781       -299
14 APR 2017    100       2330      1356         896       -123
13 APR 2017    111       2300      1412        1576        -71
12 APR 2017    158       2397      1582        1535         -3
 
             S-308    Below S-308    S-80
           Discharge   Discharge   Discharge
           (ALL DAY)   (ALL-DAY)   (ALL-DAY)
   DATE     (AC-FT)     (AC-FT)     (AC-FT)
25 APR 2017   1966        -197          47
24 APR 2017   2058        -162          41
23 APR 2017   1228         -97          36
22 APR 2017   2316         406          64
21 APR 2017   2804         592          48
20 APR 2017   3161         390          43
19 APR 2017   2035         291          35
18 APR 2017   -NR-         569          45
17 APR 2017   -NR-         572          43
16 APR 2017   4794         215          49
15 APR 2017   2714         220          48
14 APR 2017   2714          67          56
13 APR 2017   1072          75          47
12 APR 2017      1         306          44
 
***  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 26APR2017 @ 17:38  ** Preliminary Data - Subject to Revision **