Acquisition of Climate data
The following material shows step by step directions on how to get climate data from a weather station using the http://weather.nmsu.edu/ web site.
3. Choose Leyendecker PSC (Plant Science Farm) weather station from the scroll menu.
Steps for getting Etr from the same website
2. Click on the Irrigation Management and GDD Climate Data Retrieval System link
3. Choose an appropriate weather station from the links on the right, must input January 1 and the year of interest for the start date. Enter the date for which Etr reading is required as the end date. For example here the end date is set as May 1 2006.
Choose METRIC units and select the Generate Crop Coefficient and ET selection item. Select Alfalfa from the Present Defaults scroll menu.
4. Click on Retrieve Weather Data button. Select P-M ET (Tall Ref.) cm field from the last row to get the required Etr value. To input the following Etr value in satet, please convert this value to millimeters.
Climate data can be acquired in other states. One location is the weather underground.
This site does not calculate reference Et nor solar radiation. The values can be acquired using the temperature data
And a Samani based calculator. The elevation data for the weather station can be acquired from Google earth us the lat, long
Given at the weather underground site for the weather station nearest to where you want to calculate lake or crop evapotranspiration.