Retrieve CNRFC raw observations for river forecast points

[narlesky]

Task

Provide a function in the collect.cnrfc module that retrieves the observation timeseries provided for certain CNRFC locations. Observed flow timeseries details pages are available via this URL format:

cnrfc_id = 'POHC1'
url = f'https://www.cnrfc.noaa.gov/obsRiver_hc.php?id={cnrfc_id}'

Steps

• [ ] Provide a method to download and convert observation timeseries data to a dataframe
• [ ] Possibly provide a method to include any metadata associated with the record
• [ ] Determine subset of forecast locations and possibly provide a method get_observed_record_forecast_locations
• [ ] Develop testing methods for the new functions

Breaking Changes

None expected

Priority

Medium