Download hourly flow values for an NHD COMID from the National Water Model version 2.0. Returned data is availiable between "1993-01-01" and "2017-12-31" but can be subset using a startDate and endDate.
readNWMdata( comid = NULL, siteNumber = NULL, startDate = "1993-01-01", endDate = "2018-12-31", tz = "UTC", version = 2 )
| comid | a NHD common identifier |
|---|---|
| siteNumber | a USGS NWIS site number (eight digits) |
| startDate | a start date (YYYY-MM-DD) |
| endDate | an end date (YYYY-MM-DD) |
| tz | the desired timezone of the data. Can be found with `OlsonNames()` |
| version | the NWM version to extract (current = 1.2 or 2.0 (default)) |
data.frame