5. Nearest Weather Method
nearest_weather()
This method returns a list of weather codes matching submitted criteria
XSD: http://hesapi.lbl.gov/mf_api/xsd/nearest_weather
XSD documentation: http://documentation.hescloud.net/api/mf/xsd/hes-mf_xsd-nearest_weather_prd.htm
Parameters:
Notes:
* Additional years will be added as they become availble