Changelog

• 2024-07-09: Add csv and excel output formats

Example Requests

Return all watches that had a polygon coincident with the point at 41.9N, 93.6W

https://mesonet.agron.iastate.edu/json/spcwatch.py?lat=41.9&lon=-93.6

Return all watches that were valid at 2024-08-01 00 UTC, sorry that this uses a lame format, will update to ISO8601 soon.

https://mesonet.agron.iastate.edu/json/spcwatch.py?ts=202408010000

Return the above, but in CSV format

https://mesonet.agron.iastate.edu/json/spcwatch.py?ts=202408010000&fmt=csv

And now excel

https://mesonet.agron.iastate.edu/json/spcwatch.py?ts=202408010000&fmt=excel

CGI Arguments

The following table lists the CGI arguments that are accepted by this service. A HTTP GET request is required. Fields of type Multi-Params or CSV value can accept either a comma separated list or multiple parameter and value combinations. For example, ?foo=1&foo=2 is equivalent to ?foo=1,2.

Field	Type	Description
fmt	string	The format to return data in, either json, excel, or csv
ts	string	The timestamp to query for
lat	number	The latitude to query for
lon	number	The longitude to query for
callback	string	Callback function for JSONP output