pre 2014 precipitation intensity fix
pre 2014 precipitation intensity fix

* Use 5 minute NEXRAD data for functional form
* More expensive, but more accurate weighting of reflectivity
akrherz/idep,akrherz/dep,akrherz/dep,akrherz/idep,akrherz/idep,akrherz/idep,akrherz/idep,akrherz/idep,akrherz/dep,akrherz/dep,akrherz/dep