Detailed Weather Data for Project:  KEYS

Date       Time       TAIR     WSPD     RELH     SRAD
17May2018  8 a.m.    67.24     3.06   100.31    90.00
17May2018  9 a.m.    67.93     3.14   100.32   341.00
17May2018 10 a.m.    71.55     4.12    93.30   630.00
17May2018 11 a.m.    75.96     3.78    71.93   799.00
17May2018 12 p.m.    77.81     4.05    65.09   888.00
17May2018  1 p.m.    79.77     6.18    55.13   987.00
17May2018  2 p.m.    81.77     4.48    46.83  1028.00
17May2018  3 p.m.    83.19     4.23    41.09   983.00
17May2018  4 p.m.    83.97     4.97    41.70   794.00
17May2018  5 p.m.    86.04     2.95    38.10   459.00
17May2018  6 p.m.    84.63     2.00    39.57   418.00
17May2018  7 p.m.    83.97     5.08    38.41   308.00
17May2018  8 p.m.    83.19     7.40    58.97    41.00
17May2018  9 p.m.    80.33     4.00    51.95     2.00
17May2018 10 p.m.    76.48     2.64    60.81     0.00
17May2018 11 p.m.    71.55     2.31    74.11     0.00
18May2018 12 a.m.    73.63     1.33    74.61     0.00
18May2018  1 a.m.    71.01     2.32    76.44     0.00
18May2018  2 a.m.    69.13     3.25    80.66     0.00
18May2018  3 a.m.    67.59     3.86    88.16     0.00
18May2018  4 a.m.    66.38     3.59    90.96     0.00
18May2018  5 a.m.    64.83     3.30    94.99     0.00
18May2018  6 a.m.    64.29     3.20    96.53     0.00
18May2018  7 a.m.    65.17     3.59    97.26    42.00

Accuml.
 Values            1797.40    88.83  1677.23  7810.00
Num. Valid
 Values                 24       24       24       24
Avg. Values          74.89     3.70    69.88   325.42

 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS:
SRAD  == CAL / SQUARE CENTIMETER
WSPD  == KILOMETERS PER DAY
TAIR  == DEGREES CELSIUS
RELH  == PERCENT  

Converted Values     23.83   142.93    69.88   671.50

Now start computations towards evaporation in inches per day
Each intermediate calculation step will be shown.

  xcompl = 0.3012   
   definition: xcompl = 1 - (RELH_avg/100)

  TdC =   18.1109   
   definition: TdC = TAIR_avg -  ((14.55 + (0.114*TAIR_avg))*xcompl +pow((2.5 + 0.007*TAIR_avg)*xcompl, 3) + (15.9 +0.117*TAIR_avg)*pow(xcompl, 14))

  del_lambda1 =    0.7289   
   definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1)

  del_lambda2 =    0.2711   
   definition: del_lambda2 = 1 - del_lambda1

  Qn =    9.0228   
   definition: Qn = 0.00714*SRAD_avg + 0.00000526*SRAD_avg*pow(TAIR_avg+17.8, 1.87) +0.00000394*pow(SRAD_avg, 2) - 0.00000000239*pow(SRAD_avg, 2)*pow(TAIR_avg-7.2, 2) - 1.02

  es_ea =    8.7422   
   definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8))

  Ea =    5.6240   
   definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg)

Daily Evap:    0.319 inches
   definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4