U. S. Army Corps of Engineers, Jacksonville District
                       Lake Okeechobee and Vicinity Report
 
Data Ending 2400 hours   20 APR 2008
_____________________________________________________________________________
 
Okeechobee Lake Regulation      Elevation   Last Year  2YRS Ago
                                (ft-NGVD)   (ft-NGVD)  (ft-NGVD)
  *Okeechobee Lake Elevation       10.42        9.93    13.89 (Official Elv)
  Regulation Zone Elevations    B=  -NR-    C= 16.84   D= 15.92     E= 13.85
 
  20APR (1965-2006) Period of Record Average    13.94
  Difference from POR Average                  -3.52
 
  Simulated Average LORSS2007 TSP[1965-2000]    12.61
  Difference from Average LORSS2007 TSP        -2.19
 
  Today Lake Okechobee elevation is determined from the 4 interior stations
 
  ++Navigation Depths (Based on 2001 Channel Condition Survey) Route 1 ÷  4.36'
                                                               Route 2 ÷  1.76'
  Bridge Clearance = 53.14'
______________________________________________________________________________
 
4 Interior and 4 Edge Okeechobee Lake Average (Avg-Daily values):
                                     (BAD)
  L001   L005   L006   LZ40   S4     S352   S308   S133
  10.36  10.37  10.44  10.52  10.47  10.69   10.45 10.58
 
 *Combination Okeechobee  Avg-Daily Lake Average =  10.48
                                                   (*See Note)
 
Interior Okeechobee Lake Average (Avg-Daily values):
  L001   L005   L006   LZ40
  10.36  10.37  10.44  10.52
 
 *Interior Okeechobee Avg-Daily Lake Average =    10.42
                                                 (*See Note)
 
Okeechobee Lake Average (Avg-Daily values):
               (BAD)  (BAD)   (BAD)                       (BAD)  (BAD)
  C5     S4     S3     S2     S352   S308   S135   S133   S127   S129
  10.46  10.47  10.55  10.49  10.69   10.45 10.47  10.58  11.07  11.29
 
 *Edge Okeechobee Avg-Daily Lake Average =        10.65
                                                 (*See Note)
 
______________________________________________________________________________
 
Okeechobee Inflows (cfs):
  S65E           1392      S191           3227      Fisheating Cr  -NR-
  S154              0      S133 Pumps        0      S135 Pumps        0
  S84               0      S127 Pumps        0      S2 Pumps          0
  S71               0      S129 Pumps        0      S3 Pumps          0
  S72               0      S131 Pumps        0      S4 Pumps          0
Total Inflows:   4619
 
Okeechobee Outflows (cfs):
  S135 Culverts     0      S354           -NR-      S77             200
  S127 Culverts  -NR-      S351           -NR-      S308    (BAD)     0
  S129 Culverts     0      S352              0
  S131 Culverts            L8 Canal Pt    -296
  C5             -NR-
Total Outflows:   -95 (BAD VALUE)
 
Okeechobee Pan Evaporation (inches):
  S77            0.18      S308           0.25
  Average Pan Evap x 0.75 Pan Coefficient =  0.16" =  0.01'
 
Lake Average Precipitation using NEXRAD: =  0.08" =  0.01'
 
Evaporation - Precipitation:             =  0.08" =  0.01'
Evaporation - Precipitation using Lake Area of 730 square miles
  is equal to   1595 cfs out of the lake.
Lake Okeechobee (Change in Storage) Flow is  -3328 cfs or  -6600 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:  12.80     10.49       0      0    0    0    0    0  (cfs)
  S193:       ______
  S191:        19.65     10.39    3227    0.0  6.6  0.0
  S135 Pumps:  11.56     10.48       0      0    0    0    0       (cfs)
  S135 Culverts:                     0    0.0  0.0
 
North West Shore
  S65E:        20.76     10.11    1392    0.5  0.5  0.3  0.4  0.4  0.4
  S127 Pumps:  13.10     11.09       0      0    0    0    0    0  (cfs)
  S127 Culvert:                   -NR-   -NR-
 
  S129 Pumps:  10.98     11.25       0      0    0    0            (cfs)
  S129 Culvert:                      0    0.0
 
  S131 Pumps:  12.35     11.58       0      0    0                 (cfs)
  S131 Culvert:
 
  Fisheating Creek
    nr Palmdale         ______    -NR-
    nr Lakeport         ______
  C5:         ______    10.46   -NR-   -NR- -NR- -NR-
 
South Shore
  S4 Pumps:    10.52     10.49       0      0    0    0            (cfs)
  S169:        10.49     10.72       0    0.0  0.0  0.0
  S310:       ______              -NR-
  S3 Pumps:   ______      -NR-       0      0    0    0            (cfs)
  S354:         -NR-    ______    -NR-   -NR- -NR-
  S2 Pumps:    11.14     10.54       0      0    0    0    0       (cfs)
  S351:        10.54     11.14    -NR-   -NR- -NR- -NR-
  S352:        10.68     10.87       0   -NR- -NR-
  C10A:         -NR-     10.73           -NR-  -NR-   8.0  -NR-  -NR-
  L8 Canal PT            10.86    -296
 
  _________________________________________________________________________
                               Temporary Pumps
 
  S351:        11.14     10.54    -NR-  -NR--NR--NR--NR--NR--NR-
  S352:        10.87     10.68       0  -NR--NR--NR--NR-
  S354:       ______      -NR-    -NR-  -NR--NR--NR--NR-
  _________________________________________________________________________
 
Caloosahatchee River (S77, S78, S79)
  S47B:        10.28     10.61            0.0  0.0
  S47D:        10.63     10.32       0    0.0
  S77:
    Spillway and Sector Flow:
               10.74     10.47     200    0.8  0.8  0.8  0.8
    Flow Due to Lockages+:           0
 
  S78:
    Spillway and Sector Flow:
                -NR-      4.63    -NR-    0.0  0.0  0.0  0.0
    Flow Due to Lockages+:        -NR-
 
  S79:
    Spillway and Sector Flow:
                3.23      0.87       0    0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0
    Flow Due to Lockages+:           2
    Percent of flow from S77      -NR-%
    Chloride            (ppm)    181
 
 
St. Lucie Canal (S308, S80)
  S308:
    Spillway and Sector Flow:
               10.55     10.36       0    0.0  0.0  0.0  0.0
    Flow Due to Lockages+:           0
 
  S308 Below USGS Flow Gage        -41
  S153:        18.86     10.31       0   -NR-  0.0
  S80:
    Spillway and Sector Flow:
               10.56      1.46    -NR-    0.0  0.0  0.0  0.0  0.0  0.0  0.0
    Flow Due to Lockages+:        -NR-
    Percent of flow from S308     -NR-%
 
  Steele Point Top Salinity    (mg/ml)   31
  Steele Point Bottom Salinity (mg/ml)   29
 
  Speedy Point Top Salinity    (mg/ml)   19
  Speedy Point Bottom Salinity (mg/ml)   18
 
 + 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:           0.35        0.35        0.35
  S193:                        -NR-        0.00        0.00     -NR-    -NR-
  Okeechobee Field Station:    0.01        0.01        0.01
  S135 Pump Station:           0.08        0.08        0.08
  S127 Pump Station:           0.34        0.34        0.34
  S129 Pump Station:           0.00        0.00        0.00
  S131 Pump Station:           0.27        0.27        0.27
  S77:                         0.00        0.00        0.00      229       2
  S78:                         0.00        0.00        0.00       51       3
  S79:                         0.00        0.00        0.00      272       3
  S4 Pump Station:             -NR-        0.00        0.00
  Clewiston Field Station:     0.00        0.00        0.00
  S3 Pump Station:             0.00        0.00        0.00
  S2 Pump Station:             0.00        0.00        0.00
  S308:                        0.03        0.03        0.03       20       7
  S80:                         0.00        0.00        0.00       52       1
        Okeechobee Average     0.10        0.08        0.08
        (Sites S78, S79 and S80 not included)
 
______________________________________________________________________________
Okeechobee Lake Elevations  20 APR 2008           10.42 Difference from 20APR08
   20APR08  -1 Day  =       19 APR 2008           10.44             0.02
   20APR08  -2 Days =       18 APR 2008           10.42             0.00
   20APR08  -3 Days =       17 APR 2008           10.40            -0.02
   20APR08  -4 Days =       16 APR 2008           10.42             0.00
   20APR08  -5 Days =       15 APR 2008           10.42             0.00
   20APR08  -6 Days =       14 APR 2008           10.48             0.06
   20APR08  -7 Days =       13 APR 2008           10.50             0.08
   20APR08 -30 Days =       21 MAR 2008           10.17            -0.25
   20APR08  -1 Year =       20 APR 2007            9.93            -0.49
   20APR08  -2 Year =       20 APR 2006           13.89             3.47
______________________________________________________________________________
Long Term Mean 30day Avearge ET for Lake Alfred (Inches) =  4.31
______________________________________________________________________________
                         Lake Okeechobee Net Inflow (LONIN)
                   Average Flow over the previous 14 days  |  Avg-Daily Flow
   20APR08    Today =       20 APR 2008      -NR-  MON     |      -NR-
   20APR08  -1 Day  =       19 APR 2008      -NR-  SUN     |      -NR-
   20APR08  -2 Days =       18 APR 2008      -NR-  SAT     |      -NR-
   20APR08  -3 Days =       17 APR 2008      -NR-  FRI     |      -NR-
   20APR08  -4 Days =       16 APR 2008      -NR-  THU     |      -NR-
   20APR08  -5 Days =       15 APR 2008      -NR-  WED     |      -NR-
   20APR08  -6 Days =       14 APR 2008      -NR-  TUE     |      -NR-
   20APR08  -7 Days =       13 APR 2008      -NR-  MON     |      -NR-
   20APR08  -8 Days =       12 APR 2008      -NR-  SUN     |      -NR-
   20APR08  -9 Days =       11 APR 2008      -NR-  SAT     |      -NR-
   20APR08 -10 Days =       10 APR 2008      -NR-  FRI     |      -NR-
   20APR08 -11 Days =       09 APR 2008      -NR-  THU     |      -NR-
   20APR08 -12 Days =       08 APR 2008      -NR-  WED     |      -NR-
   20APR08 -13 Days =       07 APR 2008      -NR-  TUE     |      -NR-
______________________________________________________________________________
______________________________________________________________________________
                                 S65-E
                       Average Flow over previous 14 days  |  Avg-Daily Flow
   20APR08     Today=       20 APR 2008      1832  MON     |      1392
   20APR08  -1 Day  =       19 APR 2008      1850  SUN     |      1572
   20APR08  -2 Days =       18 APR 2008      1861  SAT     |      1569
   20APR08  -3 Days =       17 APR 2008      1877  FRI     |      1540
   20APR08  -4 Days =       16 APR 2008      1932  THU     |      1634
   20APR08  -5 Days =       15 APR 2008      1929  WED     |      1842
   20APR08  -6 Days =       14 APR 2008      1888  TUE     |      1876
   20APR08  -7 Days =       13 APR 2008      1873  MON     |      1868
   20APR08  -8 Days =       12 APR 2008      1874  SUN     |      1783
   20APR08  -9 Days =       11 APR 2008      1875  SAT     |      1822
   20APR08 -10 Days =       10 APR 2008      1881  FRI     |      1637
   20APR08 -11 Days =       09 APR 2008      1890  THU     |      2136
   20APR08 -12 Days =       08 APR 2008      1836  WED     |      3179
   20APR08 -13 Days =       07 APR 2008      1731  TUE     |      1797
______________________________________________________________________________
Lake Okeechobee Outlets Last 14 Days
 
             S-77       S-77       S-78       S-78    Below S308    S-308
           Discharge  Discharge  Discharge  Discharge  Discharge  Discharge
          (0700-2100) (ALL DAY) (0700-2100) (ALL DAY)  (ALL DAY)  (ALL DAY)
   DATE     (AC-FT)    (AC-FT)    (AC-FT)    (AC-FT)    (AC-FT)    (AC-FT)
20 APR 2008    239       397         0       -NR-        -81           0
19 APR 2008    192       358         0         25         -9           0
18 APR 2008    217       257         0         16        130           0
17 APR 2008     -1        10         0         12        132           1
16 APR 2008     34       -19         0          6         50           0
15 APR 2008   -218      -329         0         15         59           0
14 APR 2008   -371      -592         0         13          8           0
13 APR 2008   -319      -549         0         21         48           0
12 APR 2008   -550      -958         0         24         88           0
11 APR 2008   -635     -1224         0          9        260          63
10 APR 2008   -687     -1351         0         22        136           0
09 APR 2008   -327      -566         0         12        -83          -1
08 APR 2008   -121      -232         0       -NR-        -98          -1
07 APR 2008   -114      -199         0       -NR-        -38          -0
 
             S-79       S-310      S-351      S-352      S-354    L8 Canal Pt
           Discharge  Discharge  Discharge  Discharge  Discharge  Discharge
           (ALL DAY)  (ALL DAY)  (ALL DAY)  (ALL DAY)  (ALL DAY)  (ALL DAY)
   DATE     (AC-FT)    (AC-FT)    (AC-FT)    (AC-FT)    (AC-FT)    (AC-FT)
20 APR 2008      4      -NR-       -NR-         0        -NR-       -587
19 APR 2008      4      -NR-       -NR-         0        -NR-       -983
18 APR 2008      4      -NR-       -NR-         0        -NR-      -1084
17 APR 2008      6      -NR-       -NR-         0        -NR-      -1073
16 APR 2008      5      -NR-       -NR-         0        -NR-      -1091
15 APR 2008      4      -NR-       -NR-         0        -NR-      -1153
14 APR 2008    227      -NR-       -NR-         0        -NR-      -1271
13 APR 2008    380      -NR-       -NR-         0        -NR-      -1237
12 APR 2008    324      -NR-       -NR-         0        -NR-      -1305
11 APR 2008    322      -NR-       -NR-         0        -NR-      -1341
10 APR 2008    674      -NR-       -NR-         0        -NR-      -1181
09 APR 2008    795      -NR-       -NR-         0        -NR-       -666
08 APR 2008   2361      -NR-       -NR-         0        -NR-       -996
07 APR 2008   1695      -NR-       -NR-         0        -NR-      -1446
***  NOTE: 1)  Discharge from (0700-2100) is computed using Spillway and Sector
               Gate Discharges from 0700 hrs to 2100 hrs.
           2)  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
______________________________________________________________________________
   * As of 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, we began using the average of the interior 4 station gages
     as the official Lake Okeechobee Elevation.
   * On 16 April 2007,  Lake Okeechobee Elevation was switched to a 8 gage
     mixture of interior and exterior gages due to wind effects on Lake O
   (When the 4 station gages are not working the 10 station elevation is used)
     Today Lake Okechobee elevation is determined from the 4 interior stations
  ++ For more information see the Jacksonville District Navigation website
     at http://www.saj.usace.army.mil/hydroSurvey/hydro.htm
   $ For information regarding Lake Okeechobee Service Area water restrictions
     please refer to www.sfwmd.gov
______________________________________________________________________________
Report Generated 21APR2008 @ 13:15  ** Preliminary Data - Subject to Revision **