Please follow http://www.wcc.nrcs.usda.gov/webmap/index.html#elements=&networks=SCAN&states=!&counties=!&hucs=&minElevation=&maxElevation=&elementSelectType=any&activeOnly=true&hucLabels=false&stationLabels=&overlays=&hucOverlays=&mode=stations&openSections=dataElement,parameter,date,elements,location,networks&controlsOpen=true&popup=&base=esriNgwm&dataElement=PREC¶meter=PCTAVG&frequency=DAILY&duration=null&customDuration=&dayPart=E&year=2016&month=2&day=18&monthPart=E&lat=54.57&lon=-69.96&zoom=3.